Category Archives: Abbie’s column

Abbie’s newspaper columns

More a murky khaki than clean and green

Our geographic isolation works to our advantage environmentally. But our clean and green tag has more to do with a very small population than with a high level of environmental awareness. Many of us have a long way to go before we can claim to be green and clean at a personal level and some have even further to go than others. It would be good if the gardening norm here embraced sustainability and sound environmental practice. I think it is described as gardening with the environment, not in spite of it.

A feature last week on the gardening pages of our regional newspaper highlighted an increasing awareness of environmental issues in public sector gardening. Followers of organics have also embraced sound practice at a personal level. But sitting in the middle is the vast majority of the population, including, alas, a fair proportion of gardeners.

Most of us accept clean and green as a statement of fact for New Zealand. A clean atmosphere, yes. Overall, we enjoy what must be some of the cleanest and freshest air in the world. But once you hit ground level, it is a different story. Yes, some people are extremely clean and green, but others, and they are large in number, could not care less.

Living where we do in the country, I can tell you that all that litter, almost without exception, is thrown out of car windows. It is nothing for us to collect over a supermarket bag full of inorganic rubbish just from our own stretch of road verge. An entirely unscientific study a little farther down the road suggests to me that on average, there would be a visible piece of plastic, glass, tin or similar every three metres on both sides of the road. Added to that is a whole lot of rubbish that has been cut to pieces whenever the verges are mowed. That is a lot of rubbish.

The weekend rubbish accumulation at the corner

The weekend rubbish accumulation at the corner

Down at the crossroads, there is a district council-sanctioned horror that is nothing short of bizarre. Founded on a belief that the vast majority of people will play the game, there is a rubbish collection point. The rules are that rubbish must be in approved bags with appropriate stickers and recycling will be collected free. No rubbish is meant to be left there before Sunday. The reality is that there are far too many people who couldn’t give a toss as long as the rubbish is not outside their house. From Saturday morning onwards, a veritable tsunami of assorted rubbish bags builds up, often ripped and with the contents falling out. Get a wind and it blows around the area. On Monday morning, the rubbish contractors come along and pick up the rubbish that meets regulations. What remains does not seem to be anybody’s responsibility, although from time to time, somebody will do a clean-up. Would I want to own one of the four properties around that corner? No. I can’t think windblown plastic and polystyrene are great for cows, and the recyclable light plastic bottles are also scattered widely. We open our garden to the public and get a fair number of overseas visitors. If they come at the weekend, they get to pass the unedifying sight of a small rubbish tip beside the road that would give anywhere in Asia a run for its money. Frankly, it is disgusting.

Straight after the rubbish collection on Monday morning - the pink stickers say why these bags were not collected.

Straight after the rubbish collection on Monday morning - the pink stickers say why these bags were not collected.

The current row over the use of 1080 also belongs to this environmental discussion. Yes, there are pros and cons on both sides, but what its use indicates is a high tolerance level and official sanctioning of the mass application of poison as the lesser of two evils. 1080 enters the food chain, as we well know, but at least it kills quickly. There are various over-the-counter poisons that are uncontrolled and readily available in this country. Cholecalciferol is one we learned about last year to our grief. Our little dog Wilfred took two weeks to die from slow poisoning and while final results were inconclusive, we are sure in our minds that we were dealing with secondary poisoning. The widespread use of rat poisons is questionable. Selling slow-acting poisons for vermin over the counter with no controls and no monitoring is no longer acceptable in large parts of the developed world. Not only do we use a scary amount of it here, but even many environmentalists will argue in favour of unleashing such toxins into the environment.

Home gardeners have seen a sharp reduction in the availability of many chemicals in recent years and given the often cavalier attitude to handling them in our gung-ho pioneer country, that is a jolly good thing. But our gardeners still have access to many sprays that are now tightly controlled overseas or simply no longer available. It could be that at least one reason for the increasing attention to organics in the developed world is that government regulation has removed most of the alternatives. If you can no longer buy fungicides or insecticides and the only available herbicide is glyphosate, then you have to look to other ways of managing garden pests.

The spray we have been talking about here most recently is copper. Now, in the scheme of things, copper is useful and the occasional seasonal application is unlikely to do any harm to the wider environment. What is disturbing is to see frequent and regular applications of copper every two or three weeks in the mistaken belief that it is safe. While copper is a natural trace element, it accumulates rather too well in soils and can reach toxic levels quite quickly. One useful measure for a home gardener is earthworms. If you are a regular user of copper and you don’t have many worms, that is an indicator of toxic levels. I would advise all gardeners to err on the side of caution and minimise its use. If you want to know more, try doing a search on http://www.sciencedirect.com. There is quite a bit of international research being done on the build up of copper residues in the soil as a result of repeated spraying.

Routine spraying used to be advised as a preventative measure, even for home gardeners. In this day and age, the much more advisable philosophy is to avoid application of chemicals where possible and, if you are going to use sprays, even simple copper, only use when needed, not according to some sort of timetable. In this case prevention is not better than a cure.

We can not continue to rely on this country’s geographic isolation to keep our environment clean. Gardeners espouse nature and beauty and celebrate the growing of plants so it seems a real contradiction when we employ practices which are suspect and dodgy. I am not sure that there is a whole lot of difference to throwing your rubbish out of the car window. I would rather our country was clean and green than murky khaki.

The appropriately named buxus blight

Buxus blight, fortunately not in our garden

Buxus blight, fortunately not in our garden

One of the frequently searched articles on our website is a piece I wrote a while ago on buxus blight (aka: why is my box hedging turning brown and looking as if it is dead and what can I do to resurrect it?) Given that we are a bit sniffy about box hedging here, it seems ironic that we are apparently seen as a source of information on the matter. Mind you, in deference to the level of interest and concern from others about both the short term look and the long term viability of their box hedging, I have been taking a slightly more than desultory interest in the whole matter.

You too can google it if you have some level of computer literacy and it is likely that you will come to the same conclusions from the international research and the anecdotes that I have. There are certain incontrovertible facts: it is a fungus called cylindrocladium and its rate of multiplication does not appear to be temperature related – in other words, it will multiply quickly in cold temperatures too. Most fungi thrive in warm, moist conditions but nasty buxus blight appears to be quite well adapted to cool and even dry conditions. The fungi spores are long-lived and can survive for years on dead leaves.

There are around 30 different species of buxus originating from Europe, Asia, the Americas and even North Africa. I have been told by individuals that the Asian forms from Japan and Korea (Buxus microphylla and microphylla var. koreana or Buxus sinica) don’t get it but the scientific evidence does not back this up. It is likely that the personal anecdote is based on the fact that in one particular location, this type of buxus is not showing signs of infection. That does not mean it won’t be affected in another location and the research says none are immune. The bottom line is that I wouldn’t be ripping out affected sempervirens (and suffruticosa, the very low and slow form used as an edger is still a sempervirens variation and is particularly susceptible) and replacing it with a different species of buxus, be it from Japan, Korea or anywhere else. I would be wanting to use a totally different plant family altogether.

You will know if you have buxus blight. Small dead patches are more likely to be dog urine or an accidental whiff of glyphosate. Buxus blight is simply devastating. The dead patches spread rapidly and do not show any willingness to regrow.

The first bit of bad news is that if you have buxus blight already, you will have to spray endlessly, for the rest of the buxus life, to keep the blight at bay because you won’t ever eliminate all the fungal spores. You can manage some level of control but the days when all your handy little hedge needed was clipping twice a year are over.

The second bit of bad news is that if you live in an urban area and do not yet have buxus blight, it is probably only a matter of time before you will get it because the fungal spores are easily dispersed by wind, so will gently spread throughout built up areas where there are host plants at regular intervals. You can reduce your chances of getting it but you are doing a King Canute number.

The good news is that if you live in the country and none of your neighbours have buxus blight, you may be able to keep it out because the spore don’t seem to be travelling quite as far as, say, camellia petal blight spore which have been tracked up to 5km. But quarantine your garden. Don’t bring in buxus plants or cuttings from other places unless you are 100% sure that the source is isolated and free of blight. Propagate your own additional plants at home. The international advice is that you should routinely quarantine all buxus plants brought in from other sites until you are sure they are free from blight. The problem is that quarantining plants at home is difficult. They need to be confined to a shed, glasshouse or nova house for an extended period of time and few people have the facilities to quarantine effectively which means that if by any chance the plants or cuttings you have brought in are harbouring the fungi, even if you try and keep them separate the spore will spread. Easier by far to seal your garden borders and not admit any foreign buxus. They are dead easy to propagate at home for even the most amateur gardener.

If you have masses of box hedging or topiary in your garden that you want to try and keep, you probably have to accept that it is going to take more work. Don’t let the hedge get too dense – there appears to be a connection between the ability of the plant to shed water quickly and slowing the fungal spread. Avoid overhead irrigation. Keep thinning the plants so they are not too dense and get as much of the build up of dry leaves and sticks out of the centre as possible to allow more air movement. There is some evidence that copper sprays will at least slow down the fungal spores and copper may be kinder to the environment than most anti-fungal sprays. It may be worth trying sulphur sprays too because sulphur has anti fungal properties. An all round rose spray may be effective if you are willing to treat your buxus hedge like your hybrid tea roses.

The big problem is what you can use instead of the infinitely useful buxus. There are three stand out characteristics of buxus. Number one is that you can keep it looking tidy on two clips a year and it does not grow too fast. Number two is that if you hard prune back to bare wood, it will resprout so you don’t end up with woody legs. Number three is that it roots so easily it is a doddle for the home gardener to produce and correspondingly cheap(ish) to buy. And we could add numbers four and five– that it is long lived and a good dark green. We are of the general opinion that hedges should be green. The problem is finding a substitute which meets all the above characteristics. Lonicera and teucrium are cheap and clip well but grow so rampantly that you have to clip frequently to keep them looking sharp. Small leafed camellias and totara clip really well and resprout from bare wood but are not easy to propagate so are much dearer to buy . Some of the small leafed hebes may clip well (but some don’t so you have to get your variety right) and root easily but are not always long lived. Pittosporums grow too well and get too tall too fast and tend to be a pale green in colour, not the desired dark shading. And they have larger leaves. Corokia can get a bit bare over time. Griselinia tend to have large leaves. Taxus (yew trees) are notoriously short lived in our climate because the roots get phytopthera. The biggest gap of all is the lack of a clear replacement for the dwarf suffriticosa which is used where a low edger is desired.

There is no like for like swap for box hedging. In the end, if box hedging features large in your garden and you have to cut your losses on it because of buxus blight, you may be wiser to go back to the drawing board and look at garden plans which don’t depend on clipped and well behaved little hedges for structure. We are mulling around the role filled by buxus hedging and will return with more thoughts on this in the future.

From meadows to motorway sidings with the classic border inbetween (part 4 English summer gardens)

Nobody does steps quite as well as Lutyens did

Nobody does steps quite as well as Lutyens did

Note: this follows on from the earlier column: English Summer Gardens – part 3.

I wrote two weeks ago about the English summer garden being a continuum stretching from natural meadows through to plantings on the sides of motorways or NZ traffic islands. I was gently drifting my way along this journey until I reached my word limit around the classic English country garden as exemplified by Penelope Hobhouse and the late Rosemary Verey. I had to stop there because suddenly there is a great big punctuation point with the late Christopher Lloyd at Great Dixter.

Great Dixter can be controversial. Mark stood in the garden and commented that it was a bit like an ongoing negotiation with nature. At its best, it is gifted and has clearly had an enormous influence on the direction taken in many New Zealand gardens. In the middle it can be somewhat serendipitous, but there are parts where there is a suspicion of the emperor’s new clothes. As a garden it sits between the meadow gardening–wildflower end of the spectrum which relies on a great deal of self seeding (and good chance) and the controlled Edwardian arts and crafts style synonymous with Edwin Lutyens and Gertrude Jekyll. Christopher Lloyd experimented all his life but his legacy to modern gardening is arguably the mixed border (using shrubs and clumping perennials in tandem and brave colour combinations) and the managed meadow. In New Zealand, we seized on the mixed border as if it was our own but alas it is not often carried out with the panache of Christo Lloyd and is frequently rather dull.

Historically Lutyens and Jekyll pre-dated Christo Lloyd and in fact Lutyens redesigned Great Dixter for the Lloyd parents. But on my continuum, they are more to the ordered and managed side. We travelled in part to see their legacy. Famous examples are Sissinghurst and Hestercomb but we also visited lesser known gardens. The spirit of the Lutyens-Jekyll style was formal landscaping by Lutyens in the Arts and Crafts mode (confined and defined spaces of the garden room type), softened by sweeping plantings designed by Jekyll. If you imagine beautiful stone work, clipped hedging, masses of blue delphiniums, extravagant fluffy pink peonies, pink and white roses and drifts of underplanting such as lambs’ ears (stachys), you will be on the right wavelength. It is very pretty although the borders and beds could be a bit on the narrow and busy side and it can get a little formulaic when you see a number of such gardens in a row. I suspect that it may be a little dated now. Certainly the very narrow borders worried me and I would want to rip them out. Keep the trademark Lutyens rounded stone steps, though. Nobody does steps like Lutyens.

Fortunately it was towards the end of our trip that we ended up at Wisley because there we saw a range of garden styles which gave us the framework to make sense of what we had seen.

Gifted and unusual colour combinations at Hyde Hall

Gifted and unusual colour combinations at Hyde Hall

Cue in the classic long border. Yes Great Dixter has one but Wisley sets the standard. Hyde Hall has a shorter long border divided into colour segments. Lots of gardens have the long border. At its Wisley splendour, it is two parallel borders with a wide grassy path between and we are talking a hundred and thirty metres long, each, and (here is the rub for many home gardeners) six metres wide. Beth Chatto’s garden is a whole series of freeform borders which curve and flow but are still following the principles of the long border. Such borders are often planted on terrain contoured to give extra height at the back. Because they froth out at the front (alchemilla mollis is a great favourite to achieve this effect and seems to be regarded as colour neutral), there is often a boundary of wide pavers defining the edge. This stops the frothing from killing the grass. Generally plants are layered from tallest at the back to lowest at the front and the crux of this type of planting is combinations of plant foliage and flower throughout the season. There is no mass planting. Many plants will need staking and deadheading and it is all extremely labour intensive. You need plenty of space for this type of voluptuous display.

For us, this is the zenith of summer gardening. On the days we visited, we ranked Beth Chatto top of the list for plant combinations and quality management of this intensive style of gardening, Hyde Hall top in genuinely original colour and flower combinations and Wisley all round top in the total package of scale, design, plant combinations and management.

But, Wisley does not stop at the long borders. Dutch designer Piet Oudolf has moved herbaceous planting on a few steps and, in front of the spectacular new glasshouse, Tom Stuart-Smith has taken it further. There is an element of modern pragmatism and indeed we were told that the new borders only require a third of the input of the traditional long borders and that is a huge difference. The Oudolf borders have attracted both praise and criticism. They are a great deal more controlled. The plant palette is restricted and most of the plants chosen do not require staking (or, I think, regular dead heading) and they are pretty much of a standard height. But it is not mass planting and the skill of striking plant combinations remains to the fore. Oudolf has worked with parallel borders again but used different plant combos in rivers flowing across, more or less in diagonal lines when viewed from above. Each river is comprised of three or four different types of plants.

Tom Stuart Smith has further refined the Oudolf technique, bringing it together with the sweeps of colour first espoused by Gertrude Jekyll and the prairie meadow concept currently in vogue to give grand sweeps of herbaceous plantings for the larger canvas. Much of the detail and complexity of the long borders has now gone, as has the need for intensive maintenance. But plantsmanship and design lifts it well above utility mass planting and while it may not appeal for smaller scale domestic gardens, it is a modern and more practical approach for public plantings.

So how do we end up at the traffic islands filled with tussock or the motorway sidings of utility clumpy plants? Take the simpler blocks of colour planting done by Tom Stuart-Smith. Eliminate any plants that are pink flowered (not fashionable), anything that is deciduous (need foliage 12 months of the year), anything that is grown more for its flowers than its foliage, anything that requires more than a very occasional clean up. You are left with reliable, utility, evergreen clumping perennials which in recent years have become the repertoire of many landscapers for mass plantings – the liriopes, mondo grass, ligularia type of plant. Now reduce the range further. Take out any plants which are less than 30cm high, any plants which require good soil conditions or shelter, any plants which look sufficiently desirable to be stolen, and any plants which are not available dirt cheap and preferably from a native plant supplier or prison nursery. You are left with mostly tough grassy type plants which on their own are as dull as ditchwater. It is the end of the road.

English Summer Gardens – Part 3

We went to England to look at summer gardens which are all about flowers, particularly perennials and annuals. We didn’t expect to see so many meadow gardens and nor did we have the perspective of the summer garden as a continuum.

At one end, we saw natural wildflower fields, grazed by sheep and not managed as gardens at all. There are two key aspects to understanding British meadows. One is that many of our weeds in this country are in fact wildflowers in their home environment. So what might be seen as a rank, unloved and weedy infestation of dandelions, stinging nettle, daisies, convolvulus and blackberry is an entirely appropriate and acceptable meadow garden in its natural setting. Add in other elements such as cowslips and wild orchids (dactylorhizas and anacamptis pyramidalus) and you have something altogether delightful. The second aspect is that wild flowers thrive in a climate that is cold enough to stop all growth in winter and dry enough to stunt most growth in summer. These are hardly typical Taranaki conditions.

Inch along the continuum and you discover managed meadow gardens which were integral to most of the large gardens we visited. The late Christopher Lloyd of Great Dixter was an influential figure in popularising and enriching the meadow garden genre by encouraging a wider range of wild flowers to naturalise. The general rule of thumb for managing meadow gardens is to cut the meadow down in August (the equivalent of February or March in our hemisphere) and to leave it lying for about three weeks. This allows the seed to distribute. The hay is then raked off the meadow in order to keep the fertility low. If the soil is too rich, the growth becomes rampant and grasses will dominate. The existence of a parasitic annual referred to as Yellow Rattle (Rhinanthus major) helps to keep the grasses weakened.

Meadow gardens appeal to the romantic and naturalistic instinct cherished by the English. It is not seen at all as scruffy or unkempt and it is fine to have a designated meadow area as your main point of entry to the garden. The naturalism is often combined effectively with that most prim and proper of all gardening techniques – topiary. Great Dixter does it – the large clipped yew shapes created by Lloyd Senior now stand in the midst of an informal meadow. At Helmingham Hall in East Anglia, an undulating wave of pathway is cut through meadow grasses which surround large clipped yew domes.

I don’t see many New Zealand gardeners managing this meadow genre. Our soil fertility is too high, our grasses grow too strongly and will choke out most competition, our torrential rains will flatten meadows even in summer and if the rain doesn’t do it first, then winds will. Our nitrogen levels are too high. And we tend to be a bit anally retentive and suburban, dedicated to manicured lawns and edges, let alone to glyphosate, to tolerate the casual live and let live philosophy of the meadow.

Take another step along the continuum and there is the completely contrived and totally enchanting field of flowers (without grasses). We saw this done at East Ruston Old Vicarage Garden where the field of yellow daisies had hints of blue cornflowers and red soldier poppies and it was so perfect that it took our breath away. If you start with bare earth, in the first season there are no competing grasses or weeds so all that is seen are the desired annuals. By the second season, competing plants mean that you are closer to the managed meadow situation.

Contrived but charming field of flowers at East Ruston Old Vicarage

Contrived but charming field of flowers at East Ruston Old Vicarage

We are now moving into a style of gardening which has a debt to the North American prairies and the prairie meadow style reaches a pinnacle at Wisley Gardens where Professor James Hitchmough from the University of Sheffield is responsible for one of the most delightful meadow gardens of perennial flowers that you will ever see. Apparently the inspiration was Missouri meadows but the execution of the vision was achieved with gardening skills. The brief included a requirement that this garden be easily managed by Wisley staff so it went in to an area which had been cleared of weeds and grasses and probably also cleared of much of its topsoil. A rope mesh mat was laid, allowing the plants to stay anchored and a carefully chosen palette of about ten plants from seed mixed with sawdust was sown to create a sea of perennial flowers. There wasn’t a lot of foliage evident and the plants were tough performers which thrived in hard, dry conditions. It was magic. It was also in its second season already and there was no evidence of weed or grass contamination although it must be said this is managed with some ongoing minor intervention.

The Missouri meadow garden at Wisley

The Missouri meadow garden at Wisley

Move along the continuum further and you get to the classic cottage garden style which the English made their own. Cottage gardening is an indulgence of self seeded annuals and perennials, usually combined with roses, along with other shrubs and climbers such as clematis. The effect is a riot of colour and flowers with nothing so contrived as colour toned borders or stage managed plant combinations. Plants should look as if they are growing naturally where the seed falls and hard landscaping takes a back seat in this informal, romantic look. Readers who know the Armstrong’s garden in Waitara will have seen a rare local example of this gardening genre. If you have yet to visit, go and see it this Rhododendron Festival. Alathea Armstrong has it peaking to perfection for that week and it is very pretty, albeit labour intensive.

But take another step along and you come to what I call the managed cottage garden look which I associate with English gardeners such as Rosemary Verey and Penelope Hobhouse. The romantic naturalism is now combined with hard landscaping, form and formality. It is much more controlled, as can be seen in the Hobhouse Country Garden at Wisley. Colour toning becomes a major factor. Deadheading becomes intensive in order to prolong the display. Planning for successional flowering from spring to autumn is important. Constant management means spent plants are cut back and holes are plugged by bringing in fresh potted colour from out the back somewhere. Weed management becomes more critical. Many of the plants need staking. We talked to Lady Xa Tollemarche at Helmingham Hall about her borders and she manages to keep them at a peak for several months. The English do this classic garden style so well but it is not for the home gardener who sees spending every spare minute in the garden as a form of slavery. Easy care and low maintenance, I think not.

The classic Hobhouse country garden at Wisley

The classic Hobhouse country garden at Wisley

We are, dear Reader, only half way along the continuum. How silly of me to think I could summarise all we saw and talked about in 1200 words. We need to pause in the middle before moving on next instalment through the mixed border a la Christopher Lloyd, the sweeps of herbaceous colour softening formal landscaping in the style made famous by the Lutyens-Jekyll partnership, moving through the classic and intensive long borders to the recent work of Piet Oudolf and Tom Stuart Smith and onwards to the modern minimalism of mass planting. There is still quite some distance to go and any number of points where thinking gardeners can hop off the continuum, comfortable that they have found the point that best suits their situation.

English summer gardens – part 2

The delphinium trials at Wisley - yes these are creamy yellow

The delphinium trials at Wisley - yes these are creamy yellow

When I packed for our English trip, I packed for an early English summer. That is to say that I anticipated a temperature range in the vicinity of 12⁰ to 22⁰. Not 32⁰ which is what we ended up in – soaring even higher as we crawled the M25 in a car which was not air conditioned.

England is generally regarded as a moderate maritime climate, lacking extremes experienced by inland continental areas. But as we looked at extensive snow damage to large conifers at Hidcote Garden in Gloucestershire, bone dry conditions in East Anglia and Surrey where the annual rainfall is a mere third of what we get here and thin, poor soils on top of chalk in many areas, it made our conditions look easy. And bunny rabbits may be native to England, but it does not make them any easier to cope with. We have been complaining about a minor population explosion at home but believe me, it is nothing to what we saw over there. Super bunny is fearless and everywhere, grazing at will. Pretty well all plantings outside urban areas need rabbit protection. Even hedgerow plants all went inside individual plastic sleeves. Add in voracious grey squirrels, invisible but destructive moles, badgers who insist on excavating their own version of the Clyde dam, marauding foxes and various birds of prey. At times, nature seemed rather more savage in that well tamed country than we expected.

Over a period of a couple of weeks, we visited about 30 gardens. By the end of that, we felt we had a reasonable grip on a range of gardening practices particularly with regard to herbaceous plantings but you will have to wait for my next column for any analysis. While I blithely deny jet lag, the brain is still a little woolly. So this week is edited highlights, Hidcote, Beth Chatto Gardens and Wisley.

“Go to Hidcote,” urged our Oakura friend and colleague, Glyn Church, “it is my all time favourite garden.” Having been ever so slightly disappointed in most of the Cornish private gardens we had seen, we headed up to Gloucestershire and hoped Glyn was right. He was. Hidcote was quite simply everything to which we aspire.

I have gone on record before saying that there are measurable and definable standards for gardens. That whether you or I like a garden is a matter of personal taste but whether it is a very good garden is not just opinion. Hidcote excelled across the board. It was very well planted, it was managed with sensitivity, it showed excellent design and structure, the maintenance was top quality. But more than that, for us Hidcote was on a scale we can relate to (it is a defined 10 acre garden) and quite simply, it set the standard for the genre that we like. It was the complete, all round domestic garden. To visit it was gardening nirvana.

Apparently Hidcote has not always attained this standard in recent years and it is nearing the end of a £3 million makeover (yes, that is three million UK pounds) so it should be looking good. And with about 10 qualified gardeners on the staff, the skilled labour component is well beyond what we can ever hope to reach. It is owned by the National Trust and it must be a flagship for quality management of what was a private garden created on a domestic scale (narrow paths and entranceways) now coping with very large visitor numbers. But the garden has not lost the intimacy or detail that defines a private vision. It was one of the early Arts and Crafts gardens, using rooms or defined spaces to mark changes of atmosphere and plant types. Photos are all very well, but to actually visit was to experience the gifted use of vistas, borrowed views, green rest areas between busy plantings, different types of plantings and all the other layers that go together to make a brilliant garden. The red mixed border was terrific. We walked out after several hours like stunned mullets.

The famed Beth Chatto gardens in Essex on the same site where she has gardened for many decades. We were privileged to have close to half an hour with her personally taking us around part of the garden and although she is now elderly, she has lost none of her mental sharpness and still appears to be very active managing what is now a pretty massive machine in terms of large, intensive garden, nursery, tea rooms and a constant flow of visitors. Beth Chatto is synonymous with perennials, both as a writer and a gardener. Her reputation is such that even my late mother (who died several years ago at an advanced age herself) always regarded Mrs Chatto as The Expert. And her gardens were so good that we had to go around twice, once going one way and then in reverse. Decades of intensive skilled gardening show in plant composition, plant health and management. Putting together combinations which are eyecatching and effective even without any flowers is not easy with perennials. Avoiding the scruffiness which can come with herbaceous material past its peak, keeping very tight weed management and restricting the movement of invasive wanderers, stopping it all looking the same – there was so much to learn from these gardens. It is not as if there was much hard landscaping and I can’t recall garden ornaments or sculptures – this was a brilliant garden that was all about plants and plant combinations.

Wisley was our third garden that provided a completely satisfying experience. It is the flagship for the Royal Horticulture Society – over two hundred acres of property encompassing pretty well every aspect of gardening that you are ever likely to encounter. Its scale is astounding and so is its quality. It must surely rank up amongst the very top public gardens in the world.

We were in the extraordinary position of having access to Wisley out of hours, after the thousands of visitors had gone home. Wisley is not just about plant collections and public gardens. It has a strong educative and comparative research function and to this end they have display frames of all fruit trees that they can grow, including different cultivars. We were worried that nobody appeared to be sufficiently rigorous with the assessment trials of the ripe cherries in particular, as well as the berry fruits. Left alone in the gardens, we spent some time working out how to gain entry to various netted cages but decided it would be all too embarrassing to be caught stealing fruit so we had to settle for the pieces we could wheedle out through the protective layers which reduced the efficacy of our assessments.

What Wisley showed us (besides the fact that stolen fruit does not always taste the best – Mark encountered the sour Morello cherries) was a whole range of different approaches to herbaceous gardening with examples by a number of different designers over a period of years, including very modern plantings around the new glasshouse. It gave us a series of reference points for what we now think is a continuum stretching from wild flower meadows through a range of styles and eras to an end point of herbaceous plantings best characterised by the massed utility grasses on motorway embankments. And for our thoughts on that, you will need to wait another fortnight.

Mark takes responsibility for the after hours cherry trials

Mark takes responsibility for the after hours cherry trials