Category Archives: Abbie’s column

Abbie’s newspaper columns

‘Editing’ the plants for a lower maintenance garden

A few years ago. It is amazing how much the skyline of trees has changed since. My feet.

A few years ago. It is amazing how much the skyline of trees has changed since. My feet.

Editing, dear New Zealand readers. Cleaning up the borders and beds is often about editing the plantings.  I know this because I read a certain amount of British garden media.

I have certainly been editing the plantings in the gardens around our swimming pool. It seemed a good summer occupation and on a few hot days this week, the flow between gardening and cooling off in the pool has been excellent.

The gardens were put in when we built the pool in the late 1990s and, in that clichéd way, we naturally opted for a sort of tropical feel. It was never thought out very well at the time. In the years since, I recall doing one relatively major rejig of the gardens but beyond that, they have only had the most perfunctory of care and minimal maintenance. This often included plugging gaps with whatever I had to hand.  And it was showing that lack of attention.

I am a more thoughtful gardener than I used to be. I think that comes with experience. Knowing that we were unlikely maintain a pristine swimming pool, we had chosen from the start not to make it a key landscape feature but rather to site it discreetly where it is largely out of view. I am not keen on garish blue pools taking centre stage so ours is also a modest dark grey and we went with a black pool cover.

Curculigo, euphorbia and Ligularia reniformis, lush enough to pretend to be tropical and low maintenance

Curculigo, euphorbia and Ligularia reniformis, lush enough to pretend to be tropical and low maintenance

The upshot of this is that I figured we want a really low maintenance approach to the gardens around the pool and that it should be specifically targeted to the swimming season – which for us is mid to late December through to mid February. There is no point in putting in plants that flower outside that time because we won’t see them. Extreme editing was called for to eliminate my previous efforts to plug gaps and add seasonal interest with assorted perennials and bulbs.

I am quite happy with the earlier effort blocking up the Ligularia reniformis with Curculigo recurvata (nice foliage contrast and happily co-existing). We removed all but one of the damn dangerous euphorbia (E. mellifera, I think) which seeds far too freely and has disappointingly insignificant flowers but compensates with good form and foliage. Ligularia reniformis is getting to be a cliché in New Zealand gardens and I will restrict how widely we use it elsewhere in the garden, but it is very handsome and lush here, reaching well over a metre in height. However, the compact red dahlia hybrid will have to go. Not our style. Too suburban in our context.

Pachystegia insignis in the foreground, Xeronema callistemon behind and overhead a large Aloe bainseii

Pachystegia insignis in the foreground, Xeronema callistemon behind and overhead a large Aloe bainseii

The Pachystegia insignis (Marlborough rock daisy)  and Xeronema callistemon (Poor Knights lily)  flower outside the summer season entirely but these native plants are not the easiest to grow in our environment and the plants are handsome and well established with good foliage contrast. Besides, it is not in our nature to edit our plantings down to a simplistic mass.

IMG_6956It is the next ten square metres or so where I have gone for a block planting. It was a mish-mash. No longer. I chose to use two common plants – the pretty but tough Dietes grandiflora and black taro. At least we know it as black taro but I am not sure if it is a colocasia (in which case it may be ‘Black Magic’) or an alocasia.  It looks very new and raw at this stage, but I expect it to be a pleasing combination with plenty of pretty flowers next summer and good foliage interest. And low maintenance, without looking like a supermarket carpark.

Patience is a virtue. The freshly planted dietes and black taro.

Patience is a virtue. The freshly planted dietes and black taro.

I see some debate in garden media about whether digging and dividing perennials is necessary. Many folk seem to dread and shun digging – hence the no-dig craze for vegetable gardens. All I can say is that since I started doing a lot more digging and dividing, the garden looks hugely better for these efforts and the perennial plants thrive in more friable conditions with less soil compaction. It is also a learning experience as I experiment with plant combinations and think through the seasonal effects. It is a whole lot more interesting than mere garden maintenance and gives an opportunity to review and edit the plant selections. And it doesn’t even cost any money because I am working with plants already in the garden. There is nothing to fear from increasing the dig and divide regime.

IMG_6892And for those of you who don’t follow the garden Facebook page, I offer you my little study in dietes blooms. It makes no logical sense to float them in water, because they are not damp-loving plants at all. I just thought they would look charming, and they did – first in the swimming pool and then I gathered them all (slightly battered) to float them in the stream. Because I could.

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On the verges

Agapanthus with the dreaded convolvus - the latter is pretty in flower but we do not need it

Agapanthus with the dreaded convolvus – the latter is pretty in flower but we do not need it

As you drive around the countryside in January, ponder this: does a sprayed roadside with dead grass and roadside litter look better than wildflowers? And are garden escapes (which takes in most roadside plants and flowers) environmentally worse than repeated application of weedkiller? Maybe it is time we reviewed our attitude to weeds.

It is often said that a weed is simply a plant in the wrong place, though I see Sara Stein is attributed with the extended statement, “A weed is a plant that is not only in the wrong place, but intends to stay.” After all, even weeds are native to somewhere and one country’s treasure can be another country’s problem.

Toetoe beside the new Waikato expressway

Toetoe beside the new Waikato expressway

A disclaimer first: our native bush and forest are precious and vulnerable to takeover by invasive and aggressive imports. We do not need another old man’s beard (Clematis vitalba) and perish the thought that Japanese knotweed (Fallopia japonica) ever gets a major foothold here. If you are lucky enough to live adjacent to near-pristine native bush, that brings an obligation to be very careful with what escapes your property and colonises roadsides. It also behoves us all to have some awareness of what is on our Regional Council banned and watch lists.

But most of us live in heavily modified environments and I suspect a preference for weedkiller over wildflowers arose from our farming heritage and feeling of obligation that “weeds” should not be permitted to invade precious farmland. Nowadays, when farming has become much more industrialised – a green desert, often, lacking even shelter belts – based entirely on imported grass and feed species, I don’t think that argument holds.

The ugliness of the sprayed  verge

The ugliness of the sprayed verge

Each time we visit Britain, we are entranced by their hedgerows and natural roadside vegetation. Apparently, after major clearance in decades past, there came an awareness that hedgerows contribute a great deal to the eco-system and grants were made available to reinstate them. There is not widespread mowing of road verges, let alone the ugliness of spraying. Would that we had such an enlightened attitude here. In vain do we protest that repeated spraying creates a vacuum into which unwanted weeds move first (notably the invasive, yellow bristle grass in Tikorangi), but it also prevents the ground from absorbing rainfall. Instead, the surface water is funnelled down drainage ditches, washing with it weed spray and any petrol residue from the road into waterways. How much better to have a growing roadside which filters the run-off?

Crocosmia - weed or woldflower?

Crocosmia – weed or woldflower?

Roadside vegetation is more interesting visually too, offering flowers and seasonal colour. Add to that a wildlife corridor role and we argue that they can make a significant contribution to a healthy environment. If you are worried about using imported ornamentals, you can encourage native re-vegetation. The native plantings alongside the new Waikato Expressway feature an abundance of toetoe which is wonderfully sculptural and interesting, especially silhouetted against the sky.

But we like the random mix of plants and colours we see. I look for the point where wild hydrangeas on the Otorohanga bypass change from blue tones to pink tones. I guess that marks the transition to limestone country. All our hydrangeas in Taranaki are blue as blue and they thrive on roadsides in a climate where we get summer rainfall.

005The white Japanese anemones that flower in the long grass around the country corner where we live make me smile every autumn. Orange-red crocosmia – earlier referred to as montbretia – feature large around here. So too do red hot pokers, fennel, arum lilies and cannas while further north the ox-eye daises, yellow vetch and wild carrot feature more.

012And agapanthus. There is a plant that is a great deal more revered overseas than here. It is controversial, actively discouraged and some forms banned in northern regions. Some folk hate it with a passion and it cannot be sprayed out with glyphosate. But truly, our roadsides round here would be the poorer without the summer display. In its defence, we have not seen this tough plant seed down any great distance from its parent in our conditions and it is also very good at stabilising clay banks.

I recall two English garden visitors a few years ago who asked what were the “giant bluebell and what looks like a lace-cap yellow hydrangea” flowering on all our roadsides. The yellow lace-cap was fennel but the giant bluebell had me absolutely stumped until I next drove out. It immediately dawned on me that they were referring to agapanthus. It is not cold-hardy in large parts of Europe and the UK and is a prized garden plant. No wonder they failed to identify it growing wild in abundance here.

abbie 20 10 2015 copy

Fennel, not lace cap hydrangea

Fennel, not lace cap hydrangea

First published in the January issue of New Zealand Gardener. 

Bridge crossings – sometimes over water

001Monet’s garden in Giverny has probably given us the most recognisable garden bridges – gently arching in form and painted. While originally Japanese in inspiration, Monet gets all the credit these days.

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Around the world, there must be thousands of Monet-inspired bridges adorning private gardens, though I am not 100% sure that starting with a flat bridge structure and adjusting the decking angles in the second bridge above is totally successful. These two at least have a purpose in traversing a ditch and a stream respectively.

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These two bridges are pure, unabashed ornamentation. There is no functional need for bridges in either situation. The blue one is in Yorkshire, the green version was in my local town of Waitara. I use the past tense because it has now been removed because it became structurally unsound.

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Paloma Garden near Wanganui has a major bridge crossing a large body of water but I do not appear to have photographed it in its full span of glory. In this situation, the bridge not only provides access, but also makes a large visual statement.

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And our own bridge in our park, wreathed in wisterias, has been compared by others to Monet’s bridges, though that was not in our minds at the time it was constructed. Its framework was built using an old truck chassis, for those who are interested in engineering details. While we have to replace the odd decking board from time to time, the galvanised, underpinning structure has remained sound over the past 20 years. We have never painted it and never intend to paint it. I couldn’t help but notice the immaculate paintwork on Monet’s bridges but that is in a drier climate and in a garden maintained by a small army of staff. We have so much moss and lichen growth in our conditions that paint is problematic. We prefer the natural look to tatty paintwork.

Castle Howard Away from the domesticity of Monet-style, I photographed this handsome, apparently disused bridge at Castle Howard in Yorkshire. What a handsome landscape feature it is, though I failed to find out the story behind its construction.

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Gresgarth Hall, the garden of Arabella Lennox-Boyd, takes a practical, level bridge construction across a stream and gives it flair with curved stone steps and ramparts. There is nothing like stone as a building material to give solidity, permanence and grace to a garden.

DSC02016 We have a small stone bridge in our park, modest in scale though perfectly functional and gently permanent in its visual appeal. Mostly Te Popo 107

Some folk face more challenges than others when it comes to bridges. This swing bridge is in Te Popo Garden near Stratford where it spans a deep gorge. This is a situation where safety and functionality are paramount but I also like the unadorned honesty and lack of pretension of this bridge in the large woodland garden.

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At the simplest end of the spectrum, we have also used board bridges in our park. That is my photo-bombing Dudley dog on a bridge which exists solely to get the lawnmower from one side of the stream to the other. These crossings are perfectly sound and stable for foot traffic, but they do not pretend to be anything other than utility in purpose.

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In the area we call the North Garden, or the wild North Garden, there will eventually be log bridges across the ponds. Maybe. When clearing the area and creating the ponds, Mark had two dead trees relocated to bridge the water. The plan has always been to chainsaw the top of the logs reasonably level to get an easier walking surface and to add side rails. It just hasn’t happened yet because we have not yet opened this area to the public. It is another naturalistic- style of bridging water which is pleasing to our eyes while also being an inexpensive option.

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Finally, when it comes to bridges, I would not want this in my own garden but what a beautiful bridge it is on the walkway in New Plymouth. Evoking the breakers of the adjacent ocean, it frames our iconic mountain.

Out and about today

The writing muse has forsaken me in recent weeks, hence the absence of new posts. Truth is, I have been gardening instead. But a trip to town today, camera in hand, made me focus my attention beyond the immediate confines of the garden. The purpose of the trip was dull enough – food – so I will ignore that.

IMG_6363IMG_6369I have been meaning to stop and photograph this watsonia growing wild down the road. Mark tells me it is a species but I have yet to put a name on it. The dusky apricot colouring appeals to me. Some may call these weeds but oh, when I compare these roadside plants to the ugliness and environmental unfriendliness of scorched, sprayed earth, all I can say is give me these weeds which make a contribution to the eco-system. It is such folly to think that spraying roadsides is desirable. All it does is to create a vacuum where less desirable weeds will re-colonise the area and, in the interim, all the water flows away, washing residual spray and road residues into our waterways. My column in the January issue of NZ Gardener is on the topic of roadside plantings. We often talk about this as we drive and we despair at the ugliness and the willy nilly use of weed spray in this country of ours. Clean and green New Zealand? Not in reality.

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IMG_6381More cheerfully, the so-called Australian frangipani (Hymenosporum flavum) growing by the road halfway to town has been delighting me for several weeks. Many flowering trees are glorious on their day – but you can count their flowering season in days, rather than weeks. Not so this hymenosporum. It is not even a close relative of the frangipani, though it is scented. It needs frost free conditions to get established and good drainage but is worth growing for its late spring, early summer blooming.

IMG_6384IMG_6390I don’t swear on this blog (though I admit I am not so restrained in real life) so you will just have to fill in the missing letters when I describe this as an example of f*** off utility urban design. Clearly nobody wants to even try and grow plants here (and conditions would certainly be difficult to get anything established, let alone looking good), but could nobody come up with a filler idea that was less hostile than this?

IMG_7230I much prefer the old concrete and stone wall, constructed a long time ago in my local town of Waitara. Someone took a lot of care over this.

IMG_6400Pohutukawa! Often called the New Zealand Christmas tree. What a wonderful sight they are at this time of the year. As I looked at all the trees coming into bloom along New Plymouth’s water front, a mere two short blocks down from the main street, I felt a pang at the loss of 28 (or was it 29 in the end?) mature trees beside our Waitara River. I even contemplated making Christmas cards for all our Taranaki Regional Council elected officials and senior staff who were responsible for the casual removal of the trees. I thought it could feature the flowers on the front with a message inside saying “Seasons Greetings from the 29 Waitara pohutukawa chainsawed down this year”. But it is a lot of effort to go to for something they would just throw in the bin. Better instead to admire the beauty of trees still standing.

IMG_6401The public amenity planting in New Plymouth can be delightful and appropriate. On the exposed west coast, there are limited plant options that will grow right beside the sea. That is why the sturdy pohutukawa is so important. But also our native flaxes. They are in flower and how lovely do the flower spikes look silhouetted against the big sky and the big sea we get here?

IMG_6372Finally, coming home, I stopped to record the effective trimming of this Cupressus leylandii down the road. It was just an ordinary shelter belt until the lower canopy was recently lifted, exposing the trunks. The fact the branches have been trimmed reasonably flush helps but it adds a whole new dimension, being able to look through. It has turned an unmemorable shelter belt into something much more graceful and distinctive.

The curious arisaemas

Delighted by A. dahaiense

Delighted by A. dahaiense

Not all flowers are beautiful, but my goodness arisaemas have curious flowers and equally peculiar propensities.

Arisaema ringens has been around New Zealand gardens for a long time – sometimes called Jack-in-the-pulpit though that is more correctly used for the American species, A. triphyllum. While A. ringens has handsome, glossy foliage, the flowers hide beneath in such seclusion that you are likely to miss them entirely.

The last twenty years have seen an influx of new Asian and Japanese species to the country, many of which have piqued the interest of collectors. Even now, the choicest ones are difficult to source – often more a case of who you know rather than where you can buy them. And if you get hold of them, some are very difficult to keep going, especially in garden conditions as opposed to nursery pots.

Arisaema tortuosum

Arisaema tortuosum

Not all are devilishly difficult. A. tortuosum is easy and will seed down freely, a bit too freely, we find.  It makes a big patch, maybe 75cm tall, with the green hooded flowers sitting above the foliage. We find it is perfectly happy in the border right beside the house on the eastern side where the only water it gets is run off from the adjacent path.

Arisaema speciosum

Arisaema speciosum

A. speciosum is another easy variety in semi shade. It has handsome foliage, lovely mottled stems and curious flowers in burgundy-brown that really do look like hooded cobras. But the issue is that the flowers are held beneath the foliage so unless they are planted on a slope or on a margin where you can see into the patch, you may miss the flowering season. The early summer blooming A. candidissimum is one of the prettiest forms and is not difficult to grow with its palest pink and white hooded blooms appearing before the foliage dominates. It also multiples well.

Mark's A. sikkokianum hybrids

Mark’s A. sikkokianum hybrids

Mark's sikokianum hybrids (3) - CopyAnd then there are the tricksy ones, few more so than the Japanese A. sikokianum with its phallic spadix and hooded spathe rising prominently above the foliage. It is a show stopper in spring, though definitely curious rather than beautiful. After many years of growing it, I can tell you that it is difficult. We have never seen it increase from the corm. Growing well, it will set seed but these need to be raised in controlled conditions because it will not seed down naturally here. Even then, the patches tend to get smaller with time, rather than larger. It was for this reason that Mark experimented with hybridising it, to try and get increased vigour. This is known as hybrid vigour, in a similar way that the controlled breeding of designer dogs can make the offspring a stronger genetic strain than the highly refined parentage of pure breds. It has worked for us. The offspring carry all the best characteristics of A. sikokianum but they grow more strongly and are reliable as garden plants. Few would pick the difference to the lead species, but we know they are actually hybrids.

Arisaema dahaiense

Arisaema dahaiense

For sheer bizarre appearance, the more recent acquisition of A. dahaiense has to take the cake. It is very peculiar and not a carnivorous plant, though it looks as if it should be. The mottled, frilly flange is particularly striking. Because we are gardeners rather than plant collectors, the fact that this large-flowered curiosity has settled down quite happily in the leaf litter of open woodland conditions is a real bonus.

Peculiar propensities?  Arisaemas are hermaphrodites. When they are young or growing weakly, they are male. Only when conditions are right and the plant is strong, do they become female and therefore capable of reproduction. Then if they need a wee rest, maybe after a season of prolific seed set or drought, they revert to male again. Is this a metaphor for the human condition, some may wonder. I could not possibly comment.

A. taiwanense seed

A. taiwanense seed

If you notice a vague visual similarity to the mouse plant (Arisarum proboscidium), the striped Arisarum vulgare or arum lilies you are correct. Though not close relatives, they are all aroids in the Araceae plant family. Arisaemas go dormant in late summer and grow from corms – often roundish balls or larger round discs, though speciosum corms can look more like something unfortunate that the dog has left behind. Some species set copious amounts of seed which can be attractive in itself in autumn, though it helps to know your species. I remove the tortuosum seed because it can spread too freely whereas the speciosum seed, while abundant, has not created problems for us.

If you really want to know more about this plant genus, the gold standard reference is currently still a book, a proper book, not the internet – “The Genus Arisaema” by Guy and Liliane Gusman.

Arisaema candidissimum

Arisaema candidissimum

010 - CopyFirst published in the December issue of NZ Gardener and reprinted here with their permission.