Tag Archives: gardening

Garden lore

“In the plan of human conduct there is a marked difference between the mind which sees beauty in a simple violet and that which sees it in a pompous rose or dahlia. On the one hand we have a love for the free and untampered flowers of God’s creation, on the other hand for a flower of social ills, sophistication and conceit.”

Jens Jensen , Siftings (1939).

The aphid infestation on old hellebore leaves

The aphid infestation on old hellebore leaves

Hellebores in autumn Hellebores are one of the easiest care perennials there is, but even the most common H. orientalis benefits from a bit of seasonal grooming. I dead head in spring to stop excessive seeding and because the spent flowers can get heavily infested with aphids. By autumn, the foliage can be infested too. There are the tiny white tufty aphids and a whole lot of sooty residue which is the result of their honey dew excretions. I am going through now removing most of the old foliage. It looks a little bare until the fresh leaves and flowers appear, but it means the nodding blooms are much more visible and the new foliage is much prettier, while reducing the aphid infestations. Auckland plantsman, Terry Hatch, once told me he puts the lawnmower over his hellebore patches. I do it by hand with snips. I also remove the abundant fresh seedlings. A blanket of compost tidies up the area afterwards and feeds the plants. Timing is everything. If you leave the trimming too late, you have to work around each emerging flower and new leaf which makes it a fiddly job.

First published in the Waikato Times and reprinted here with their permission.

Plant Collector: tree dahlias

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The only resemblance these dahlias have to trees lies is in the astonishing size they can reach in the space of the summer growing season. Some can get up above 3 metres high. They are just dahlias, growing from the usual tuberous roots and because they are deciduous, they die back completely every year. The best known tree dahlia is the species D.imperialis which is also the largest variety and hails from Central America. Prominent NZ plant breeder, Dr Keith Hammett, has been working with dahlias over time and using other so-called tree dahlia species in ever more complex crosses to bring different colours, flower form and sometimes more compact growth into the range.
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Tree dahlias are not the easiest plants to place in the garden. They need full sun and protection from wind because their growth is somewhat brittle. They also need some sort of support to hold them upright. They flower now, in mid to late autumn, much later than the summer dahlias and this makes them vulnerable to early frosts. If you have the right conditions, plenty of space and are willing to build some sort of structure to support them (we are fans of thick bamboo corrals), they can be a welcome addition to the autumn garden but they are never going to be tidy, well behaved plants.

Reasonably sure this is the one named Timothy Hammett

Reasonably sure this is the one named Timothy Hammett

First published in the Waikato Times and reprinted here with their permission.

Garden lore

“If you wish to be happy for a day, get drunk;
If you wish to be happy for a week, kill a pig;
If you wish to be happy for a month, get married;
If you wish to happy for ever and ever, make a garden.”
Chinese proverb

The phlomis age quite gracefully....

The phlomis age quite gracefully….

The autumn garden clean up

There are two schools of thought as to when one should be cutting back the summer perennials. The higher moral ground belongs to those who advocate leaving them all standing until early spring in order to feed the birds over winter. I feel slightly defensive about being out there cutting and clearing as part of the autumn garden clean up. Does this mean I am depriving the ornithological population of much needed winter sustenance?

...which is more than can be said for the messy sedums

…which is more than can be said for the messy sedums

Well, yes and no. I suspect the advice derives from much colder climates where gardens are put to bed for winter and our feathered friends have a much tougher time. Here, where we have growth all year round, albeit much slower in winter, the birds do not have problems with lack of winter feed. And so many of those summer perennials are downright scruffy and unattractive now. It is one thing to leave plants like the phlomis which has attractive, upright seedheads and tidy rosettes of foliage but the sedums and asters flopping all over the place are not things of beauty. I cut and clear now, often thinning clumps as part of that process. If you do a garden tidy round now, you can get a blanket of mulch on and the garden stays looking remarkably neat until it rushes back into growth in spring.

First published in the Waikato Times and reprinted here with their permission.

Magnolia – Michelia: the evergreens

Just another Magnolia laevifolia (syn Michelia yunnanensis) selection but in this case it is our selection which we called Honey Velvet

Just another Magnolia laevifolia (syn Michelia yunnanensis) selection but in this case it is our selection which we called Honey Velvet

I was surprised this week to have someone ask me what michelias are. I realised I have never written about them in a general sense. That is because I try and separate my published garden writing from our commercial interests and michelias are inextricably bound up with the latter.

Michelias are in fact a type of magnolia. They used to be seen as close relatives to magnolias, now they have been reclassified botanically as magnolias and this has involved a complete name change for some species.

Mention evergreen magnolias and most people think of the grandifloras from the southern states of USA. All readers will know these by sight, if not by name. They have big, tough, leathery leaves and they flower in summer with large creamy white blooms.

Personally, I am not a big fan of the grandifloras. They make big, chunky trees which are remarkably tolerant of harsh weather conditions. As such they have their place but I think that place is on golf courses and cemeteries. There is a row of them as you exit Huntly to the south and I am pretty sure they are on the edge of a cemetery.

Why am I not keen on them? They don’t mass flower, for one thing. In fact the flowering is generally random and intermittent. I find them a bit chunky in the landscape and if one is going to go chunky, I would rather have our native puka. The leaves are really tough and take forever to decompose.

That said, the varieties with deep velvety brown indumentums (the furry coating on the underneath of the leaf) can look attractive in the wind. Magnolia grandiflora “Little Gem” is a tough plant with exceptionally dark forest green leaves contrasting with cinnamon indumentum and is much favoured in modern gardens. Just be aware that it is only a little gem as opposed to an extremely giant gem. It will still get quite large over time and you will never get many flowers on it.

Fairy Magnolia Blush - bringing pink into the range

Fairy Magnolia Blush – bringing pink into the range

Michelias are very different. Their foliage is smaller and much lighter in substance so they are not an oppressive plant. And they can flower and flower because they set flower buds down the stem at nearly every leaf axel, not just on the tips. Most of them peak in spring but some keep on flowering for months on end and some will have a second blooming in summer.

There are a few michelias that are widely available here. M. figo has long been referred to as the port wine magnolia and many gardeners will know it. It has small leaves and is inclined to go a bit yellow in full sun. When it starts pushing out its scent in late afternoon, it smells remarkably like Juicy Fruit chewing gum.

There are various forms of doltsopa, the most common in this country being “Silver Cloud”. It has wonderfully large, pure cream blooms which are very fragrant. But, there are always buts, the flowers are floppy and often get frosted in colder areas, the tree tends to drop most of its leaves after flowering and it gets rather larger than most people expect. M. maudiae is a better bet as a garden tree but difficult to propagate so not generally available.

What we used to know as Michelia yunnanensis is certainly a popular addition to the garden plants of this country. It had a brief flirtation with being called Magnolia dianica before its current name was settled upon. It is now correctly known as Magnolia laevifolia but you are still more likely to find it sold as M. yunnanensis. It sets seed really freely so just about every nursery around the country has made a selection and named it (including us!). You can recognise it by its small leaves and creamy cup shaped blooms. You can hedge it and clip it but it is easier to start with a variety which is more generous in the leafage department.

Several decades ago, the late Northland plant breeder Os Blumhardt released Bubbles and Mixed Up Miss onto the market and these hybrids had many advantages over the species as garden plants. They are still tidy plants when juvenile, but nothing remarkable as they mature.

Now there is an explosion of new michelias on the market. Many are just the aforementioned M.laevifolia selections. Some are hybrids. I must declare an interest here. The ones you see being marketed as “Fairy Magnolias” are ours. For we are in the midst of a longstanding love affair with the michelias.

When camellia petal blight first showed up, my plant breeding husband immediately abandoned camellias and started on michelias. After about 17 years we have many, probably into the 1000s by now but we have never counted, as he has pursued breeding goals. They are in shelter belts, hedges, around the garden, through the nursery areas – anywhere there is space. Fairy Magnolia Blush was the first release a few years ago, bringing pink into the colour range. Cream and White are being released this year.

What we love about michelias is their versatility. They can be clipped tightly, even in topiaries. They make good hedges, even pleached into hedges on stilts. Some can become specimen trees without being forest giants. They give us masses of flowers, many are scented and they are pretty much free of all pests and diseases. They are an all round useful plant family.

We would not be without them.

Our new star - Fairy Magnolia White to be released this year

Our new star – Fairy Magnolia White to be released this year

First published in the Waikato Times and reprinted here with their permission.

Out of the box

1While we like the odd bit of sharply clipped hedging – which is essentially a green wall – we have never been big fans of buxus. In fact we have both been known to scoff at it as possibly the world’s most boring and over-used plant. A few years ago when buxus blight first appeared in this country, we made plans and built up some camellia options for hedging instead.

We only had four short lengths of box hedging last week. Now we have one and that is a low layer of a tiered hedge. The buxus blight had not struck but we weren’t that happy with two of the buxus hedges which did not keep good colour. Besides, the camellias were getting somewhat too large in the field and needed moving.
2The buxus was gone by lunchtime. That is our handy little tractor which was one of our better purchases 15 years ago.
3Our choice for beside the driveway was Camellia transnokoensis which has very small leaves and a mass of tiny white flowers in season.
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That is our Lloyd planting the new hedge this morning. He is hardier than both Mark and me. We do not go around with bare legs as autumn draws into winter. The plants went in at about 40cm spacings. We will keep the final height to around 120cm.
5We cut the new hedges back by close to half. This reduces stress on the plants which will have undergone quite a shock with their move and we want to encourage them to bush up and grow densely, rather than the taller, willowy growth. It should only take one or two fresh growths and the hedges should look as if they have been there from the start.

We think we will be much happier with camellia hedges than the boring old buxus.