Sunday, January 10, 2010

SO WHAT’S HARDY NOW?

Its hardly crept above freezing anywhere in the British Isles for some ten days now. Last winter was an old-fashioned event, with a frost every morning here for two months, but this one is so like the winters of my childhood, in the Kent/Sussex border area, where every winter in the 1960s and early 1970s there was at least one massive snowfall.

So, where does this leave us with plantlife? ‘Zonal Denial’ to borrow a phrase from American (Oregonian) gardeners has been all the rage over the last twenty years, planting stuff out from warmer climes in the hope that it will survive. And much of it did: vast mimosa trees turning brilliant fragrant yellow in London squares, agaves in urns, olive trees in gardens. Gardeners have always liked to push the possible, and with so much new plant material coming into the country, at a time when we have had a run of mild winters, there have been temptations aplenty. I was (note WAS) part of the trend – indeed perhaps helped start it off. All that exotica that we began to play with in the 1980s and 1990s. In my case, selling plants on a regular nursery stand at RHS shows in London (in the days when these events used to happen) made me realise just how good the city was for growing plants – the urban heat island effect, and a fairly dry climate. People started buying supposedly tender plants like Abutilons and Banksias and then coming back next spring to tell me that it had survived the winter with no protection/ flowered all winter, etc etc.

The architectural plant craze helped as well. Importers of palms, yuccas, bananas and tree ferns had a field day: mild winters, a rush of new plant prospecting AND lots of young folk who had no memory of cold winters with lots of money to spend. Big of a boy thing this – the rather macho world of big exotic-looking stuff, when you could boast of what you could get away with next spring – a bit of defying the ruling gods.

I got out of all this a long time ago, round about the mid 1990s. For me the future lay in stuff which you did not have to worry about every winter or celebrate its survival every spring. The stuff that began to excite me was the perennials and grasses I saw in Germany and Holland, for which a British winter was nothing. Part of me just lost interest in the stress of growing borderline hardy plants. After all, I was now gardening in Hereford, not the south Devon coast.

This winter will probably leave a lot of vegetable mush. Its important we learn from it, about the plants that survive and why they did. It won’t mean we’ll have to go back to the garden world of the 1970s, because there really is a lot of new plant material we now have, a lot of which will probably be ok. But at least the sillier excesses will hopefully be curbed. Like the fool who planted an olive orchard in Devon, and hopefully (and this makes me cross) the wholesale nurseries who sell things like Lavandula stoechas with no warning on the label about its borderline hardiness. A periodic reality check is definitely a good idea.

I can’t help point out though that Mexican Salvia coahuilensis was still flowering before getting covered in snow!

4 comments:

The Intercontinental Gardener said...

Hi Noel, I've loved your garden writing for a long time and can't help slipping my comment in here. Without wanting to be a complete bore, I think we might need to rethink the usage of all these amazing exotics from the sustainability point of view. I know it is a thrill for some to grow Dicksonias and other lovelies from faraway countries, but can we really afford all those fuel gulping transports of plants all around the world? Shouldn't we try to keep as local as possible, just like with food? I know this sound quite righteous and that new, fancy plants are irresistible for many, but still I can't help questioning the real cost for hauling plants from a country to another, which often is the case with these big exotics... Anyway, thanks for your thought-provoking blog!

The Rainforest Gardener said...

A lot of my tropics have died back, but experimenting with the impossible tropicals is just one of the most exciting things a gardener can do! We have an opportunity to do what no other gardener would dare try, and then pass on the knowledge to others, provided they plant mostly hardy native plants to avoid that devastated look. I love your books and I can't wait to check out the new one!

Les Longino said...

I've been going through a similar thought process in my garden here in Tucson: there are so many cool subtropical cactus & succulents that can almost be grown outside, if you're careful to baby them through the winter, keeping a watchful eye on the predicted low temp for the night and all that. I've got an incredible Aloe vaombe that's in that "almost" category, and in winters past I've been known to drape Christmas lights on it, and turn them on every cold night to keep the gorgeous inflorescences alive (they come out in dec/jan, part of the appeal of the plant). But I recently moved to the NE side of town, close to the mountains, just a bit higher elevation, where all the cold air rushes into town from the mountains, and am finding some plants in that "almost" category are just that much harder to keep alive through the winter out here.... so yeah, I get where you're coming from. The nightly ritual of making sure certain plants are covered with frost cloth and all that starts to feel like an inconvenience more than anything else (as I'm not necessarily going to be home every single night, I do like to do a bit of traveling here and there), plus the frost-cloth-wrapped plants don't add much to the look of the garden, either. So I'm finding myself leaning towards plants that are still exotic and cool, but putting more importance on them needing to deal with the summer heat and the winter cold without a lot of daily worry. It's actually opened up a very interesting & exciting aspect of gardening here, the challenge of finding cool, unusual plants that will put up with the climate extremes of this locale, instead of saying to myself "I know this will need protection in the winter, but I'll just deal with it", because I'm TIRED of just dealing with it. :)

gnman said...

Lavandula stoechas is very variable - while I agree that most cultivars are really only half-hardy (mostly the recently introduced ones) we find L. s. 'Papillon' to be bone hardy here in Shropshire, so don't write off the whole species!