Easy and invaluable nasturtiums

May 11th, 2018 | Plant Talk with Graham Rice | 0 Comments

Nasturtium 'Empress of India'

Nasturtiums have developed an unfortunate reputation. They’re enjoyed, of course, but somehow they’re dismissed as, I don’t know, too easy perhaps…? Not ordinary, exactly, because they’re far from ordinary… The seeds are large, easy to handle so great for kids. Maybe it’s the fact that when grown in rich soil you get so much foliage that you can’t see the flowers – although, these days, that’s a bit of a myth. So were does that leave us?

It means that we should definitely grow them – but in the right way, in the right place, and using the right varieties. Start now.

I’ve just sown mine, yesterday. I’m growing quite a few different varieties so I’ve sown five pots of each variety, three seeds in each pot – and I expect almost all of them to come up.

I could sow them where they’re flower but I don’t want the mice to dig them up and, frankly, I’m not yet quite sure where they’re going to go! So they’ll sit on the spare room windowsill until they peep through, then I’ll stand the pots in a sheltered spot outside for two or three weeks.

But they must be kept frost free: nasturtium seedlings are very soft and fleshy: one waft of icy air and they’re mush.

When it comes to planting them we’re back to those hidden flowers. What happens is that in rich soil, or if you feed them, the leaves become broader and, more importantly, the leaf stalks become longer but the flowers stems don’t. This stretches the leaf stems beyond the flowers – which are hidden by the lush foliage.

So: choose bushy nasturtiums whose foliage tends to stay compact, choose somewhere sunny and choose just about any soil that’s not rich and fertile. And don’t plant out your seedlings until after the last chance of frost.

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Is one of our best known gardening writers. A graduate of the Royal Botanic Gardens, Kew, Graham was previously Gardening Correspondent of The Observer.
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