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Plants

Begonias

Posted by: Adam Pasco, 25 March 2008, 02.10PM

Begonia flower Big, blousy and beautiful, either you love begonias or hate them. I'll admit to being torn between the two, loving them in private but being a little embarrassed to admit my affections in public. Perhaps they appeal to my feminine side, but let's not go there.

The brown tubers look so unpromising when they arrive in the post from mail-order suppliers, but planted with the slightly concave surface upwards you'll soon spot signs of growth as green shoots emerge. Trailing varieties are available, but I like the upright ones with big double blooms packed like petticoats with swirling layers of petals.

The large flowers are quite heavy, so to avoid plants toppling over I always grow begonias in terracotta pots instead of lightweight plastic ones. I carefully slip split canes down the sides of the pot and tie in the thick fleshy stems with soft green string.

Then come the flowers; I usually bring a pot indoors to brighten the kitchen window sill while I'm doing the washing up - it's good to have a distraction.

Last autumn I stopped watering my begonias and left the plants to die down on their own, thinking their tubers could safely overwinter in pots of dry compost. How wrong I was. I've just tipped some out to replant into fresh compost but discovered the tubers being eaten away by vine weevil grubs. None of my begonias has survived. Next autumn I'll remember to empty out the pots, clean up the tubers, and store them in clean dry compost for winter instead.

Comments

  • Pauline Cumbria

    29 March 2008, 10.03PM

    I did exactly the same.For 3 yrs i had a lovely yellow and a red begonia,took them out of pots each year.Then i thought i would try leaving them when i went to replant them there was practicaly nothing there.I was really annoyed with myself,so wont be doing that again

  • wendy graham

    11 April 2008, 08.51AM

    Am growing begonias from tubers for the first time this year, would love any advice on how to get the best from them.

  • Catherine B

    18 April 2008, 10.28PM

    I am a novice, but a keen gardener and I too am about to pot some begonia tubers for the first time. Any advice? Also, I have the dreaded Marestail weed shooting up around my garden. Any advice to get rid it it before it takes over?

  • Adam Pasco

    01 May 2008, 01.31PM

    Catherine, I hope your begonia tubers are producing shoots now. Start tubers in small pots, planting with the concave surface upwards, as shoots develop from this side. As roots develop and fill the compost so you can pot this tuber up into a pot just one size larger. By July you'll have reached a pot perhaps 15cm across, and I'd recommend choosing a heavier terracotta pot for this, and NOT a lightweight plastic one. Why? A heavier pot, preferably a shallow and wide style, offers greater stability for tall, top-heavy begonias as they come into flower. Use thin split canes pushed into the compost to hold shoots upright and prevent them falling over.

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