By Davidcleaver
United Kingdom 
my begonia corms have now all got shoots on and need re,potting ,do i have to plant corms completely under the compost ,covering them completely or sit them on top of compost,as i did when i first had the corms to get them to shoot, also do they need to be in full sun at this stage, they are in my greenhouse heated at a constant 62 degrees
12 Mar, 2011
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Pot them up so that the corm is sitting beneath the compost, but with the growing area just visible on the top. They cannot be moved outside until the end of May, when all risk of frost is past, so keep them in the greenhouse till then.
12 Mar, 2011