By Howie10
France 
First time for me growing begonais. All was going well, 5 leaves, kept in my greenhouse. Now they all seem to have some kind of infection on the leaves. Like white patches, and some leaves are curling! anyone help?
10 May, 2011
Answers
Many thanks for your help. Have removed the problem leaves, and moved them into the shade. Will see how they go.
13 May, 2011
I hope they grow well for you Howie. I used to have a very shady garden and they made some nice colour every summer. Now I have a sunny one and am revelling in it! :-)
13 May, 2011
The white patches sound like scorching to me. Begonias like shade, part, or dappled shade. In the greenhouse, the sun will have been blasting them. I'd start hardening them off by taking them out of the greenhouse in the daytime and putting them somewhere more to their liking (in shade). Put them back in the greenhouse at night. Keep this up for a couple of weeks, then plant out the begonias in shade / part shade. They'll probably recover.
10 May, 2011