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Rotting Dahlias
I went to check on my dahlias which I am storing in my garage. They are packed in dry compost in mushroom boxes so plenty of air around them. Trouble is many have rotted through and a lot are covered with a white mould. Any ideas how to save them? I was considering just potting them up now. Im guessing its a bit damp maybe I could try moving them indoors for a while?
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You probably didn't leave them upside down long enough, but throw the rotten tubers and take them to a warm room to dry a bit more, brush off any mould you can dust them with sulphur powder, but dry warm conditions are best really for a week or so..
might they have been subjected to frost?