Help with Dahlia
I bought some Dahlia's a few weeks back and planted them in to trays, I watered them a tiny bit. I have been checking them everyday, some have a tiny bit of growth and some haven't. I know the can take a while before I see any growth but I thought I would just feel round the top to make sure they are still quiet firm.
One of them felt a little bit soft so I lifted it up and found all this blueish looking stuff on the underneath and the tuber's that it is on are quiet soft and some have gone wrinkly but some of them are still ok.
They are in a unheated greenhouse.
Could somebody please tell me what the stuff is and do I buy some fungicide powder for it?
Any help please.