This year is my first year growing Dahlia's. Up until now they have been in my greenhouse.
I know I will need to harden them off before they're planted out but I'm unsure when to do this?
Some of them are getting quite tall now. I was wondering when other people do it? I understand it should be after the last frost - personally I'm in Sunny Suffolk and suspect (hopes) we have had that.... How is everyone else's coming along??
Any advice given would be appreciated