Dahlia propagation

           

I thought I'd update this thread... I did finally have some success. 
I set the tubers in mushroom trays on a heat mat set at 17°with the crowns on show.

I had some tubers that rotted quite quickly - I believe these had been frosted as they were soft quite soon after putting them in the compost. I didn't water until the soil looked dry.

The first few shoot were quite thick. After this one was removed the following material was very thin. These rooted fast. So next time i wont bother trying with the first thick shoots.

I used rotting powder and a mix of perlite, grit and compost. They need misting lots or they droop. In the end yo keep the humidity up i used a layer of clingfilm draped over the top. When i used a lid the stem rotted. I have managed about 80 cuttings. So very pleased with that.