With luck it might force it self in the garden
I have grown this variety in Massachusetts for 2 seasons. Plant in June..Transplant Late July...Ready in late October/November. In general I force these like the Treviso (plastic bucket with water in the basement). However I have had a few form heads in the garden. The heads are small compared to the amount of leaves on the plant which is true of my experience with Treviso too.