Posted: 27/05/2014 at 18:51
They don't need heat. They do well with a chill but not everyone does that so I assume it's not essential.
Carrie Thomas from Touchwood aquilegias advised January in a cold GH when I got my last order from her. I cover them with grit, water and ignore til they germinate. The grit stops them drying out
Outside is Ok but there's the danger of washout and birds scrabbling in the compost.