Posted: 20/02/2016 at 08:12
Neither of the seeds you mention need heat to germinate. Cold GH is good, or outside for the aquilegias. Hardy perennials never need heat to germinate. Heat will prevent some of them from germinating. Aquilegias and delphiniums are Ranunculaceae, many of that family need cold and fresh seed is always best.
Sown fresh, aquilegias germinate before winter. Sown cold in January they germinate in spring