When does Gentiana angustifolia bloom?

Submitted by Novak on Sat, 12/07/2013 - 17:43

The background to this question: every year, my NARGS chapter has a display in the Philadelphia Flower Show. The challenge (OK, one of the challenges) is to force plants into bloom by the beginning of March. This year, one of our plants is Gentiana angustifolia. To figure out when to start forcing the plant, I'd like to know when it normally blooms. So if you've grown this plant, when does it bloom for you? And, given that your climate differs from mine, what else is blooming when Gentiana angustifolia blooms?