Perennials: Blue flowers, 0 by Zuzu

Zuzu wrote:
It's time for blue flowers again, so get out those cameras, everybody, and start taking pictures as soon as yours bloom.

I should warn everyone that I'll be a shameless cheat in this thread as usual, not confining myself to perennials, but also throwing in annuals and bulbs and whatever else looks blue enough.

This one is a double Primula vulgaris. I lost the name tags of most of my Primulas long ago, so that's as close as I can get to the identification.