The first things that bloom here are violets in late May, and chokecherry trees in late May/early June (not naturally occurring; they're introduced, but they grow well here). Then all the wildflowers simply explode into bloom in the middle of June.

I'm looking forward to seeing what my delphiniums do this year. I put them in late last summer and they bloomed flamboyantly all through the frosts -- I actually cut some flowers that were literally frozen and brought them in and they thawed out just fine. Now they have little green shoots coming up when nothing else is; it hasn't turned green here either (though it's close). They are turning out to be astonishingly resilient to our harsh climate, for a domestic flower.