what is your favorite long-blooming perennial?
This was supposed to be mainly weed-killing year in rejuvenating the garden of the house we bought last year. But, I couldn't resist buying SOME plants, and I'm getting extremely anal about planning what I'll plant next year. Next year will be my garden creation year! Yea!
In planning my garden I'm trying to find some nice long-lasting perennials. So far I've planted a rudbeckia and some purple coneflower, and I already had some kind of heliopsis I'm trying to rejuvenate.
What are you favorite long-blooming perennials? Please be sure to include when they begin and end blooming.