Perennials: Mid-late summer blooms, 3 by warriorswisdomkathy

warriorswisdomkathy wrote:
Nuts...I've grown that one and was only disappointed by the fact that it was not a perennial as stated,(or I would have collected seed), gotten at the Denver Botanic Garden Sale in the spring. Seems to me it was more like 12-18" tho.

pix Physostgia virginiana (Obedient Plant), normally 36-48", this year approaching 24".
pix2 Ammi visagna, normally I believe is around 30-36", this year only about 4-6"
pix3 Campanula (I believe this is rotundifolia)
pix4 Dracocephalum moldavicum, annual 18"
pix5 Coreopsis rosea, has anyone had any sucess collecting seed from this type?