Persicaria "Firetail" blooms all season long for me. If it gets ratty looking all you do it whack it back and it comes back in no time. Here is a picture of it amongst other things including a brugmansia that is just now coming into bloom. Down lower right is Salvia 'Hot Lips' that also blooms all season long. Dr. Moy, a hardy ginger for me at least, also blooms late in the season for me. Just yesterday cut a few of the flower stalks and brought them inside and the scent wafts through the house. While not a perennial flower, the male gingko tree also adds its presence in the fall garden. As do witch hazels.

Sorry, I don't know the answer to your question. Here's a picture of a Hummingbird Moth feeding on my wife's Ginger Lilly. Thanks to whoever ID'ed it on the previous ginger lilly thread. Here is a link that might be useful:

Half of my gingers rotted. The others took 3-5 months to come up and towards the end of that time I had bottom heat and a covered dome and placed them on the top shelf of the greenhouse where it might have gotten 100 or more during the day. It seems that they need heat in order to sprout. Next yr I'm going to try them in a sandier soil with daily watering.

lol ... i have 1600 different hosta .. or used to.. whats this about dividing and spreading the same ones all around... whats that all about... want a list of out best suppliers??? have you not read a couple thousand of the prior posts??? ... thats what winter is for.. along with ordering a couple dozen from every supplier we list.. and planting them in late april or so ... where are you ... big city..... ground freeze??? .. soil type.. trees your working under.. etc ... ken