I tried a few things last Fall. I waited until now to make sure they were working.
The first idea was to replace my aging butterfly bushes. I'd decided to try cloning the best one with stem-cuttings. I pruned it in the early fall, and it sent out new shoots as I expected. I cut them all off and set them into 6 cell-packs after pulling the lower leaves off and dipping the cut stems in rooting hormone. 10 of the 12 cuttings are growing well under my plant stand lights!
The second idea was to take a dozen catmint stems and root THEM. 10 out of 12 growing nicely there too!
The third idea was the best. I LOVE spreading petunias (aka "wave petunias"). I had 6 last year at a few $$ apiece. Sometimes they are wonderful. Last year was a hard year and they didn't grow well. So last Fall, I dug up the only survivor and put it in a pot under the grow lamps. Then I snipped off 12 stems and rooted them with rooting hormone powder (the stuff is AMAZING). Not only is the original plant blooming nicely, ten of the stems are growing as well. If they stay healthy, I will have 13 spreading petunia to plant in May!!!