Yes, Hetty, it is space related. Many of my plants are so large that I can neither get them into the contractor bags nor into the closets to overwinter. Don't forget, here in NE Mississippi, all of the plumeria have to come in Oct-Nov. and overwinter inside. I don't take cuttings in the fall from all the plants, just the very large ones. So far I have seen absolutely no difference when rooting the cuttings taken in the fall or the cuttings taken in the spring. Perhaps I have just been lucky. I root everything in the spring, though I am experimenting in rooting numerous cuttings taken about two weeks ago. I will let you know how that experiment comes out.