Can you cover them with a cardboard box or something?
I have Marilyn Morss Johnson loaded with buds and will probably start blooming sometime next week. The last bloom on Zoe Allegra will be blooming in the next couple of days. I might start a November thread.
Also, I am getting unusually warm weather. This feels like summer still in central Florida. I have other plants blooming that have never bloomed this time of year. I think the plants think it is Spring/Summer already! We just skipped Fall/Winter and they are putting out blooms! I can say that my over-wintering Ruby-throated hummingbirds are delighted as they are zipping through my yard chasing each other.