Q.Red-Tip Photinia in Maine
Will red-tip photinia survive the cold winters of southern Maine? How often does it need pruning?
Certified GKH Gardening Expert
It will need protection in severe cold. They are generally hardy only to 0 degrees F. Growing zones for your state range anywhere from 3-5 (eastern parts include some Zone 6). This being the case, I would suggest growing the shrub in a container, which can be overwintered indoors, or the garage.
You can prune it back anytime between spring and fall, with late spring/early summer being the most ideal. This article will also help: