Is mid-September too late for planting shrubs, specifically potentillas, in Cumberland Country?

Question: Is mid-September too late for planting shrubs in Cumberland Country? Specifically, I was considering potentillas. Answer: Lynne M. Holland, Horticulture and Social Media Professional Mid to late September is an excellent time to plant shrubs and trees in Cumberland County.  This fact sheet from the UNH Extension covers the risks and rewards of fall planting. read more Is mid-September too late for planting shrubs, specifically potentillas, in Cumberland Country?