· I could have added about 30 more entries to this list of plantsnot to prune in the fall. But for now, I thought I’d start with these popular ornamentals that we shouldn’t touch until spring rolls around. · To help you avoid this blunder, I have put together a list of plantsyoushouldneverprune in the fall. Read on before doing any damage to your perennials this year. · In simple words, if you prune in fall, you risk cutting off flower buds and potentially losing next season’s blooms entirely. Of course, not every plant makes this list, some perennials actually benefit from a fall cutback. Here’s a guide to perennials you can safely prune in October. · Here are seven plantsyoushouldneverprune in the fall. One of the first signs that spring is here is the bright yellow flowers on a forsythia shrub. Prune it in the fall, and you'll have no blooms next spring since the flowers appear on old wood. · Instead of following a one-size-fits-all approach to fall cleanup, learning which plants to leave standing creates a garden that supports local wildlife while reducing your workload. Extension sites like the University of Illinois remind us that the plants on this list serve important ecological functions during fall and winter.