Angel's trumpet grows quickly, so pruning is necessary. Angel's trumpet blooms from spring to fall
You can clip several butterfly bush species (Buddleia ssp.) in the fall
Chaste trees bloom on new growth, so even though it's encouraged to prune them in late winter, you could prune them as early as late fall.
After blooms fade, cut stalks nearly to the ground, leaving foliage at the bottom. Fertilize again, and you may get a second bloom
Gardenia bursts into fragrant blooms in summer, and the blooming season lasts well into fall with most species
Many hydrangeas do well when pruned in the fall, including 'Annabelle' and 'Limelight' hydrangeas
'Knock Out' roses bloom on new growth, and you can usually prune anytime except for late summer and early fall.
You can prune these varieties that bloom in summer and fall after the last flowering
After flowering, you should cut the plant back halfway
Select three to five shoots to become the main trunks, and remove all others at the ground