The Correct Time to Prune

It really depends on the type of shrub you are needing to prune and if and when it flowers. Pruning flowering shrubs at the wrong time can affect the blooming. For shrubs that flower in summer: prune early in the spring before blooming. Pruning in the spring will encourage new growth and more flowers. Examples: Blue Mist Spirea, Anthony Waterer Spirea, Potentilla.

Shrubs which bloom on old growth (Lilacs) from the previous year should be pruned AFTER flowering. Taking off last year’s wood would result in little or no blooming. Examples: Forsythia, Snowmound Spirea, Cistena Plum, Lilacs.