Renovating an Overgrown Forsythia Hedge: Hard Pruning vs. Replacement

Forsythia Response to Hard Pruning

Cutting to 12–18 inches can work, but often results in sprawling, ground-hugging regrowth rather than upright stems. Forsythia blooms on old wood; severe pruning sacrifices next spring's flowers.

Better Privacy Hedge Choices for a 12-inch Wide Bed

1. Arborvitae 'Emerald Green' (Thuja occidentalis): Narrow, dense, evergreen. Shear once yearly. Buy 4–5 ft plants for instant screen.
2. Cherry Laurel 'Otto Luyken' (Prunus laurocerasus): 4–5 ft tall, glossy evergreen, white flowers. Shear twice yearly. Avoid straight species (English laurel)—it becomes a monster.

Transition Strategy

Plant the new hedge just in front of the old forsythia. As it establishes, remove the forsythia in sections. This maintains privacy throughout.