Plant library · Shrubs
Forsythia x intermedia
Forsythia is a vigorous deciduous shrub that brings bright yellow bloom to bare, arching branches in early spring. Reaching about 8 feet tall and 10 feet wide, it has the scale for a large border, property-edge planting, or an open mass rather than a narrow foundation bed. Its flowering display arrives before the foliage, so give it a position that is easy to see from windows, entries, or a frequently used path.
Place forsythia behind smaller shrubs and perennials, where its fountain-like outline can rise without blocking circulation. It suits informal borders, hedges, banks, and slopes; use a repeating row when a loose seasonal screen is more useful than a clipped edge. Keep the planting line away from walls, fences, and tight corners so long branches have room to arch outward and so every plant can be reached for pruning after bloom.[1][2]
Set plants 8 feet apart, center to center. Each shrub can develop a roughly 10-foot-wide canopy, so neighboring plants may meet and overlap as they mature; this supports a continuous informal planting but is too broad for a slim bed. Allow about 5 feet from the plant’s center to a path, drive, or bed edge, and preserve a working strip beside the row for pruning and cleanup.
Use a full-sun location for the strongest early-spring flower display. Provide moderate moisture and favor soil that drains well rather than a spot that stays wet. In a mixed border, place it where routine watering can reach the root zone during establishment without turning the planting area into a constantly saturated bed.[1][2]
The shrub occupies its greatest visual role in early spring, when yellow flowers open along bare stems before leaves emerge. Plan its summer backdrop as well: lower flowering plants or foliage in front can soften the broad green mass once bloom has passed. Prune soon after flowering, removing older stems as needed; later pruning can remove buds intended for the following spring’s display.[1][2]
Reserve enough clearance for periodic renewal pruning, since unpruned plants can become sprawling and uneven in outline. In the colder end of its growing range, severe winter temperatures or late freezes can reduce flowering by damaging unopened buds. Avoid making this shrub the only source of spring interest in a highly exposed location where bloom loss would leave a prominent gap.[1][2]
Editorial content updated 2026-07-20.