Lynwood Gold Forsythia is hardy in USDA zones 4 to 8 and flowers best in full to part sun — at least six hours of direct light gives you the heaviest bloom. It is adaptable about soil but prefers a moist, well-drained spot and rewards you with fast growth.
Planting
- Choose a site with full to part sun and room to spread — this shrub matures to 8 to 10 feet wide.
- Dig the planting hole twice as wide as the root ball but no deeper than it is tall.
- Set the plant so the root flare (where the trunk widens at the roots) sits level with the surrounding soil, never buried.
- Backfill with the native soil, firm it gently to remove air pockets, and water in thoroughly to settle the roots.
- Spread 2 to 3 inches of mulch over the root zone to hold moisture, keeping it pulled back a few inches from the stems.
Care & maintenance
- Water. Keep the soil evenly moist the first growing season while roots establish. Once settled, the shrub is fairly drought-tolerant and needs watering mainly during extended dry spells.
- Feed. A single application of balanced, slow-release shrub fertilizer in early spring is plenty. Avoid heavy feeding, which pushes leaves at the expense of flowers.
- Light. Full sun produces the densest bloom; in too much shade the plant grows leggy and flowers thin out.
- Prune. Forsythia blooms on old wood, so prune right after flowering finishes in spring. Remove the oldest, thickest canes at the base to renew the plant and shape the rest. Pruning in summer, fall, or winter cuts off next year's flower buds.
- Mulch & winter care. Maintain a mulch layer year-round to moderate soil temperature and moisture. The shrub is reliably cold-hardy and needs no special winter protection in its zones.
- Pests & disease. Forsythia is notably trouble-free. Watch occasionally for leaf spot or galls; good air circulation and removing affected stems usually keeps the plant healthy.