Gooseneck Loosestrife is a hardy perennial, vigorous and bright, excellent for damp problem areas. Gooseneck Loosestrife flowers in summer in shades of yellow, and performs best in full sun to part shade with high watering once established. This perennial matures to roughly 0.5-3 feet tall and 1.5-3 feet wide. It is ideal for planting in drifts through a border, or as a reliable cut flower, offering dependable colour that returns every year. Well suited to the Canadian climate in zones 3-9, it establishes readily and improves with age. Keep the soil consistently moist through hot weather for the best performance.
Mature height: 0.5-3 feet
Mature width: 1.5-3 feet
Bloom: Yellow, summer
Light: Full Sun to Part Shade
Water: High — keep the soil consistently moist, especially in summer heat
Hardiness: Zone 3-9
Maintenance: Medium maintenance
Pruning: Cut back to the ground in late fall or early spring; deadhead spent blooms through the season to encourage rebloom.
🪴 Planting Instructions: Dig a hole slightly wider than the pot, keeping the top of the root ball level with the surrounding soil. Loosen circling roots before planting, backfill with native soil amended with compost, then water thoroughly to settle. Space plants about 1.5-3 feet apart and keep well watered through the first full season while roots establish. Plant in full sun to part shade.
💧 Care & Watering: Water high: keep the soil consistently moist, especially in summer heat. Mulch to conserve moisture and moderate soil temperature, and feed with a balanced slow-release fertilizer in early spring. Cut back to the ground in late fall or early spring; deadhead spent blooms through the season to encourage rebloom.
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