Double Marsh marigold

Caltha palustris 'Plena' is a charming, moisture-loving perennial valued for its cheerful, fully double, butter-yellow blooms that resemble miniature pom-poms. Flowering in early to mid-spring, it provides a bright splash of colour at the water’s edge or in damp garden areas. The lush, rounded green leaves form a compact mound that remains attractive after flowering.

Ideal for pond margins, bog gardens, or consistently moist borders, this cultivar is a double flowering version of the native marsh marigold. It thrives in full sun or partial shade and is perfect for naturalistic planting schemes. A magnet for early pollinators and a vibrant harbinger of spring.

Site: Pond edges, bog gardens, damp borders
Soil: Moist to wet, humus-rich
Position: Full sun or partial shade
Season of interest: Early to mid-spring (flowering)
Hardiness: Fully hardy
Height: 30–40 cm (12–16 in) Spread: 30–45 cm (12–18 in)