Marsh ragwort (Jacobaea aquatica)

Marsh ragwort

Marsh ragwort (Jacobaea aquatica) is a biennial flowering herb found primarily in wet grassland. Its yellow flowerheads are borne in loose flat-topped clusters. The plant is mildly toxic to cattle and can cause issues in wet hay meadows used for grazing. Still, marsh ragwort is a valued part of ecosystems and provides food for a variety of moths and butterflies.

Scientific classification

Species

Marsh ragwort (Jacobaea aquatica)

Asters bellflowers fanflowers and allies

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Biennial, Perennial

Lifespan

Herb

Plant Type

Summer, Early fall, Mid fall

Bloom Time

Yellow, Gold

Flower Color

Semi-evergreen

Leaf type

20 - 35 ℃

Ideal Temperature

Images of Marsh ragwort

Care Guide for Marsh ragwort

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Marsh ragwort thrives in wetlands, requiring consistent moisture and tolerating brief flooding. It needs weekly watering to replicate its preferred conditions and is best suited for outdoor cultivation. As an herbaceous perennial, it benefits from natural rainwater, ideal for areas with regular rainfall.

Fertilize: Fertilizing marsh ragwort promotes growth and flowering. Use balanced fertilizers, switching to high-nitrogen types for vegetative growth. Apply monthly and dilute to half-strength to avoid root burn. Water before and after fertilization for better nutrient absorption, adjusting quantity based on plant size and soil fertility.

Pruning: Marsh ragwort prefers wetland habitats and produces bright yellow flowers. Prune marsh ragwort in early to late spring to support healthy growth and shape. Regular pruning encourages vigorous blooming, minimizes spread, and lowers pest risks.

Propagation: Marsh ragwort is propagated by sowing seeds harvested from mature pods. Sow seeds in well-draining soil without burying them too deeply. Maintain moderate soil moisture, avoiding overwatering to prevent rot. Seedlings emerge quickly but need protection from extreme weather until established.

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