How to Grow Caltha Plants in your Garden

Caltha Growing Guide and Facts

Common Names: Marsh Marigold, Cowslip, Kingcup.
Life Cycle: Hardy perennial.
Height: 10 to 30 inches (25 to 75 cm).
Native: Wet and temperate regions of both hemispheres.
Growing Region: Zones 4 to 10.
Flowers: Spring.
Flower Details: Yellow, white, pink. Buttercup-like.
Foliage: Herbaceous. Heart-shaped. Kidney-shaped. Waxy. Smooth, winkled or toothed edges. Green.
Sow Outside: Cover seed. Early summer from fresh seed. Use Peat pots atop a saucer of water. Germination time: one to three months. Transplant peat pots into the garden proper in the middle of the summer. Spacing: Small species, 8 to 10 inches (20 to 25 cm); Mid-sized 18 inches (45 cm); Larger species 24 to 40 inches (60 to 100 cm).
Sow Inside: No.
Requirements: Full sunlight or partial shade. Soil pH 5.0 to 7.0. Clay, moist soil, wet soil. Regular watering to ensure that soil is always damp. Propagate: by dividing in the autumn, or following flowering in cooler areas.