Caltha palustris, Marsh marigold, King cup - Marginal Aquatic Plant
Once established it produces a mass of bright yellow flowers very early in the spring, almost a ball of yellow.
After flowering in March and April most foliage will die back. Remove dead leaves to tidy and encourage a potential second flowering.
Position - Full Sun to part shade
Flowers - March & April
Height min - 30cm
Height max - 50cm
Planting depth min - 0cm
Planting depth max - 15cm
Flower colour - Yellow
Growth rate - Slow