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Winter aconite (Eranthis hyemalis) is a clump-forming, tuberous perennial producing cup-shaped, bright yellow buttercup-like flowers on a ruff of light green leaves. It makes a good ground cover plant from late winter to early spring and is ideal for naturalising in dappled shade beneath deciduous trees and large shrubs, especially in chalky soils. Bulbs should be planted in autumn in fertile, moist but well-drained soil. They spread rapidly to form colonies, which can be divided after flowering.