The single-flowered form occurs wild in Great Britain. It is a.
In containers round garden; also in marshy spots. Will thrive both in full sun and in partial shade. The striking appear early in the year.
Neutral or slightly acid soil, not too poor and, of course, very damp.
Mature clumps are easily divided. Caltha can also be raised from.
Caltha palustris: Height 25-50 cm; flowers in mid to late spring, sometimes for a second time in the autumn. The flowers are single, bright yellow; the foliage is bright green. Garden varieties are ‘Multiplex’ with double flowers; and ‘Monstruosa’, a strain with even larger double flowers of unusual shape.