Kerria – Rosaceae
Kerria japonica (China)
(= K. japonica ‘Simplex’)
Habit: Small shrub, 0.8-1.5 (2) m tall and wide, many shoots but few twigs; gradually like a thicket with short runners; upright and arching; twigs lively green; medium to fast-growing.
Flowers: When leaves shoot, shimmering bowl flowers, end of April to May, some second flowers.
Leaves: Oval-lanceolate, pointed, early shoots at end of April; fresh green, green-yellow in November.
Roots: Shallow, with runners.
Demands: Sun to shade, flowers bleached in the sun, longer flowering time in the shade; tolerates warmth, usually frost hardy, occasional damage is no problem, not demanding.
Soil: On all soil that is not too dense.
Note: Fertilising causes it to spread like weeds with few flowers.
Hardiness: Zone 5b