About
A vigorous, suckering herbaceous perennial to 2m in height, with divided, grey-green leaves and poppy-like flowers 15cm in width, with crinkled, pure white petals and a boss of deep yellow stamens.
About the genus
Romneya are suckering subshrubs with pinnately lobed leaves and large white flowers in summer
Growing conditions
SunlightFull sun
Soil typeLoam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectSouth-facing, West-facing
ExposureSheltered
UK hardinessH5
Plant details
Plant typeHerbaceous Perennial
HabitSuckering
FoliageDeciduous
Height1.5-2.5 metres
Spread1-1.5 metres
Time to full height5-10 years
Suggested usesCottage and informal garden, Mediterranean climate plants
Native toCalifornia, Mexico
Care notes
CultivationGrow against a warm, sunny wall protected from cold winds. Mulch deeply prior to winter. They dislike transplanting but once established it can spread, so site with care
PruningPruning group 6
PropagationPropagate by basal cuttings in spring, root cuttings in winter or propagate by seed sown in spring at 13°C to 16°C
Pest resistanceCaterpillars may be a problem
Disease resistancePowdery mildews may be a problem