Overview

Romneya coulteri is a plant with a suckering habit in the genus Romneya, part of the Papaveraceae family, with deciduous foliage. Romneya coulteri grows best in full sun, and tolerates loam and sand soils and any pH. Its UK hardiness is rated H5. Suggested uses include cottage and informal garden, mediterranean climate plants and wall side borders.

About

Romneya coulteri, the Coulter's Matilija poppy or California tree poppy, is a perennial species of flowering plant in the poppy family (Papaveraceae). Native to southern California, USA, and Baja California, Mexico, it grows in dry canyons in chaparral and coastal sage scrub plant communities, sometimes in areas recently burned.

Wikipedia contributors, CC BY-SA 4.0 — Romneya coulteri

Growing conditions

Best soil and position for Romneya

Sunlight

Full sun

Soil type

Loam, Sand

Soil pH

Acid, Alkaline, Neutral

Soil moisture

Moist but well-drained, Well-drained

Aspect

South-facing, West-facing

Exposure

Sheltered

UK hardiness

H5

Plant details

Romneya coulteri size, habit and characteristics

Habit

Suckering

Foliage

Deciduous

Suggested uses

Cottage and informal garden, Mediterranean climate plants, Wall side borders

Care notes

Pruning and caring for Romneya coulteri

Propagation

Basal cuttings in spring, root cuttings in winter, seed sown in spring at 13°C to 16°C

Pest resistance

Caterpillars may be a problem

Disease resistance

Powdery mildews may be a problem

Frequently asked questions