How to Grow Romneya
Named in honour of the Rev T. Romney Robinson (1792-1882), an Irish astronomer who discovered Romneya coulteri (Papaveraceae). A genus of two species of handsome, semi-shrubby perennials from southwestern California with extremely attractive poppy-like flowers, borne singly at the ends of the stems.
Species cultivated R. coulteri, Californian tree poppy, 6-8 feet, leaves and stems glaucous, flowers satiny white, fragrant, 4-5 inches across, petals frilled, with a prominent mass of golden stamens, throughout the summer. R. trichocalyx (syn. R. coulteri trichocalyx), similar, but with more erect growth and somewhat larger flowers with a dense covering of bristle-like hairs on the calyx. Hybrids are sometimes offered under the name R.
x hybrida (syn. R. vandedenii).
Cultivation These beautiful plants should be planted’ in April or May in a deep, well-drained soil and a sheltered sunny position, preferably beneath a south-facing wall where they can spread. Once