Romneya coulteri

Romneya coulteri is native to Southern California and Baja California and Mexico. It is named after an Irish botanist Thomas Coulter. It is also called Canyon Poppy, Coulter’s Matilija Poppy, Californian Poppy, Bush Poppy, Giant White Californian Poppy, Dream of the Desert, California Tree Poppy, or Matilija Poppy. It is a member of the Papaveraceae family of plants. A suckering herbaceous perennial that grows in dry canyons and landscapes recently burned. It can grow to 2m or 7ft. It grows from rhizomes and produces divided grey-green leaves.

Romneya coulteri
Romneya coulteri or California Tree Poppy at St James’s Park in London

Giant White Californian Poppy flowers that are pure white appear in the summer. The flowers are large and impressive they grow to about 20cm or 8in wide. Romneya coulteri like the sun, plant it in moist but well-drained soil. They don’t like to be transplanted and they do spread naturally. Propagate by basal cuttings, root cuttings or by seed. Romneya coulteri is drought resistant. Watch out for Caterpillars and powdery mildew.

Romneya coulteri
Romneya coulteri or California Tree Poppy at St James’s Park in London

About Online Flower Garden & Dino

Dino
I am a flower enthusiast and a gardener at heart. Ever since childhood I loved reading about plants and started gardening at an early age. First by helping my father in the garden and later managing a large garden myself in my teen years. I planted and cared for a large number of plants, flowers, and trees both outdoors and in a greenhouse. To this day I enjoy visiting gardens and parks and learning about new and old specimens and varieties of plants.

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