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Romneya coulteri

Romneya coulteri is native to Southern California, 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. The flowers make an impressive presentation.

Romneya coulteri is a member of the Papaveraceae family of plants. It is a herbaceous perennial. It grows in dry canyons and recently burnt landscapes. It grows to 2m or 7ft. It grows from rhizomes. The leaves are grey-green. They are divided into lance-shaped lobes.

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

These Giant White Californian Poppy flowers in the summer. The flower color is pure white. The flowers are large and impressive and white. The flowers grow 20cm or 8in wide. They are solitary. The petals are crinkly and there is a center of many yellow stamens.

How to grow Romneya coulteri:

Grow Romneya coulteri in the sun. Plant it in moist but well-drained soil. Avoid transplanting them as they don’t like it. They do spread naturally. It is a suckering plant. Propagate by basal cuttings, root cuttings. Or propagate from 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

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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