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Romneya coulteri (Californian tree poppy)
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1 hour care
per year
per year
1.5m
Max height
Max height
2.5m
Max spread
Max spread
5-10 years
To maturity
To maturity
Plant details
Botanical name
Romneya coulteri
Other names
Californian tree poppy, Dream of the desert, Giant white Californian poppy, Matilija poppy, Californian poppy, Bush poppy, Canyon poppy, Fried egg flower
Genus
Romneya Romneya
Species
R. coulteri - R. coulteri is a vigorous, upright, suckering herbaceous perennial or sub-shrub, with divided, grey-green leaves and, in summer, large, white, poppy-like flowers with dark-yellow stamens.
Romneya coulteri is: Deciduous
Habit
Clump-forming, Erect, Bushy
Awards
RHS AGM (Award of Garden Merit)
Flower
White, Yellow in Summer
Foliage
Grey-green in Summer
How to care
Watch out for
Specific pests
Caterpillars Caterpillars
Powdery mildew Powdery mildew
General care
Pruning
Cut to the base in autumn or spring.
Propagation methods
Seed, Root cuttings, Basal cuttings, Suckers
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Where to grow
Romneya coulteri (Californian tree poppy) will reach a height of 1.5m and a spread of 2.5m after 5-10 years.
Suggested uses
Cottage/Informal, Beds and borders, City, Drought Tolerant, Mediterranean, Wallside and trellises
Cultivation
Grow in fertile, well-drained soil in full sun with shelter from cold, drying winds and frost. Site carefully as resents root disturbance. May be difficult to establish but once established, will spread vigorously via suckers. Drought tolerant.
Soil type
Loamy, Sandy
Soil drainage
Well-drained, Moist but well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Tender in frost (H3)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Romneya coulteri
Other names
Californian tree poppy, Dream of the desert, Giant white Californian poppy, Matilija poppy, Californian poppy, Bush poppy, Canyon poppy, Fried egg flower
Genus
Romneya Romneya
Species
R. coulteri - R. coulteri is a vigorous, upright, suckering herbaceous perennial or sub-shrub, with divided, grey-green leaves and, in summer, large, white, poppy-like flowers with dark-yellow stamens.
Native to
Baja California, Mexico, California
Foliage
Deciduous
Habit
Clump-forming, Erect, Bushy
Awards
RHS AGM (Award of Garden Merit)
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Colour
Flower
White, Yellow in Summer
Foliage
Grey-green in Summer
How to care
Watch out for
Specific pests
Specific diseases
General care
Pruning
Cut to the base in autumn or spring.
Propagation methods
Seed, Root cuttings, Basal cuttings, Suckers
Monthly care advice
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Where to grow
Romneya coulteri (Californian tree poppy) will reach a height of 1.5m and a spread of 2.5m after 5-10 years.
Suggested uses
Cottage/Informal, Beds and borders, City, Drought Tolerant, Mediterranean, Wallside and trellises
Cultivation
Grow in fertile, well-drained soil in full sun with shelter from cold, drying winds and frost. Site carefully as resents root disturbance. May be difficult to establish but once established, will spread vigorously via suckers. Drought tolerant.
Soil type
Loamy, Sandy
Soil drainage
Well-drained, Moist but well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Tender in frost (H3)
USDA zones
Zone 10, Zone 9, Zone 8, Zone 7
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy, Sandy | Tell us... |
| Soil drainage: | Well-drained, Moist but well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Tender in frost (H3) | Tell us... |
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Designed by Steve Dimmock & Paula Holland. The inspiration for the garden came from a personal, temporary experience of sight loss and to mark 150 years of RNIB in 2018. read more
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