Chaparral blooming Plant Care
Romneya trichocalyx Eastw.
Updated · Sources · How we source care data
Romneya trichocalyx, the bristly Matilija poppy or hairy Matilija poppy, is a species of flowering plant in the poppy family. This poppy is native to San Diego, Ventura, and Santa Barbara counties in California, as well as Baja California, Mexico, where it grows in dry canyons in chaparral and coastal sage scrub plant communities.
Every 7–10 days
Full sun to partial shade
50–80°F
40–60%
At a glance
How do you care for Chaparral blooming?
Water Chaparral blooming every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Chaparral blooming Native To?
What Is the Chaparral blooming?
Chaparral blooming (Romneya trichocalyx) belongs to the Papaveraceae family within the Romneya genus. Chaparral blooming is native to San Diego, Ventura, and Santa Barbara counties in California, as well as Baja California, Mexico. Chaparral blooming is also known as Chaparral bloom, Coulter's matilija poppy, Matilija poppy.
Chaparral blooming displays a clump-forming perennial growth habit, reaching up to 4 ft tall with a spread of approximately 3 ft. Chaparral blooming produces large, white, papery flowers with yellow centers.
Leaf size: approximately 6 inches.
How Often Should You Water a Chaparral blooming?
Romneya trichocalyx requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Chaparral blooming Need?
Chaparral blooming thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Chaparral blooming Prefer?
Romneya trichocalyx grows best at temperatures of 50–80°F. Chaparral blooming prefers humidity levels of 40–60%.
Temperature
50–80°F
Humidity
40–60%
What Soil Mix Works Best for a Chaparral blooming?
Well-draining sandy loam with good organic content. Good drainage is essential for Chaparral blooming to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Chaparral blooming?
Feed Chaparral blooming every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Chaparral blooming?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Chaparral blooming?
Chaparral blooming can be propagated through division, seeds. Similar propagation techniques also apply to coulter's matilija poppy plant care, which shares the same genus.
Is the Chaparral blooming Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Chaparral blooming, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Chaparral blooming?
Chaparral blooming is susceptible to aphids, spider mites, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Chaparral blooming Need?
Chaparral blooming grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Chaparral blooming is native to San Diego, Ventura, and Santa Barbara counties in California, as well as Baja California, Mexico. In cooler regions, grow Chaparral blooming as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Chaparral blooming is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Romneya genus — compare its care with other Romneya species on PlantoScan.
Romneya is part of the Papaveraceae plant family — browse all Papaveraceae genera and species.
Chaparral blooming thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Romneya trichocalyx Eastw., family Papaveraceae (first published in Proc. Calif. Acad. Sci. , ser. 3, 1: 133 (1898)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Chaparral blooming, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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