Arabis tricornuta Plant Care
Arabis tricornuta Rollins in Kearney & Peebles
Updated · Sources · How we source care data
Pennellia tricornuta is a species of flowering plant in the mustard family known by the common names Rincon Mountain rockcress and Chiricahua rockcress. It is endemic to Arizona in the United States, where it occurs in Cochise, Pima, and Santa Cruz Counties.
Every 7–10 days
Full sun to part shade
50–75°F
40–60%
At a glance
How do you care for Arabis tricornuta?
Water Arabis tricornuta every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to part shade. It prefers temperatures of 50–75°F (10–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Arabis tricornuta Native To?
What Is the Arabis tricornuta?
Arabis tricornuta (Arabis tricornuta) belongs to the Brassicaceae family within the Arabis genus. Arabis tricornuta is native to Arizona in the United States.
Arabis tricornuta displays a low-growing spreading perennial growth habit, reaching up to 0.5 ft tall with a spread of approximately 1.5 ft. Arabis tricornuta produces small white or pink flowers in clusters.
Leaf size: approximately 2 inches.
How Often Should You Water a Arabis tricornuta?
Arabis tricornuta 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 Arabis tricornuta Need?
Arabis tricornuta thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Temperature and Humidity Does the Arabis tricornuta Prefer?
Arabis tricornuta grows best at temperatures of 50–75°F. Arabis tricornuta prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a Arabis tricornuta?
Well-draining sandy loam with added organic matter. Good drainage is essential for Arabis tricornuta to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Arabis tricornuta?
Feed Arabis tricornuta 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 Arabis tricornuta?
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 Arabis tricornuta?
Arabis tricornuta can be propagated through seeds, division. Similar propagation techniques also apply to alpine rockcress plant care, which shares the same genus.
Is the Arabis tricornuta Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Arabis tricornuta, 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 Arabis tricornuta?
Arabis tricornuta is susceptible to aphids, caterpillars, flea beetles. 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 Arabis tricornuta Need?
Arabis tricornuta grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Arabis tricornuta is native to Arizona in the United States. In cooler regions, grow Arabis tricornuta as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Arabis tricornuta 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 Arabis genus — compare its care with other Arabis species on PlantoScan.
Arabis is part of the Brassicaceae plant family — browse all Brassicaceae genera and species.
Arabis tricornuta thrives in bright light and direct sun — see other bright-light plants.
More Arabis Species
Other Arabis species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Arabis tricornuta Rollins in Kearney & Peebles, family Brassicaceae (first published in J. Washington Acad. Sci. 29: 478 (1929)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Arabis tricornuta, 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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