Stipa diegoensis Plant Care
Stipa diegoensis Swallen
Updated · Sources · How we source care data
Thorneochloa is a genus of flowering plants belonging to the family Poaceae. It contains a single species, Thorneochloa diegoensis, commonly known as San Diego needlegrass.
Every 7–14 days
Full sun to partial shade
50–85°F
40–70%
At a glance
How do you care for Stipa diegoensis?
Water Stipa diegoensis every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–85°F (10–29°C) and 40–70% humidity. Fertilize it every 8 months during the growing season.
Where Is the Stipa diegoensis Native To?
What Is the Stipa diegoensis?
Stipa diegoensis (Stipa diegoensis) belongs to the Poaceae family within the Stipa genus. Stipa diegoensis is native to southern California and northern Baja California.
Stipa diegoensis displays a clump-forming grass growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Stipa diegoensis produces feathery panicles in shades of gold, silver, or purple.
Leaf size: approximately 12 inches.
How Often Should You Water a Stipa diegoensis?
Stipa diegoensis requires watering every 7–14 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 7–14 days
Let soil partially dry between waterings
What Light Does the Stipa diegoensis Need?
Stipa diegoensis thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Stipa diegoensis Prefer?
Stipa diegoensis grows best at temperatures of 50–85°F. Stipa diegoensis prefers humidity levels of 40–70%.
Temperature
50–85°F
Humidity
40–70%
What Soil Mix Works Best for a Stipa diegoensis?
Well-draining sandy soil with good aeration. Good drainage is essential for Stipa diegoensis to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Stipa diegoensis?
Feed Stipa diegoensis every 8 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 8 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 Stipa diegoensis?
Divide and 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 Stipa diegoensis?
Stipa diegoensis can be propagated through division, seed sowing. Similar propagation techniques also apply to needle grass plant care, which shares the same genus.
Is the Stipa diegoensis Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Stipa diegoensis, 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 Stipa diegoensis?
Stipa diegoensis is susceptible to aphids, grasshoppers, cutworms. 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 Stipa diegoensis Need?
Stipa diegoensis grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Stipa diegoensis is native to southern California and northern Baja California. In cooler regions, grow Stipa diegoensis as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Stipa diegoensis 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 Stipa genus — compare its care with other Stipa species on PlantoScan.
Stipa is part of the Poaceae plant family — browse all Poaceae genera and species.
Stipa diegoensis thrives in bright light and direct sun — see other bright-light plants.
More Stipa Species
Other Stipa species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Stipa diegoensis Swallen, family Poaceae (first published in J. Washington Acad. Sci. 30: 212 (1940)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Stipa diegoensis, 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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