Photo: Millie BasdenCC BY 4.0via iNaturalistresized / cropped
Deer Grass Plant Care
Muhlenbergia rigens Hitchc.
Updated · Sources · How we source care data
Muhlenbergia rigens, commonly known as deergrass, is a warm season perennial bunchgrass. It is found in sandy or well-drained soils below 7,000 feet (2,100 m) in elevation in the Southwestern United States and parts of Mexico.
Every 7–14 days
Full sun to partial shade
60–85°F
40–70%
At a glance
How do you care for Deer Grass?
Water Deer Grass 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 60–85°F (16–29°C) and 40–70% humidity. Fertilize it every 8 months during the growing season.
Where Is the Deer Grass Native To?
What Is the Deer Grass?
Deer Grass (Muhlenbergia rigens) belongs to the Poaceae family within the Muhlenbergia genus. Deer Grass is native to sandy or well-drained soils below 7,000 feet (2,100 m) in elevation in the Southwestern United States and parts of Mexico. Deer Grass is also known as Rigid Muhly.
Deer Grass displays an upright, clumping grass growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Deer Grass produces small, inconspicuous flowers in spikelets.
Leaf size: approximately 12 inches.
How Often Should You Water a Deer Grass?
Muhlenbergia rigens 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 Deer Grass Need?
Deer Grass thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Deer Grass Prefer?
Muhlenbergia rigens grows best at temperatures of 60–85°F. Deer Grass prefers humidity levels of 40–70%.
Temperature
60–85°F
Humidity
40–70%
What Soil Mix Works Best for a Deer Grass?
Well-draining sandy soil with good aeration. Good drainage is essential for Deer Grass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Deer Grass?
Feed Deer Grass 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 Deer Grass?
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 Deer Grass?
Deer Grass can be propagated through seeds, division of clumps. Similar propagation techniques also apply to pink muhly grass plant care, which shares the same genus.
Is the Deer Grass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Deer Grass, 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 Deer Grass?
Deer Grass is susceptible to grasshoppers, aphids, spider mites. 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 Deer Grass Need?
Deer Grass grows outdoors in USDA Zone 7a – 10b. It survives winters down to planting zone 7a. Deer Grass is native to sandy or well-drained soils below 7,000 feet (2,100 m) in elevation in the Southwestern United States and parts of Mexico.
Hardiness Zone
Zone 7a – 10b
Keep exploring plants
Deer Grass 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 Muhlenbergia genus — compare its care with other Muhlenbergia species on PlantoScan.
Muhlenbergia is part of the Poaceae plant family — browse all Poaceae genera and species.
Deer Grass 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: Muhlenbergia rigens Hitchc., family Poaceae (first published in J. Washington Acad. Sci. 23: 453 (1933)) — World Flora Online record, IPNI name record, Wikidata.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Deer Grass, 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.
- Photo: Millie Basden, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 7a – 10b, estimated from the plant's typical growing conditions.
- 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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