Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

Purple three awn (Aristida purpurea) is a perennial bunchgrass known for its graceful, upright form and striking seed heads. The base of the plant appears green, while its feathery seed heads range in color from light brown to reddish-purple, creating a dynamic visual effect as they sway in the wind. This resilient grass thrives in various habitats across the United States, including deserts, mountains, and coastal regions.

Purple three awn's seeds provide food for some songbirds, supporting wildlife in natural landscapes. The grass also serves as a valuable native alternative to invasive species, offering a durable and low-maintenance option for landscaping. Its dense root system helps stabilize the soil and creates a matrix that supports the growth of wildflowers, enhancing biodiversity.

Purple three awn is a tough and attractive plant, its seeds can be sharp and may become a nuisance in areas with heavy foot traffic. The grass self-seeds readily, so it is important to manage young plants to prevent unwanted spread.

This hardy bunchgrass is a beautiful addition to native gardens and restoration projects, offering both aesthetic value and ecological benefits.


Plant type

Grass

Size

2 - 3 ft Tall
2 ft Wide

Form

Fountain

Dormancy

Evergreen

Fragrance

None

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Color

Red, Purple, Cream, Brown

Flowering season

Spring, Winter

Special uses

Groundcover, Lawn alternative

Sun

Full Sun

Water

Very Low, Low

Summer irrigation

Max 1x / month once established

Ease of care

Easy

Cold tolerance

Tolerates cold to -20° F

Soil drainage

Fast, Medium

Soil description

Tolerates a variety of soils.
Soil PH: 6.5 - 7.5

Maintenance

Avoid cutting back the plant if possible. Remove old seed heads by gently pulling.

Propagation

By seed. This plant readily seeds itself and, like other grasses, it can be mildly invasive in the garden. New young plants can be easily removed by pulling.

Site type

Sandy or rocky soils, slopes, plains

Plant communities

Coastal Sage Scrub, Creosote Bush Scrub, Joshua Tree Woodland

Can be used with a very wide variety of other plants from the mountains, deserts or coast. Examples include Creosote Bush (Larrea tridentata), Sagebrush (Artemisia spp.), Joshua Tree (Yucca brevifolia), Brittlebush (Encelia spp.), Buckwheat (Eriogonum spp.), and various cactus and succulent species.