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Summary
Blue grama is a warm-season, drought-hardy native bunchgrass best known for its eyelash- or “toothbrush”-like seedheads and its role as a keystone prairie species. For foragers, the small grains are genuinely tasty—barley-like when toasted or boiled—but they take patience because the chaff is clingy and each plant carries only a modest number of grains. As a horticultural grass it excels in hot, dry sites, low-input meadows, and water-wise lawns. Expect dependable summer growth, excellent heat tolerance, and elegant, tan seedheads that persist into winter. USDA Hardiness Zones: typically 3–9 (locally to 10 in arid regions). Size: foliage 15–50 cm tall; flowering culms 30–70 cm; clumps 30–60 cm wide, forming wider colonies over time.
Physical Characteristics

Bouteloua gracilis is a PERENNIAL growing to 0.6 m (2ft) by 0.6 m (2ft in).
See above for USDA hardiness. It is hardy to UK zone 4. It is in flower from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.
UK Hardiness Map
US Hardiness Map
Synonyms
B. oligostachya.
Plant Habitats
Cultivated Beds;
Edible Uses
Seed - raw or cooked[257]. It can be ground into a powder, mixed with water and eaten as a mush, often with corn meal[257]. It is also used to make bread[257]. Edible Uses & Rating: The grains are edible and were traditionally parched and made into porridge or meal. Flavor is notably pleasant for a wild grass—rounded, cereal-sweet, without swampy overtones. Yield per plant is modest and de-chaffing is tedious, so it’s a “quality over speed” grain [2-3]. Edibility rating: 3.5/5 for flavor, 3/5 overall (processing effort and low per-plant yield keep it from being a staple). Taste, Processing & Kitchen Notes: Freshly harvested grains are delicate; toasting takes seconds—listen for the light crackle and pull before scorching. Toasted grains smell nutty and taste barley-like. For hot cereal, boil 5–10 minutes; the cooked texture is pleasantly soft with a mild chew. Chaff removal is the challenge: parch (light dry toast), rub, then winnow repeatedly on a calm day. A coarse sieve followed by a final winnow improves cleanliness. If you don’t want to battle chaff, make a grain beverage: pound whole spikelets, simmer 20–30 minutes, then filter through fine cloth; reduce for a sweeter, thicker drink [2-3]. Seasonality (Phenology: A warm-season grass that initiates growth with rising soil temperatures in late spring. Flowering and grain fill track summer rains; in good years you may see two flushes. Primary harvest runs August–November at most elevations; at low, hot sites the first crop can mature earlier. Harvest & Processing Workflow: Hand-strip or clip straw-colored, fully dry seedheads into a breathable sack. Air-dry a few days. Parch lightly, then rub between hands or on a coarse screen to free grains. Winnow in light, steady air. For meal, toast a second time and grind; for porridge, simmer 5–10 minutes with 4–6 parts water. For a beverage, pound whole spikelets, simmer, and filter through fine cloth; reduce to taste. Cultivar/Selection Notes: Widely used selections include range-type sources such as ‘Hachita’, ‘Lovington’, and ‘Bad River’ for uniform, drought-hard turf and forage; ornamental forms like ‘Blonde Ambition’ are grown for tall, showy, long-lasting seedheads. Choose regional ecotypes for restoration fidelity and superior establishment. Look-Alikes & Confusion Risks: Six-weeks grama (Bouteloua barbata) is an annual with delicate plants and very small grains; sideoats grama (B. curtipendula) bears many dangling spikelets along one side of the stem rather than a few eyelash-like terminal combs. Buffalo grass (often placed apart as Buchloë dactyloides) forms a finer, stoloniferous sod with different flowering structures. If in doubt, look for the 1–3 terminal “eyelash” spikes and hairy ligule of blue grama. Traditional/Indigenous Use Summary: Across the Southwest and Plains, blue grama grains were gathered, parched, and ground for porridge or mixed with other meals. Harvest often followed summer rains when heads matured in waves; processing included parching, rubbing, and winnowing, with some communities brewing grain beverages when chaff separation was impractical.
References More on Edible Uses
Medicinal Uses
Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Salve Women's complaints
The chewed roots have been applied to cuts[257]. A decoction of the whole plant has been used as a post-partum medicine[257].
References More on Medicinal Uses
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Other Uses
Basketry Broom Brush
The grass is sometimes used in the fill of coiled basketry[216, 257]. The stems can be used as a comb and broom material[257]. The blades can be bundled by a cord and the stiff end used as a hair comb whilst the other end can be used as a broom[257]. Ecology & Wildlife: High wildlife value despite its small stature. It is prime forage for bison and ungulates, forms nesting and foraging structure for ground-nesting birds and invertebrates, and its dense fibrous roots stabilize soils and enhance infiltration. As a C4 grass it exhibits high water-use efficiency and strong heat tolerance.
Special Uses
References More on Other Uses
Cultivation details
Full sun is essential. Blue grama thrives on well-drained loams, sandy loams, and even clays if not waterlogged; pH 6–8.5 tolerated, including calcareous soils. It is highly drought-tolerant once established and prefers sporadic deep soaks over frequent light irrigation. Fertility needs are low; excessive nitrogen promotes lodging and weeds. Best performance in regions with 250–600 mm annual precipitation (supplemental water extends green season in drier zones). Easily grown in full sun on any well-drained garden soil[200]. Prefers a near-neutral or lime-free soil[200]. This species is not hardy in the colder areas of the country, it tolerates temperatures down to between -5 and -10°c[200]. All members of this genus use the method of photosynthesis knwn as C4. This allows for the more effective capture of carbon dioxide and thus less water loss through transpiration since the stomata do not have to be open for transpiration. This is an advantage in the arid environments where these plants are usually found[274]. Identification & Habit: A perennial C4 bunchgrass (often forming short sods by tillering) with narrow, gray-green to blue-green leaves that curl slightly in drought. Culms are erect, each terminating in 1–3 unilateral, comb-like spikes (spicate branches) that look like a tiny eyebrow or toothbrush. Ligules are a fringe of hairs. Spikelets line one side of each spike; awns are short and not dangerously barbed. Plants green up late spring, flower in summer, and cure attractively straw-tan by autumn. Native across the Great Plains, Southwest, and central Rockies, extending from Texas to California and north to Montana, the Dakotas, and Minnesota, and into the Canadian Prairies. Common in shortgrass steppe, open pinyon-juniper, dry mesas, and roadsides, often as a dominant with buffalo grass and other gramas. Size & Landscape Performance: Clumps typically 15–50 cm foliage with 30–70 cm flowering stalks, maintaining a tidy, upright habit. Excellent as a water-wise lawn alternative (mow 7–10 cm), in meadow plantings, and for erosion control. Summer seedheads float above the sward, then bleach gracefully for winter interest. Generally trouble-free. Over-irrigation encourages thatch and cool-season weeds. Heavy, repeated close grazing or mowing during drought can thin stands. As with all wild-harvested grains, molds or ergot can occur in bad years—discard any discolored or musty material.
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
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Plant Propagation
Seed - sow spring in a greenhouse. Only just cover the seed. Prick out the seedlings into individual pots when large enough to handle and grow on for at least the first winter in a greenhouse. Plant out in early summer. Division.
Other Names
If available other names are mentioned here
Native Range
NORTHERN AMERICA: Canada (Ontario, Alberta, Manitoba, Saskatchewan), United States (Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, Oklahoma, South Dakota, Wisconsin, Colorado, Idaho, Montana, Wyoming, Arkansas, New Mexico, Texas, Arizona, California, Nevada, Utah), Mexico (Chihuahua, Coahuila de Zaragoza, Durango, Nuevo León, San Luis Potosí, Sonora, Tamaulipas, Zacatecas, Aguascalientes, Ciudad de México, Guanajuato, Guerrero, Hidalgo, Jalisco, México, Michoacán de Ocampo, Morelos, Nayarit, Oaxaca, Puebla, Querétaro, Tlaxcala, Veracruz de Ignacio de la Llave)
Weed Potential
Right plant wrong place. We are currently updating this section.
Please note that a plant may be invasive in one area but may not in your area so it's worth checking.
Low. As a native it naturalizes politely and seldom becomes a nuisance. In well-watered, fertile soils it can be outcompeted by tall exotics; in lean, sunny sites it persists for decades.
Conservation Status
IUCN Red List of Threatened Plants Status :
Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.
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Expert comment
Author
(Willd. ex Kunth.)Lag. ex Griffiths.
Botanical References
200236270
Links / References
For a list of references used on this page please go here
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Subject : Bouteloua gracilis
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