Lawn Care
Blue Grama Grass: Mowing Height, Seeding and Low-Water Care
Quick answer
Blue grama is a native warm-season bunchgrass for dry regions from zone 3 to zone 10. Mow it at 2 to 3 inches or leave it unmown, feed at most 1 to 2 pounds of nitrogen a year, and water rarely once established. It stays in clumps and does not fill bare spots.
Blue grama is a fine-leaved native shortgrass of the Great Plains and intermountain West, best known for its seedheads: narrow, curved spikes that hang off the stem like eyelashes and stay attractive into winter. It is extremely cold hardy, extremely drought tolerant, and it asks for less water and fertilizer than any conventional lawn grass in its range.
The honest limitation is its growth habit. Blue grama is a bunchgrass, so it grows in clumps and spreads very little, which means it does not knit into a uniform carpet or repair worn spots the way a stoloniferous grass does. It is at its best as a low-input or unmown native lawn, and it is often sown together with buffalograss, whose stolons fill the spaces between the clumps.
On this page
What are the key numbers for blue grama?
| Trait | Blue grama |
|---|---|
| Season type | Warm-season native; greens late in spring, tan through winter |
| USDA zones and region | Zones 3 to 10; Great Plains, Rocky Mountain states and the high Southwest |
| Mowing height | 2 to 3 in, or leave unmown at about 4 to 6 in |
| Seeding rate | Not in our seed rate table: follow the bag, and note native seed is often sold by pure live seed |
| Germination | About 10 to 21 days once soil holds 60 to 70 F |
| Shade tolerance | Poor; it needs full sun |
| Drought tolerance | Excellent; adapted to roughly 10 to 20 inches of annual rainfall |
| Wear and traffic | Fair; light use, and clumps do not repair themselves quickly |
| Nitrogen per year | 0 to 2 lb N per 1,000 sq ft; many stands are never fed |
| Soil pH | 6.5 to 8.5; well suited to alkaline western soils |
| Spreading habit | Bunch-type; spreads very little and will not close bare spots |
| Signature feature | Curved one-sided seedheads that persist into winter |
Guidance follows Plains and mountain-state extension sources. Native seed is often labeled in pure live seed, so bag rates are not directly comparable to turf seed rates.
How does blue grama compare with buffalograss and fine fescue?
| Trait | Blue grama | Buffalograss | Fine fescue |
|---|---|---|---|
| Season type | Warm-season | Warm-season | Cool-season |
| Growth habit | Bunch-type | Spreads by stolons | Bunch-type, creeping red has short rhizomes |
| Region | Dry Plains and mountain West | Dry Plains | Cool humid North |
| Water once established | Very low | Very low | Low |
| Shade tolerance | Poor | Poor | Best of the three |
| Mowing height | 2 to 3 in or unmown | 2 to 3 in or unmown | 2.5 to 4 in, or unmown |
| Nitrogen per year | 0 to 2 lb | 1 to 2 lb | 1 to 2 lb |
| Fills bare spots | No | Slowly, by stolons | Barely |
In the dry West the choice is usually blue grama, buffalograss or a mix of both. Fine fescue is the low-input answer in cool, humid regions instead.
Do you have to mow blue grama grass?
No. Blue grama tops out low enough that many owners leave it unmown at roughly 4 to 6 inches, which keeps the curved seedheads that are the best thing about it and gives a soft prairie look. Mowed at 2 to 3 inches it reads more like a conventional lawn and loses most of the seedheads, and even then it usually needs cutting only a few times through the warm season.
Two practical cautions. Check local weed ordinances and HOA rules before committing to an unmown lawn, since some define maximum grass height. And because this grass grows in clumps, mowing will not disguise gaps: a thin stand looks thin at any height. A simple walk-behind is all this lawn needs, and the options are in the best push lawn mowers. Heights for every grass are in the mowing height chart.
How do you plant blue grama from seed?
Sow in late spring or early summer once soil holds 60 to 70 F, into a firm, weed-free seedbed. Native seed is commonly sold as blue grama seed or inside a native dry-lawn mix, often labeled by pure live seed rather than bulk weight, so read the bag rather than applying a generic turf rate.
Blue grama seed is light and chaffy, which makes it awkward in some spreaders. A broadcast unit with a real gearbox such as the EarthWay 2150 Commercial 50 lb Broadcast Spreader handles it better than a small hopper, and mixing seed with a carrier like sand improves the spread pattern; the best lawn spreaders compares sizes. Keep the seedbed damp until seedlings are established with a timer such as the Melnor AquaTimer 4-Zone Programmable Digital Hose Timer, then taper irrigation deliberately so roots chase moisture downward. First-season weed control matters, since slow seedlings are easily out-grown: see when to apply pre-emergent, remembering that most pre-emergents also stop grass seed.
What gear fits a native blue grama lawn?
Almost nothing, which is the appeal. A spreader for seeding, a mower for a few cuts a season, and a sprayer for the first-season weeds.
Greenworks 60V 21 in. Push Mower Kit
$389.99A 21 inch battery push mower kit with battery and charger, sized for a lawn cut a few times a season rather than weekly.
Best for: light mowing of a native lawn
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EarthWay 2150 Commercial 50 lb Broadcast Spreader
$279.99A 50 lb commercial broadcast spreader with an enclosed gearbox, slide-out grate and pneumatic tires that handles light, chaffy seed better than small hoppers.
Best for: seeding native grass over large areas
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Chapin 16200 2-Gallon Pump Sprayer
$26.44A 2 gallon poly pump sprayer with an adjustable cone nozzle and in-tank filter, for spot treatments while a slow native stand fills in.
Best for: spot weed control per the label
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Melnor AquaTimer 4-Zone Programmable Digital Hose Timer
$69.99A four valve digital hose timer with schedules from hourly to weekly, easy to taper off once the stand is rooted.
Best for: the first season only
Check price on AmazonHow we chose
We did not test these products in person. Picks are researched from manufacturer specifications and owner manuals, engine and safety certifications where they apply, warranty terms, public recall records, and the recurring themes in verified owner reviews. We favor established brands with large review counts and parts support, match each pick to a real yard size or task, and place it in the tier where its price and capability actually belong.
Frequently asked questions
Will blue grama spread and fill in bare spots?
Not meaningfully. Blue grama is a bunchgrass, so each plant widens slowly at the base but sends out no stolons or rhizomes to creep across open ground. Gaps stay gaps unless you reseed them or interplant something that spreads. This is the main reason blue grama is often sown with buffalograss, whose stolons run between the clumps and close the stand.
Is blue grama good for a lawn or just a prairie planting?
It works as both, with different expectations. Mowed at 2 to 3 inches in a dry, sunny yard it makes a legitimate low-water lawn, thinner and more clumpy than conventional turf. Left unmown it is a prairie planting with attractive curved seedheads. What it will not do is take heavy foot traffic or look like an irrigated bluegrass lawn.
How much water does blue grama need?
Very little once established, since it is adapted to roughly 10 to 20 inches of annual rainfall across its native range, and many stands get no supplemental water at all. It browns during hot dry stretches and recovers with rain. Watering and feeding it like a conventional lawn mostly encourages weeds and more aggressive grasses to move into the stand.
Researched, not professional advice. This page is compiled from published specifications, manuals, labels and owner-review consensus, not hands-on testing. Follow the manufacturer's instructions and product label, and consult a qualified professional where safety, chemicals, fuel or structures are involved. As an Amazon Associate we earn from qualifying purchases.