Blue Grama is a cover crop — grown to build and protect the soil rather than for a harvest of its own. It's hardy across USDA zones 3 through 10, shrugs off deer and shrugs off dry spells.
Zones
3-10
pH Range
4.5-8.5
Sun
Full Sun
Days to Maturity
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Score Blue Grama on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether blue grama actually takes — and those shift from one yard to the next. Enter your address and we'll score blue grama against your land's real conditions.
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See Blue Grama
What Blue Grama is
Blue Grama reaches around a foot at maturity. It blooms yellow in mid summer. It's also deer-resistant.
How to grow Blue Grama
Blue Grama grows in USDA zones 3 through 10. Blue Grama does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.5 to 8.5, on well-drained to fast-draining ground. It needs a growing season of at least 90 frost-free days, which is why climate matters as much as soil.
USDA Zones
3-10
USDA PHZM 2023
Soil pH
4.5 - 8.5
USDA PLANTS Database
Sun
Full Sun
plant_species_v5.csv
Drainage
well (dry spells), excessive (dry/moderately dry)
plant_species_v5.csv
Frost Tolerance
35.6°F
plant_species_v5.csv
Mature Height
1 ft
plant_species_v5.csv
Frost-Free Days
90+
plant_species_v5.csv
Start the season right
Plant blue grama in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Blue Grama prefers pH 4.5 to 8.5 (USDA PLANTS Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.
Water steadily
Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.
Turn it in before it seeds
Cut blue grama down or turn it into the soil before it sets seed, while the growth is still green — that's when it returns the most to the ground.
Good to know
Good news for pet owners — blue grama isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Blue Grama isn't classified as a notable pollinator plant in our data — pair it with high-value bloomers nearby to feed bees.
Where Blue Grama thrives
On hardiness alone, blue grama grows across most of the country — its range (USDA zones 3 through 10) is unusually wide. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
Zones 3–10·Where Blue Grama growsOpen map →
On USDA hardiness-zone overlap, Blue Grama can grow in these states:
See if Blue Grama will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether blue grama actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Frequently Asked Questions
Can I grow Blue Grama in my zone?
Blue Grama grows in USDA hardiness zones 3 through 10 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Blue Grama?
Most growers plant blue grama after the last spring frost, once the soil has warmed, leaving enough of the season for its 90-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Blue Grama need?
Blue Grama needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.
What soil does Blue Grama need?
Blue Grama prefers soil pH 4.5 to 8.5, on well-drained to fast-draining ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Blue Grama attract pollinators?
Blue Grama isn't classified as a notable pollinator plant in our data. Pairing it with high-value bloomers nearby keeps bees and butterflies fed.
Is Blue Grama safe for pets?
Blue Grama is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.