Eastern Gamagrass 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 5 through 9. It roots deep, which helps it reach moisture in a dry spell and open up tight soil as it establishes.
Zones
5-9
pH Range
5.5-7.5
Sun
Part Sun
Days to Maturity
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Score Eastern Gamagrass on your exact land.
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See Eastern Gamagrass
What Eastern Gamagrass is
Eastern Gamagrass grows as a perennial and reaches around six feet at maturity. It blooms yellow in late spring.
How to grow Eastern Gamagrass
Eastern Gamagrass grows in USDA zones 5 through 9. Eastern Gamagrass does best in part sun — at least 4 hours of direct sun a day — and soil from pH 5.5 to 7.5, on evenly moist to well-drained ground. It needs a growing season of at least 140 frost-free days, which is why climate matters as much as soil.
USDA Zones
5-9
USDA PHZM 2023
Soil pH
5.5 - 7.5
USDA PLANTS Database
Sun
Part Sun
plant_species_v5.csv
Drainage
poorly (saturated >50% of year), well (dry spells)
plant_species_v5.csv
Frost Tolerance
44.6°F
plant_species_v5.csv
Mature Height
6 ft
plant_species_v5.csv
Frost-Free Days
140+
plant_species_v5.csv
Start the season right
Plant eastern gamagrass in part sun with at least 4 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Eastern Gamagrass prefers pH 5.5 to 7.5 (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 eastern gamagrass 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 — eastern gamagrass isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Eastern Gamagrass isn't classified as a notable pollinator plant in our data — pair it with high-value bloomers nearby to feed bees.
Where Eastern Gamagrass thrives
Eastern Gamagrass is hardy across USDA zones 5 through 9. 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 5–9·Where Eastern Gamagrass growsOpen map →
On USDA hardiness-zone overlap, Eastern Gamagrass can grow in these states:
See if Eastern Gamagrass will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether eastern gamagrass 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 Eastern Gamagrass in my zone?
Eastern Gamagrass grows in USDA hardiness zones 5 through 9 (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 Eastern Gamagrass?
Most growers plant eastern gamagrass after the last spring frost, once the soil has warmed, leaving enough of the season for its 140-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 Eastern Gamagrass need?
Eastern Gamagrass does well in partial sun — around 4 hours of direct sun, and it takes some afternoon shade in stride. That flexibility makes it a good match for a bed the house or a nearby tree shades for part of the day. A Growable Ground report maps how the sun actually falls on your land, hour by hour, so you can set it where the light lines up.
What soil does Eastern Gamagrass need?
Eastern Gamagrass prefers soil pH 5.5 to 7.5, on evenly moist to well-drained ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Eastern Gamagrass attract pollinators?
Eastern Gamagrass isn't classified as a notable pollinator plant in our data. Pairing it with high-value bloomers nearby keeps bees and butterflies fed.
Is Eastern Gamagrass safe for pets?
Eastern Gamagrass is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.