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.
Eastern Gamagrass — the short answer
Eastern Gamagrass: grown in zones 5–9, part sun, pH 5.5–7.5.
- USDA zones
- 5–9
- Not verified — NC State Extension Gardener Plant Toolbox lists zones 6a–9a
- Soil pH
- 5.5–7.5
- FAO ECOCROP
- Sun
- Part Sun
- Growable Ground Plant Database
- Frost-kill temp (growing season)
- 30.2°F
- FAO ECOCROP
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
Score Eastern Gamagrass on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether eastern gamagrass actually takes — and those shift from one yard to the next. Enter your address and we'll score eastern gamagrass against your land's real conditions.
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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.
USDA Zones
5-9
Not verified — NC State Extension Gardener Plant Toolbox lists zones 6a–9a
Soil pH
5.5 - 7.5
FAO ECOCROP
Sun
Part Sun
Growable Ground plant catalog
Drainage
poorly (saturated >50% of year), well (dry spells)
Growable Ground plant catalog
Frost Kill Temperature
30.2°F
Where cold starts killing growing tissue. Not a winter-survival floor — a dormant perennial takes far colder, which its hardiness zone answers.
FAO ECOCROP
Minimum Growing Temperature
44.6°F
Below this it stops growing rather than dies — a pace limit, not a survival limit.
FAO ECOCROP
Mature Height
6 ft
Growable Ground plant catalog
Start the season right
Plant eastern gamagrass in part sun with at least 4 hours of direct sun. It grows in the cool halves of the year, so sow it in spring or late summer rather than waiting for midsummer heat.
Match the soil
Eastern Gamagrass prefers pH 5.5 to 7.5 (FAO ECOCROP). 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.
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.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 5–9 spans average winter lows from -20°F to 30°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 25 outright and splits 25 more down the middle — and which side of that line your land sits on changes the answer.
Zones 5–9·Where Eastern Gamagrass growsOpen map →
This map is derived from the USDA ARS / PRISM Plant Hardiness Zone Map (2023) and is not the official USDA Plant Hardiness Zone Map.
Where Eastern Gamagrass stands, state by state
Eastern Gamagrass is rated for zones 5–9 — a cold floor USDA puts at -20 to -10°F. Across the 50 states and DC, 25 sit fully inside that band, the line runs through 25 more, and 1 sits outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 5–9
25 states
3 of 25 shown
The line runs through
25 states
3 of 25 shown
Eastern Gamagrass’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.
Outside zones 5–9
1 state
- North Dakota · zones 3b-4b
Winter cold is the limit here — the same plant often works in a container that comes under cover. Each link is that state’s own growing hub.
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Eastern Gamagrass
Growing guides for eastern gamagrass
In rotation planning, eastern gamagrass counts as a Grass — beds recover best when grass crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)
Related plants in grass/groundcover
Good to know
Eastern Gamagrass isn't classified as a notable pollinator plant in our data — pair it with high-value bloomers nearby to feed bees.
Your land is one point inside Eastern Gamagrass's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
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.
25+ data sources analyzed in seconds
How we know this about Eastern Gamagrass
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database•ASPCA
Frequently asked questions
Can I grow Eastern Gamagrass in my zone?
Eastern Gamagrass grows in USDA hardiness zones 5 through 9. 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?
Eastern Gamagrass is a cool-season crop, so it goes in during the cool halves of the year — early spring, and again in late summer for a fall planting — rather than at the height of summer heat. 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 (FAO ECOCROP). 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.
Keep exploring Eastern Gamagrass
Eastern Gamagrass state by state
Every state eastern gamagrass's zone reaches — 19 link straight to that state's eastern gamagrass growing page; the rest open the state's full growing guide.