American Beachgrass grows well for those who pay attention.

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American Beachgrass

Ammophila breviligulata

Zones 1–9

Growing

This hardy grass is an exceptional choice for stabilizing sandy landscapes and controlling erosion on slopes. When establishing a new stand, you can start from seed or use division to expand your coverage. While it spreads quickly via underground runners and rhizomes to form a dense mat that suppresses weeds, be careful not to walk on established plants, as the foliage can be damaged easily by foot traffic. If you are planting in a container, ensure the medium provides excellent drainage, as the plant does not tolerate waterlogged conditions.

To ensure a healthy stand, keep an eye out for Marasmius blight, a fungal disease that can cause circular patches of dying plants. This blight creates mycelium that binds leaf sheaths to the stems and can even produce small mushrooms near the soil line, eventually disrupting the plant's ability to transport nutrients. You may also encounter root-knot nematodes, which are parasites that cause galls to form on the lateral roots. While this grass is highly tolerant of salt and can thrive in coastal environments, it prefers soil that is not overly saline during the germination phase.

Stats
Sunfull sun
Waterlow
Grow time—
Height3–6ft
Spacing12–24in
Light
Full sun✓
Part shade✗
Shade✗
Traits
Life cycleperennial
Categorygrass
Growth habitupright
Frost tolerancehardy
Height3–6ft
Spacing12–24in
Native us✓
Growing
Waterlow
Drainagewell drained
Soil ph min4.5
Soil ph max—
Propagation
Seed✓
Cutting✗
Division✓
Graft✗
Tuber bulb crown✗
Transplant✓
Container ok✓
Spreadrunners
Deer resistant✗
Drought tolerant✓
Toxic to
People—
Pets—
Livestock✗
Bloom
Lengthunder 2wk
Colors
White✗
Yellow✗
Orange✗
Red✗
Pink✗
Purple✗
Blue✗
Green✗
Cover
Mat heightover 12in
Spread ratefast
Foot trafficnone
Evergreen—
Lawn alternative✗
Mowable✓
Between pavers✗
Erosion control✓
Weed suppression✓
Under trees✗
Invasive
Statusnoxious
Regions
Northeast✗
Southeast✗
Midwest✗
Plains✗
Southwest✗
Mountain west✗
Pacific northwest✓
California✗
Hawaii✗
State noxious✓
Escapes cultivation✓
Calendar, zone 7
JanFebMarAprMayJunJulAugSepOctNovDec
Sownonoyesyesyesyesyesyesyesnonono
Harvest————————————