European Marram Grass (Ammophila arenaria)

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Sunlight Full sun exposure required; tolerates coastal wind and salt spray without damage

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Watering Drought-tolerant; relies on natural coastal sand moisture, with minimal supplemental watering needed

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Temperature Hardy to -10°C; tolerates hot coastal summers and cool, windy winters

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Leaf: Narrow, rolled, grey-green blades with sharp tips; up to 1 m long
Flower: Dense, cylindrical spikelets on upright stems; pale green to straw-colored
Root: Extensive rhizome system that anchors sand and stabilizes dunes

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Watering

Allow sand to dry completely between rare supplemental waterings; avoid overwatering

Fertilization

No regular fertilization needed. Coastal sand provides sufficient nutrients; fertilizing may encourage excessive, weak growth

Composted banana peel extract：Use only if growth is stunted; dilute 1:40 for root drench; avoid over-application to prevent nutrient buildup

Pruning

Trim back dead, brown foliage in early spring to promote fresh new growth
Remove mature seed heads to prevent unwanted spread beyond intended dune areas
Thin overcrowded clumps every 2–3 years to maintain air circulation and growth vigor

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Culture: Symbolizes coastal resilience and ecosystem protection

Usage: Coastal erosion control; ornamental grass for seaside landscapes