trefle.io · Taken May 2, 2021 by Sergio costantini (cc-by-sa)
Poaceae
Sea barley
Hordeum marinum
Also known as Wall barley, Sea barley grass, Mediterranean barley, Critesion marinum
Zones 3–10Sun Full SunWater ModerateCare Low
Native Plants · Ornamental · Grass · Coastal · Salt · Tolerant · Mediterranean · Hardy · Perennial
Pet-safeBeginner-friendlySalt-tolerantAttracts pollinators
Currently out of stock everywhereStock updated 9/6/2026
Sea barley is a hardy ornamental grass that thrives in full sun with minimal care. It tolerates salt spray and coastal conditions exceptionally well, making it ideal for seaside gardens. Water moderately and allow soil to dry between waterings for best results.
Growing conditions
The details behind the basics
- Daily light
- 6 hours
- Watering
- Water moderately, allow soil to dry between waterings · Every 10-14 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 7.5–8
- Temperature
- -40°F to 100°F
- Cycle
- Perennial
Hardiness
USDA 3a-10b
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Form & growth
Mature size and habit
- Mature height
- 12 in – 4 ft
- Spread
- 12 in
- Spacing
- 8 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Afghanistan, Albania, Algeria, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Austria, Azores, Baleares, Baltic States, Belgium, British Columbia, Bulgaria, California, Canary Is., Cape Provinces, Chile Central, Chile South, Corse
- Attracts
- Birds
Sources: trefle, usda
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