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Sea barley

Hordeum marinum · Poaceae

The gardener's calendar

The right move for September

Ideal time to plant sea barley: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Family
Poaceae (grasses)
Type
Annual grass
Mature size
30 to 60 cm in height
Flowering
Spring to summer (April-July)
Foliage
Deciduous, light green linear leaves
Hardiness
Hardy, tolerates cold
Origin
Temperate coastal regions of Europe
Soil
Tolerates salty and poor soils

Care

Watering

Seabarley is a hardy plant that tolerates drought well once established. Water regularly after sowing to ensure good germination, then gradually space out watering. In natural coastal conditions, it thrives on rainfall alone. Avoid excess water, which can promote fungal diseases.

Light exposure

Choose a sunny location for optimal growth. Seabarley also tolerates partial shade, but fruiting will be less abundant. This plant remarkably tolerates sea spray and windy exposures, making it ideal for coastal gardens.

Soil and drainage

Seabarley adapts to poor, sandy, or even salty soils—this is its great strength. It doesn't require rich or improved soil. Good drainage is essential, however, to prevent root suffocation. It tolerates varied pH levels, from neutral to slightly alkaline.

Fertilizer

No fertilizer is necessary: seabarley thrives on poor soil. A moderate compost addition at sowing can promote initial germination, but excess nitrogen should be avoided as it would encourage leafy growth at the expense of fruiting.

Pruning and harvest

As an annual grass, seabarley doesn't need pruning. Simply let the plant complete its natural cycle. If you wish to harvest the grains, wait until the ears brown and dry naturally before cutting and threshing them.

Diseases and pests

Seabarley is very disease-resistant thanks to its adaptability and natural vigor. No preventive treatment is generally necessary. In cases of prolonged excess moisture, slight mildew may appear, but it disappears with aeration and the return of dry conditions.

Did you know?

Seabarley (Hordeum marinum) is the wild ancestor of cultivated barley (Hordeum vulgare), domesticated approximately 10,000 years ago in the Levant. Unlike its agricultural cousins, this coastal barley has retained its remarkable ability to tolerate soil salinity, making it a valuable plant for adapting crops to coastal zones or lands salinized by irrigation.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.