Samphire

Crithmum maritimum

vegetable

verifiedReviewed by the GreenScout Team

Samphire, also called rock samphire or sea fennel, is a salt-tolerant succulent with thin, needle-like leaves that offer a crisp, salty, mineral flavor prized in gourmet cuisine. Native to rocky coastal regions, it thrives in poor, well-drained soils and tolerates salinity that would harm most plants. The plant develops a woody base as it matures and can live for several years.

Common Problems

Select the problem your Samphire is experiencing to get a treatment guide.

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Root Rotchevron_right

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Overwateringchevron_right

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Mushy Stemschevron_right

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Slow Growthchevron_right

Care Guide

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Light

Full sun (6–8 hours daily); requires bright light for optimal flavor and growth.

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Water

Water sparingly; allow soil to dry significantly between waterings; drought-tolerant once established; excessive moisture causes rot.

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Soil

Well-draining, poor to moderately fertile soil; tolerates sandy, gritty, or rocky soil with pH 6.0–7.5; add perlite or sand for drainage.

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Fertiliser

Minimal or no fertilizer needed; poor soil is acceptable; excess nutrients reduce salt tolerance and flavor intensity.

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Temperature

Cool to moderate; prefers 50–70°F; frost-hardy to about 20°F; dislikes sustained heat above 80°F.

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Humidity

Low humidity (20–40%) preferred; excellent air circulation prevents fungal issues; salt-tolerant foliage.

Toxicity

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Entirely edible and safe; high in minerals but safe for regular consumption in culinary quantities.

Common Diseases

filter_dramaRoot Rotchevron_right scienceBotrytis Grey Mouldchevron_right

Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Frequently Asked Questions

Why does my Samphire tolerate salty, poor soil so well?

It's native to rocky coastal regions and evolved to thrive in poor, well-drained soils and salinity that would harm most plants — in the garden it actually performs worse in rich soil, since excess nutrients reduce its salt tolerance and flavor intensity.

How long does a Samphire plant live?

It develops a woody base as it matures and can live for several years — a long-term perennial addition to a coastal-style or gravel garden rather than an annual crop.