Description
Crithmum maritimum is a perennial, halophytic herb naturally found along rocky coastlines and sea cliffs of the Mediterranean and Atlantic coasts. It forms low, spreading clumps with thick, fleshy, finely divided blue-green leaves that are rich in aromatic oils and minerals. In summer, it produces clusters of small greenish-yellow flowers typical of the carrot family, followed by ribbed seeds.
Exceptionally tolerant of salt spray, wind, drought, and poor soils, Rock Samphire thrives in full sun and sharply drained substrates, including sandy or rocky ground. Traditionally harvested as an edible wild plant, its leaves have a crisp texture and a fresh, salty, citrus-like flavor, used pickled, fresh, or cooked in Mediterranean cuisine. Ornamental, culinary, and resilient, Crithmum maritimum is well suited to coastal gardens, xeriscaping, and edible landscapes in dry, sunny climates.
Germination Guide
🌍 Mediterranean and Atlantic coasts, Europe, North Africa, West Asia, Black Sea
Moderate
Crithmum maritimum, commonly known as rock samphire or sea fennel, is a coastal halophyte native to Mediterranean and Atlantic regions. Seeds are best sown in autumn in a cold frame, with light partially covering them. Germination typically occurs within 3-6 weeks at 15°C, though germination can extend 30-60 days after cold stratification.
Germination
Germination time
Expect germination in
7 – 60 days
Temperature
Min 15°C
Ideal 15°C
Max 22°C
🌡️ Temperature alternation recommended
— Warm stratification (20-22°C) for 4 weeks, then cold stratification (4°C) for 4 weeks if no germination occurs.
Substrate moisture
💧 Medium
Sowing depth
Lightly covered
Substrate & Container
Recommended substrate
sandy loam, light gravel, well-draining compost
Recommended container
cold frame, seed trays
Growing Tips
Best sown fresh in autumn immediately after ripening. Seeds have short viability. Light is beneficial for germination. Keep substrate moist but not waterlogged. Ascorbic acid (40-60 mM) or ethanol (96%) pretreatment can improve germination rates. Seeds germinate better in distilled water rather than saline conditions, despite the plant being salt-tolerant. Once seedlings are large enough, transplant to individual pots and grow on in well-lit conditions.
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