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.
Before sowing
Light stratification can increase success. Minimal pretreatment required.
Sowing
What to expect
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.
Sources: PFAF Plant Database, PubMed (scientific germination studies), Jelitto Perennial Seeds, Chiltern Seeds, Ferri Seeds, Plant World Seeds, Jardineriaon.com
