Valerianella locusta 'Coquille de Louviers' is an early, cold-hardy mâche variety originating from Louviers, Normandy, France, characterized by distinctive spoon-shaped, dark green leaves and mild, nutty flavor. Seeds germinate reliably between 5-20°C, with optimal germination occurring at 17°C within 7-15 days, making it ideal for succession sowing every 2-3 weeks for continuous winter harvests.
Before sowing
Hot water treatment or 24-hour seed soaking can prevent seed-borne diseases and improve germination.
Sowing
What to expect
Tips
Sow seeds lightly covered or at soil surface, pressing gently into contact; soil temperatures above 20°C induce dormancy, so avoid sowing in warm weather. Direct sowing in early spring or late summer (July-October) is preferred for fall/winter production. Keep soil consistently moist during germination. Thin seedlings to 3-6 inches apart; space rows 20-25 cm apart. This variety excels in cool seasons and can tolerate temperatures down to -15°C with proper protection. Provide full sun to partial shade; partial shade in summer helps prevent bolting. Harvest outer leaves continuously or cut entire rosettes when 2-3 inches tall. Practice succession planting every 2-3 weeks for year-round supply. Germination may be slow and variable; patience is essential. Soaking seeds for 24 hours before sowing can improve germination rates.
Sources: Bioponis, Experimental Farm Network Seed Store, Saemereien, Silence ça pousse, Jardin du Pic Vert, Willemse France, Ferme de Sainte-Marthe, Baker Creek Heirloom Seeds, Eden Brothers, Balcony Garden Web, Underwood Gardens, Johnny's Selected Seeds, Bumble Seeds, Missouri Botanical Garden, Botanikks, Plants for a Future, Plant What When
