Mâche

Mâche (Valerianella locusta) sells for $6-10/lb at the handful of specialty grocers that carry it fresh (USDA AMS Specialty Crop Market News, 2023). It survives temperatures to 5°F without protection and continues growing slowly through winter in zones 6+. You are unlikely to find it at your local grocery store - which is exactly the condition that makes it worth growing.

What you’re actually growing

Mâche is also called corn salad and lamb’s lettuce - the former because it historically volunteered in grain fields, the latter because the small, rounded leaves grow in rosette clusters that superficially resemble the shape of a lamb’s ear. It is in the valerian family (Caprifoliaceae), unrelated to lettuce.

The plant grows as a low rosette, 4-6 inches in diameter, with smooth, dark green oval leaves that have a velvety texture. Flavor is mild and nutty - distinctly different from lettuce or spinach, and one reason chefs prize it for composed salads where they want flavor without bitterness. In French cuisine it is a standard winter salad ingredient; in the US it rarely appears outside high-end restaurants.

The main growing distinction among varieties is seed size. ‘Vit’ (also sold as ‘Coquille’) has very small seeds and quick germination. ‘Cavallo’ produces large rosettes. ‘D’Olanda’ is a Dutch-bred type with good cold tolerance and reliable germination.

The ROI case

A $2.99 packet seeds 8-10 row feet of mâche. Direct sow in late summer for fall and winter harvest - late August through September in zones 5-7. Each plant is a small rosette; you harvest the entire rosette or take outer leaves and let the center continue growing. At 2-3 oz per rosette (a generous individual serving) and 12 plants per row foot, a 10-foot row holds enough plants to produce 1.5-2.5 lb of mâche over the season.

At $6-10/lb (USDA AMS, 2023), a 10-foot row returns $9-25. The volume yield is lower than most greens, but mâche occupies a slot nothing else does: a cold-tolerant, premium-priced green that grows when the garden is otherwise empty. The opportunity cost is near zero.

Growing requirements

Mâche is a cool-season annual that bolts quickly in warm weather. Soil temperatures above 70°F impair germination, and plants that survive into warm spring weather will bolt to seed within days. This is a fall through early spring crop.

Direct sow 0.25 inches deep, 1 inch apart in rows 6-8 inches apart. Seeds are tiny and can be broadcast if you mix them with sand for even distribution. Thin to 4-6 inches between plants once germination is complete - crowded rosettes are more susceptible to damping-off and gray mold.

Soil pH 6.0-7.0. Mâche germinates and grows in low-fertility soil without complaint. Light compost amendment at planting is sufficient; heavy fertility drives rapid growth that reduces the cold hardiness advantage by producing lush, soft leaves prone to frost damage.

Water lightly - 0.5 inches per week in fall when rain is more frequent. Mâche tolerates wet conditions better than most salad greens, but standing water causes crown rot. Avoid overhead irrigation in cool, cloudy weather, which promotes gray mold on the dense rosettes.

In zones 5-6, a cold frame or row cover extends the harvest window through late November and into December. Without protection, hard freezes below 5°F kill the plants.

What goes wrong

Gray mold (Botrytis cinerea) is the most common problem, appearing as fuzzy gray growth on leaves in wet, cold conditions. Improve airflow and reduce humidity around plants by thinning aggressively. Remove affected rosettes promptly. Copper fungicide provides preventive protection in chronically wet falls.

Slugs feed on the low rosettes at night and leave irregular holes in leaves. Iron phosphate baits applied at planting are effective and safe around vegetables. Diatomaceous earth around plant bases provides partial physical barrier.

Damping-off (Pythium spp.) kills seedlings in the first 2 weeks. Avoid sowing in waterlogged soil. If starting in trays, use sterile seed-starting mix.

Mâche can self-seed aggressively after plants bolt in spring. If you want to contain it, harvest or pull plants before they flower. Self-seeded volunteer plants germinating in fall are a bonus if you’re not managing the bed for another crop.

Harvest and storage

Harvest individual rosettes by cutting at the base with scissors or pulling the entire plant. Small, young rosettes (3-4 inches across) have the best texture and flavor. Older plants before bolting are still edible but the texture coarsens slightly.

Fresh mâche keeps 3-5 days refrigerated. Handle gently - the leaves bruise easily and bruised mâche deteriorates quickly. Do not wash until just before serving. A salad spinner run briefly removes surface moisture; spin too aggressively and you’ll break the delicate leaves.

Mâche does not freeze or preserve well. It is strictly a fresh-use green. The entire value is in eating it just-harvested from the garden, which is the point.

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Related crops: Arugula, Spinach

Related reading: Spring Garden Planning - how to sequence cool-season greens for continuous harvest from fall through spring