How to Plant and Grow Mesclun in Your Garden

Mesclun has become a popular salad green mix for grocery shoppers and home gardeners alike. The French word simply means mixture, and the mix delivers two things gardeners want: a range of flavors, textures, and colors from a single planting, and fast results, because the greens are harvested at the baby leaf stage. Typically you can start harvesting mesclun one month after sowing the seeds. The mix is a cool-season crop, which means it fills the garden in spring and fall, the two windows when heat-loving vegetables are still getting established or already fading.

What Is Mesclun?

Mesclun, also sold as spring mix, is a blend of young salad greens. It contains at least four different types of tender, leafy greens in varying amounts. A classic Provencal mix includes arugula, chervil, lettuces, and endive, but seed companies now sell blends built around mizuna, mustard, kale, spinach, radicchio, and Swiss chard. The point of the blend is variety: peppery leaves next to mild ones, crisp leaves next to tender ones, and a mix of greens, reds, and bronze tones on the plate.

Typical Greens in a Mesclun Mix

Seed companies blend their mixes differently, but these greens show up again and again:

• Arugula, the peppery green that gives the mix its bite.
• Loose-leaf lettuce, mild and soft, which makes up the bulk of most blends.
• Mizuna and tatsoi, Asian greens with feathery leaves and a gentle mustard note.
• Mustard greens, spicy and fast growing, often added for color.
• Spinach, sweet and earthy, which holds up well after cutting.
• Endive and radicchio, which contribute the bitter edge that balances sweet leaves.
• Chervil and parsley, delicate herbs that add aroma to the bowl.

Most commercial spring mixes contain four to eight types of greens, and the blend changes with the season because some greens bolt faster in warm weather. Buying a mix saves you from buying seven separate packets and sowing them one by one. Blending your own lets you control the ratio, such as a mild-heavy mix for kids or a spicy mix heavy on arugula and mustard.

When and Where to Plant Mesclun

Mesclun is a cool-season crop that grows best when air temperatures sit between 45 and 65 degrees Fahrenheit. Seeds germinate in soil as cool as 40 degrees, which makes mesclun one of the first things you can sow in spring. Plan the first sowing two to four weeks before the last expected frost, and plan a fall sowing six to eight weeks before the first fall frost so the greens reach harvest size while days are still mild.

Sowing Windows for a Long Season

Succession planting keeps the harvest going. Sow a new patch every two to three weeks through spring, pause during the heat of summer, then resume in late summer for fall crops. A garden with three staggered beds can supply salad greens for six to eight weeks straight from a single season of sowing. In mild-winter regions, a protected fall planting can carry through winter and start producing again in early spring.

Sun and Soil Requirements

Mesclun handles partial shade better than most vegetables. In spring and fall, give it full sun. In late spring and summer heat, afternoon shade or shade cloth keeps the leaves tender and delays bolting. The soil should be rich, well drained, and slightly acidic to neutral, in the pH 6.0 to 7.0 range. Work in 1 to 2 inches of compost before sowing, and the mix will not need heavy feeding later. Raised beds are a good fit because they warm up faster in early spring and drain better after rain.

How to Plant Mesclun Seeds

Sow mesclun directly in the garden. The greens grow so fast that indoor starts rarely pay off, and the seedlings transplant poorly compared with other vegetables. Scatter the seed over prepared soil, cover it lightly, and keep the surface moist until germination, which takes 7 to 14 days depending on soil temperature.

Step-by-Step Sowing

Follow these steps for an even stand of greens:

1. Rake the bed smooth and remove stones, clods, and old plant debris.
2. Broadcast the seed evenly, aiming for roughly one seed per square inch of bed.
3. Cover the seed with 1/8 to 1/4 inch of fine soil or compost.
4. Water gently with a fine spray so the seed does not wash into clumps.
5. Keep the top inch of soil consistently moist until seedlings appear.
6. Thin or transplant crowded seedlings so the leaves have room to develop.

Sowing in short rows 6 to 10 inches apart works too, and rows make weeding easier. Whichever method you choose, mark the row ends with a label, because mesclun seedlings look like weeds to anyone who does not know the bed. A single packet of mesclun seed covers 50 to 100 feet of row, so one packet lasts most gardeners several seasons.

Growing Mesclun in Pots

Containers work well for mesclun. Use a pot at least 6 to 8 inches deep with drainage holes, fill it with potting mix, and sow the same way you would in a bed. A window box or half-barrel on a patio keeps the harvest steps from the kitchen. Containers dry out faster, so check them daily in warm weather. Because mesclun is harvested young, a 12-inch pot can supply enough greens for several salads before it needs resowing.

Caring for Mesclun

The care routine is short: steady moisture, light feeding, and quick action when pests show up. Mesclun does not need staking, pruning, or training, which makes it one of the lowest-effort crops in the garden.

Watering and Feeding

Keep the soil evenly moist. Mesclun is shallow rooted and will bolt or turn bitter if it dries out. Water at the base in the morning so the leaves dry before evening, which cuts down on fungal disease. A light dose of balanced fertilizer at sowing and again after the first cutting keeps regrowth vigorous. Too much nitrogen produces soft, watery leaves that bruise in the salad spinner, so follow the rates on the package rather than doubling up.

Managing Heat and Bolting

When temperatures climb past 75 degrees, lettuce-type greens start to bolt, sending up a flower stalk that turns the leaves bitter. Shade cloth, afternoon shade, and extra mulch slow this down. Choose bolt-resistant varieties for late spring sowings, and accept that summer heat ends the season for most mixes. A summer planting of heat-tolerant greens such as New Zealand spinach or purslane can cover the gap, but true mesclun returns when fall cools down.

Common Pests and Diseases

• Aphids cluster on new growth; knock them off with a strong spray or insecticidal soap.
• Slugs and snails chew leaves at night; trap them under boards or use barriers around the bed.
• Flea beetles riddle leaves with small holes; floating row covers keep them out.
• Downy mildew shows as yellow patches on leaves; improve airflow and avoid overhead watering.
• Cutworms fell seedlings at the base; press a collar into the soil around each stem at planting.

Harvesting and Storing Mesclun

Mesclun is ready when the leaves reach 3 to 4 inches tall, usually about 30 days after sowing. The cut-and-come-again method gives you multiple harvests from one planting, so you do not need to replant every time you want a salad.

Cut-and-Come-Again Harvesting

Use scissors to snip the outer leaves or cut the whole patch 1 inch above the soil line. The plants resprout from the base, and you can harvest again in two to three weeks. Most plantings give two to four cuttings before the greens lose vigor or bolt. Harvest in the morning, when the leaves are crisp and full of moisture. Wash the leaves, spin them dry, and store them in a sealed bag with a paper towel; they keep for about a week in the crisper drawer.

Extending the Season

Cold frames, cloches, and low tunnels push mesclun into late fall and early spring. A row cover adds several degrees of frost protection and keeps pests off winter sowings. In USDA zones 7 and warmer, a fall-sown patch under cover often produces through winter, giving you fresh salad when the rest of the garden is dormant. The same cold frame that hardens off spring seedlings can hold a winter mesclun bed, which is a good use of the space between growing seasons.