Sow
0.49 inches (1.25 cm) deep with a guideline distance of
5.85 inches (15.0 cm). Soil temperature should be kept higher than
5°C / 41°F to ensure good germination.
By our calculations, you should look at sowing Mesclun about 53 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Mesclun is a tender plant.