|'King of the Market', also known as 'Hanson', 'Ewing's Excelsior', and 'Gardener's Favorite', is an heirloom variety. It is white-seeded, with light green curly leaves that have fringed edges. This is a heading lettuce, extremely crisp and good for sandwiches. Slugs love it, but it withstands the heat well. Start from seed 4 to 6 weeks before average last frost date. Sow seeds 1/4 inch deep in wide rows and thin to 8 to 12 inches apart. Thinned seedlings can be replanted. Keep soil moist but not soggy. Protect from rabbits and slugs. Extend the harvest season by planting successive crops. Summer heat causes lettuce to bolt. Pick outer leaves as they grow or harvest all at once. Harvesting when weather or day temperature is cooler will result in crisper leaves. Do not harvest lettuces until you are ready to use it.