|'Big Boston', also known as 'Trocadero', 'Tate's Forcing White', and 'Giant White Forcing' is a white-seeded heirloom variety introduced in America in the late 1800's. The lettuce produces medium-large heads, globular in shape. The leaves are light green with brown fringes. This lettuce has a good flavor, and tender texture. The inner part of the head is golden yellow. 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.