Lettuce Salad Bowl Seed Tapes (Aimers Seed Tape) Heirloom Vegetable. Our favourite All America Selection Winner from the past produces medium green leaves that are long and deeply lobed with a tender texture and sweet taste. Appealing colour and vitamin rich! Salad Bowl is one of the best for growing in hot summers because it is slow to bolt to seed. A delightfully quick 45 days to harvest from germination. Introduced in 1952.