Sweet Garden Organics Gourmet Mix Lettuce - Certified Organic Heirloom Seeds 2 pack (600 count/pk) Certified Organic/Heirloom Seeds 600 seeds - open-pollinated so you can harvest seed and save for next year's planting! Unique and wonderfully-flavored lettuce mix - a must try! Very easy to grow and can harvest several times 28 days to harvest as baby lettuce, 50 days as larger leaves