Tom Thumb Lettuce Tom Thumb Butterhead Lettuce Seeds. 55-60 Days. Heirloom, Non-GMO. Lactuca sativa. Highly productive, dwarfed bibs lettuce that is quick to mature no bigger than a baseball or tennis ball, the Tom Thumb lettuce is an early 19th century American heirloom still popularly grown for quick, steady harvests. Tom Thumb butterhead honors renowned P.T. Barnum performer General Tom Thumb, a household name throughout America during the 1800’s. Butterhead is a hardy cool weather crop performing just as vigorously when sown direct as when transplanted. For earliest starts, begin indoors 4-6 weeks before final frost. Plant 2-3 seeds ¼” deep and 2” apart in organically rich, well-drained soil in full sun to partial shade. Seeds will germinate in 7-10 days, thinning back to 1 plant every 4” as true leaves establish. Harvest large outer leaves while allowing smaller leaves to continue to mature. About 25,000 Seeds / Ounce. Why Mountain Valley Seed Company? Find out why over half a million customers have chosen Mountain Valley Seed Company for their seed and gardening needs. 100% of our seeds are Non-GMO, and we have a huge selection of organic seed options to choose from. In addition, we offer an amazing selection of Microgreens Kits, Wheatgrass Kits, Indoor Herb Garden Kits & more. Growing together since 1974, Mountain Valley Seed Co. has been providing high-quality seeds at incredible prices to local and nation-wide growers alike.