Lactuca sativa This HEIRLOOM is the oldest American lettuce still in cultivation Forms the smallest lettuce of all Grows well in containers and window boxes Open-pollinated seeds Matures in 50-70 days Dating back to 1830, this heirloom is the oldest American lettuce still in cultivation, which speaks to its charms. Plant Tom Thumb lettuce seeds for the smallest lettuce of all – a tennis ball-sized Bibb that will fit in the palm of your hand. The small heads have creamy yellow centers with medium green, slightly crumpled wrapper leaves. This variety works well in containers – even window boxes! It\’s a good candidate for indoor growing under lights and does not need a large container to grow well. Try growing some Tom Thumb lettuce seeds in a cold frame or unheated greenhouse in the winter. 0.5g (Approx.463 seeds)