60-70 Days to Maturity. Daucus carota var. sativus. Thumbelina Carrot Vegetable Seeds. Non-GMO, annual, open-pollinated, heirloom, 1992 AAS winning carrot. This golf ball-sized round carrot is very sweet and thin-skinned. Ideal for snacking, stews, or roasting whole. Well adapted to container culture where regular carrots suffer. Space two inches apart. Stays sweet well after harvest.