If you choose to grow tomatoes from seed, here are some considerations: the seeds should be organic, disease resistant, heirloom, consider plant size and harvest time. You’ll need tomato seeds, containers, potting mix, labels, water and light. Tomato seed germinates fairly quickly, within 5-10 days. The plants also develop fast, so seeds can be started 6-8 weeks before you intend to transplant outdoors. So if you plan to transplant outdoors in early May, start your seedlings indoors in mid- to late March. Keep in mind that the warmer your seedlings are kept and the more light they are given, the faster they will grow. Continue reading what to do at gardening.about.com.