Q.Vegetable Gardening
When should I start tomato seeds indoors?
A.
Start tomato seeds indoors 6-8 weeks before your last expected frost date. For most US zones that's mid-February to early April. Use a heat mat (70-80°F) for germination, then move to bright light. Transplant outside after the conservative last-frost bound and once soil hits 60°F.
Frost-date pages give your specific last-frost timing. Tomato variety review pages help with cultivar selection.