5 Things to Know About Starting Tomato Seeds in Zone 6

Aim for March 15 That gives you 6–8 weeks before the last frost date, typically early May in Zone 6. Starting earlier leads to leggy, root-bound plants; starting later delays fruit until July.

Use seed-starting mix and warmth Tomatoes need a seed-starting mix, a sunny windowsill or grow light, and soil kept at 70°F until they sprout. They aren’t fussy seedlings but hate cold feet.

Don’t rush them outside after the last frost Soil temperature matters more than the calendar. Wait until the ground is consistently above 60°F, usually two weeks after your frost date, or you’ll stunt the plants.

Keep it simple Tomatoes are straightforward to start. Don’t overthink it—just provide warmth, light, and patience.

Mark your calendar Put your seed-starting date on the calendar and stick to it. That discipline pays off with August tomatoes.