Garden Tempo

Tomato planting guide

When to plant tomatoes

Plant tomatoes after frost danger has passed and the soil has warmed. That rule is national in shape, but not a nationwide calendar date. Use your local frost-free date and the condition of the bed, then open a state guide if Garden Tempo supports your location.

Tomatoes need warm conditionsA warm afternoon alone is not the same as a warm, frost-safe planting window.

Start from frost-free timing, then check soil

Minnesota
After frost danger and warm soilUMN frames transplanting around both conditions, not a calendar date alone.
Illinois
Soon after the local frost-free date, with warm soilIllinois Extension warns that cold nights can stall a plant after an early transplant.
Oregon example
Dates change within one stateOSU gives different timing for western and central Oregon.

Do not convert this into one U.S. planting day

Frost risk, soil warmth and growing-season length vary by location. A local guide can tell you which dates and protections belong to your garden.

Choose a local route

Garden Tempo has separate tomato guides for these locations. Each has its own timing model and does not inherit a national date from this page.

Georgia tomato guideSpring and late-summer context for Georgia. Texas tomato guideTexas regional planning and conditions. Ohio tomato guideOhio timing and transplant decisions.

Prepare transplants for outdoor conditions

UMN and OSU both advise hardening off indoor or greenhouse plants before planting. Put stakes, cages or another support in place at planting time, rather than disturbing roots later.

Make a simple planting plan

Write down your local frost-free date, a target transplant week and the variety on the label. If a late cold night is likely, wait or use protection supported by your local Extension advice. The seed packet's maturity range belongs in the plan too, especially where the warm season is short.

Quick questions

Can I plant after one warm day?
Not on that signal aloneCheck frost risk and soil warmth for the bed, not only afternoon air temperature.
Can I use a state date elsewhere?
NoUse the local Extension guidance for the state and growing conditions you have.