When to Plant Tomatoes in New York
Set your conditions — the recommendation updates instantly.
GardenSays
Start tomato seeds indoors Mar 25 – Apr 8; transplant once frost danger is past and soil has warmed to ~60°F — typically May 20 – Jun 10 here.
- Start seeds indoors
- Mar 25 – Apr 8
- Transplant outside
- May 20 – Jun 10
- Last frost (typ.)
- Apr 15
In New York, NY, the typical last frost lands around Apr 15. Working back 6-8 weeks from transplant time gives you a seed-starting window of Mar 25 – Apr 8 indoors. Tomatoes are frost-tender, so wait for two conditions — frost danger past AND soil around 60°F — which here typically means May 20-Jun 10.
- This year's transplant window (May 20 – Jun 10) has passed — dates shown are for planning next season.
Do this this week
- 1.Passed for this season — plan next spring: start seeds indoors ~Mar 25 – Apr 8, transplant ~May 20 – Jun 10
Typical estimate · 3 verified sources · Checked 2026-07-15 · How we decide
Why
New York, NY is a slow-warming spring climate: frost safety arrives around Apr 22, but soil and night temperatures lag several weeks behind — planting at the frost-safe date usually means stalled, purple-tinged plants. The May 20 – Jun 10 window is our estimate for when warmth actually arrives; a soil thermometer reading ~60°F is the real green light.
That leaves roughly 144 days of growing season before the typical first fall frost (Nov 1) — enough for most varieties. In a short-season area, favor early-maturing varieties (check the days-to-maturity on the tag).
- Frost kills tender seedlings outright, and cold soil stunts them even without frost — both dates matter.
- The 50% frost date is a planning midpoint: a late frost is still possible, so keep covers handy for the first two weeks.
When this doesn't apply
- Season extenders (row covers, walls of water, cold frames) let you plant 2-3 weeks earlier than these windows.
- Frost dates are area averages — low spots and valley floors run colder than the local average.
How this was calculated
- 1. Last spring frostApr 15Source guidance
New York, NY: typical (50% probability) last 32°F frost
- 2. Seed starting windowMar 25 – Apr 8Calculated result
Tomato: start indoors 6-8 weeks before your typical transplant date
- 3. Frost-safe fromApr 22Calculated result
New York, NY: frost danger typically passes after the last frost — but frost-safe is not warm enough here
- 4. Typical transplant windowMay 20 – Jun 10GardenSays estimate
New York, NY has a long, slow-warming spring: soil (~60°F) and mild nights arrive ~4-6 weeks after frost safety — our estimate; a soil thermometer beats the calendar
- 5. First fall frostNov 1Source guidance
New York, NY: typical first 32°F frost in fall — the season's endpoint
Data sources
- University of Minnesota Extension — Growing tomatoes in home gardens — Start tomato seeds indoors about 6 weeks before the last frost; transplant after all danger of frost, once soil has warmed. (checked 2026-07-15)
- NOAA NCEI — 1991-2020 U.S. Climate Normals (freeze date probabilities) (checked 2026-07-15)
- National Gardening Association — frost date lookup (checked 2026-07-15)
What changes this answer
Starting from
Every change updates the answer, the math, the weekly steps and the share link instantly.
People also ask
What is the last frost date in New York?
Start tomato seeds indoors Mar 25 – Apr 8; transplant once frost danger is past and soil has warmed to ~60°F — typically May 20 – Jun 10 here. Calculate yours →
When should I start tomato seeds indoors?
Start tomato seeds indoors Mar 25 – Apr 8; transplant once frost danger is past and soil has warmed to ~60°F — typically May 20 – Jun 10 here. Calculate yours →
Your next decisions
More planting dates tools: see all →