To have ripe tomatoes by a certain date, count back the variety’s days to maturity to find the transplant date, and another 6 weeks for seed starting. A 75-day tomato for July 31 goes in the ground by May 17 and starts from seed by April 5. Enter your target date, variety speed, and last frost below to check it works.
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What Your Result Means: the transplant date is the latest date to set plants out to have first ripe fruit by your target. If you enter a frost date, the planner checks that the transplant date is at least two weeks after it, the same safety margin our Planting Date Calculator uses, and tells you the earliest harvest you can realistically expect.
When Should You Plant Tomatoes to Harvest by a Certain Date?
Work backward from the date you want ripe fruit. Days to maturity on the packet usually counts from transplanting, so subtract it from your target date, then subtract seed-starting time if you grow your own.
- Pick your target date, such as a holiday, a canning weekend, or a family event.
- Choose the variety’s days to maturity from the packet or tag.
- Choose how you will start the plants.
- Add your last frost date to check the plan is safe.
Tomato Days to Maturity Chart
| Variety Type | Days From Transplant | Days if Direct-Seeded |
|---|---|---|
| Early cherry | About 50 | About 75 |
| Early full-size | About 60 | About 85 |
| Mid-season | About 75 | About 100 |
| Full-season and many heirlooms | About 85 | About 110 |
How Does the Harvest Date Planner Work?
Start seeds by = transplant date – 42 days (6 weeks)
Direct sow by = target date – (days to maturity + 25)
Safe transplant date = last frost + 14 days
If transplant date is earlier -> earliest harvest = safe date + days to maturity
Worked Example
Say you want ripe tomatoes by July 31 for a canning weekend, you grow a 75-day variety from seed, and your last frost is May 1. Count back 75 days to a transplant date of May 17, and 6 weeks more to start seeds by April 5. May 17 is 16 days after your frost date, so the plan is safe.
Factors That Change the Result
- Weather: cool springs slow plants; heat above about 90°F stalls fruit set and ripening.
- Soil temperature: plants set into soil below 60°F sit still for weeks.
- Transplant size: larger, healthy transplants bear sooner than small ones.
- Seed companies: not all count days to maturity the same way.
- Variety: determinate types give most fruit at once; indeterminate types keep going.
Accuracy and Limitations
This is a planning estimate.
What It Does Well: works back from your target date using standard days-to-maturity rules and checks frost safety.
What It Does Not Do: predict weather. Allow a week or two either side, and plant a little early where frost allows. This is general guidance, not professional advice.
Methodology
Method: subtract days to maturity from the target date to get the transplant date, and 42 days more for indoor seed starting. Days to maturity: about 50 days for early cherry, 60 for early full-size, 75 for mid-season, and 85 for full-season cultivars from transplants, with direct-seeded plantings about 25 days longer (Oregon State University Extension). Counting: for transplants, days to maturity start at transplanting (University of Maine Extension). Frost safety: transplant about 2 weeks after the last frost, matching our Planting Date Calculator. Seed starting: 6 weeks, within the 6 to 8 weeks our Planting Date Calculator uses.
Sources: Oregon State University Extension – Grow Your Own Tomatoes and Tomatillos, University of Maine Extension – When Does Days to Maturity Start?, Iowa State University Extension – Growing Tomatoes. Last reviewed: September 28, 2026 · Reviewed by Aiza Anwar.
Frequently Asked Questions
When should I plant tomatoes to harvest by a certain date?
Count back the variety’s days to maturity from the date you want ripe fruit to get the transplant date, then another 6 weeks if you start from seed. Check that the transplant date is after your frost risk has passed.
Are tomato days to maturity counted from seed or transplant?
For tomatoes started indoors, from transplanting into the garden. University of Maine Extension notes that the count starts when transplants go out and begin actively growing, though seed companies are not all consistent.
How many days does it take tomatoes to ripen?
From transplanting, commonly about 50 days for early cherry types, 60 for early full-size types, 75 for mid-season, and 85 for full-season varieties, according to Oregon State University Extension.
How much longer do direct-seeded tomatoes take?
About 25 days longer than transplants, per Oregon State University Extension.
Can I get ripe tomatoes by the Fourth of July?
In many areas, only with an early or cherry variety planted out as soon as frost risk has passed. Enter your frost date and target date to check.
What if my planting date is before the last frost?
The planner flags it. Either choose a faster variety or accept a later first harvest; tomatoes planted into cold conditions stall rather than ripen sooner.
Is the days-to-maturity date exact?
No. It is an estimate for good conditions. Cool weather, cold soil, and heat waves all shift it, so allow a week or two either way.
How long after first harvest do tomatoes keep producing?
Determinate varieties give most of their crop over a short period; indeterminate varieties keep producing until frost.
Related Tomato Tools
See When to Plant Tomatoes
This planner gives estimates from typical days to maturity, not a guarantee. Weather varies year to year. Spotted an error? Tell us here.