Seed Starting Date Calculator
Start seeds indoors at exactly the right time so transplants are ready when the weather turns. Enter your average last spring frost date, the number of weeks before that frost your seed packet says to sow indoors, and any extra days to harden off outside before planting. The calculator counts backward to give you the date to sow the seeds and the target date to move them into the garden. Tomatoes and peppers usually want six to eight weeks of a head start, while fast growers like squash want only two to three. Starting too early leaves you with leggy, rootbound seedlings, so this timing keeps them stocky and strong. All dates are worked out instantly in your browser with no signup.
How to use Seed Starting Date Calculator
- Enter your local last spring frost date.
- Enter how many weeks before frost the crop should start indoors.
- Read the exact indoor sow date.
- Read the matching outdoor transplant date.
Frequently asked questions
How does it find the indoor sow date?
It counts back the number of weeks you enter from your last spring frost date to give the date to start seeds indoors.
How is the transplant date set?
The transplant date is your last frost date, since most seedlings go outside once frost risk passes, so the sow date sits that many weeks before it.
Why do different crops start at different times?
Slow growers like peppers need more weeks indoors than fast ones like squash, so entering each crop's recommended weeks gives the right start date for that plant.
What is Seed Starting Date Calculator?
Start seeds indoors at exactly the right time so transplants are ready when the weather turns. Enter your average last spring frost date, the number of weeks before that frost your seed packet says to sow indoors, and any extra days to harden off outside before planting.
Is Seed Starting Date Calculator free to use?
Yes. Seed Starting Date Calculator is completely free, with no sign-up and no usage limits.
Does Seed Starting Date Calculator work in a web browser?
Yes. Seed Starting Date Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Seed Starting Date Calculator?
Yes. Seed Starting Date Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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