Online Tool Store
Frost Date Planner
Enter your last spring frost date to generate a seed-starting and transplanting schedule for common crops. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Planting schedule
Tomatoes
Start indoors: Mar 1 - Mar 15 · Transplant outdoors: Apr 26 - May 3
Lettuce
Start indoors: Feb 15 - Mar 1 · Transplant outdoors: Apr 5 - Apr 12
Peppers
Start indoors: Feb 22 - Mar 8 · Transplant outdoors: May 3 - May 10
Example shown — enter your own last frost date for a matching schedule.
How it works
- Enter your area's expected last spring frost date.
- Each crop's indoor-start and outdoor-transplant windows are calculated.
- Use the schedule to time your seed starting and planting.
Planning offsets each crop's typical weeks-before/after-frost guideline from your entered date, producing a personalized planting calendar — the same "weeks before last frost" timing printed on most seed packets, applied automatically.
FAQ
Is my location uploaded anywhere?
No. Planning happens entirely in your browser — nothing is sent to a server.
How does it know when to start each crop?
Each crop has a typical number of weeks before or after the last frost date for starting seeds indoors and transplanting outdoors, based on common gardening guidelines.
How accurate is the frost date I enter?
The tool uses whatever last-frost date you provide — check your local extension office or a frost date database for the most accurate estimate for your area.
What if I want to add my own crops?
The built-in list covers common vegetables. For crops not listed, use their seed packet's "weeks before last frost" guidance alongside your entered date.
How we compare
| Feature | Online Tool Store | Reading each seed packet | Garden planning apps |
|---|---|---|---|
| All crops calculated at once | ✓ | One packet at a time | ✓ |
| Free, no account | ✓ | ✓ | Often subscription-based |
Reading every seed packet one at a time is tedious for a full garden. Frost Date Planner schedules multiple crops at once from a single date.