Succession planting planner
Pick a crop and the window you want to keep harvesting through. You'll get every sowing date at the right interval.
Cucumber is usually re-sown every 21 days. It matures in 50–70 days, so a spring sowing is ready roughly that long after you plant it.
How this is calculated
Sowing dates step forward from your first date by the crop’s re-sow interval (about 10 days for radish, 2 weeks for beans and lettuce, 3 weeks for cucumbers) until the last useful date you set. For a spring window, stop before summer heat; for a fall window, the last sowing should still have enough days to mature before your first frost.
Common questions
Which crops are actually worth succession sowing?
Fast-maturing crops you'll eat continuously - radish, lettuce, bush beans, cilantro, salad turnips - benefit most, since one sowing matures and is gone within a couple of weeks. Slow, one-and-done crops like winter squash or main-crop potatoes don't need it.
What happens if I sow too close to my first fall frost?
The planting won't have enough days to mature before cold stops growth - that's why the calculator stops suggesting sowings once the remaining window is shorter than the crop's days-to-maturity.
Can I use this for a fall garden instead of spring?
Yes - set your start date after summer heat breaks and your end date to your first fall frost; the same re-sow interval logic applies in reverse.