Succession Planting Planner Calculator

How to use the succession planting planner

Enter plant name, days to maturity from sowing, how long the harvest window lasts in days, and how often you want to replant (replant interval). Pick your first or next planting date on the calendar.

Each click adds a row showing planting date, first harvest, end of harvest window, and the suggested next sowing date.

Succession planting formulas

First harvest = Planting date + Days to maturity. End harvest = First harvest + Harvest window (days). Next planting = Current planting date + Replant interval (days).

Staggering sowings every 2–3 weeks keeps lettuce, beans, and carrots producing instead of maturing all at once.

• First harvest = plant date + days to maturity
• End harvest = first harvest + harvest window
• Next sowing = plant date + replant interval
• Overlap harvest windows for continuous supply

Worked example

Lettuce sown March 1: 45 days to maturity, 21-day harvest window, replant every 14 days.

First harvest ≈ April 15. Harvest window ends May 6. Next sowing = March 15 — the second crop begins harvesting around April 29 while the first crop is still productive.

Best crops for succession planting

Salad greens, radishes, bush beans, carrots, and cilantro excel with succession schedules. Long-season crops like tomatoes and winter squash are usually planted once.

Match replant interval to crop speed — radishes may replant every 10 days; head lettuce every 21 days.

Planning tips

Reserve bed space for the next sowing before the previous crop finishes. Use square foot gardening or plant spacing calculators to size each succession block.

• Log actual harvest dates to refine intervals next year.
• Pause succession sowings during peak summer heat for cool-season crops.
• Pair with seed starting date for transplanted successions.
• Use crop yield estimator to gauge total production across plantings.