Schedule repeated plantings to avoid harvest gaps. Calibrate bed spacing and seed rates quickly. Keep produce flowing with confidence every single week.
Enter spacing and timing to generate a planting calendar.
Use these sample values to test output quickly.
| Crop | First date | Maturity | Interval | Successions | Bed (ft × in) | Spacing (row × plant) | Germination | Stand |
|---|---|---|---|---|---|---|---|---|
| Lettuce | 2026-04-11 | 55 days | 14 days | 6 | 12 × 36 | 12 × 10 | 85% | 90% |
Succession planting spreads harvest volume across time instead of creating a single peak. For quick crops like leafy greens, a 7–14 day interval often keeps pickable heads available weekly. This calculator converts that interval into a dated calendar, so harvest gaps become visible before you sow.
Days to maturity estimates when the first usable harvest begins, while the harvest window estimates how long that planting stays productive. A 55 day crop with a 14 day window can supply about two weeks of picking. If your household consumes produce every week, overlapping windows by setting a shorter interval helps continuity.
Spacing controls how many planting sites fit in a bed. The model uses bed width and row spacing to estimate row count, then bed length and plant spacing to estimate plants per row. For example, a 36 inch bed with 12 inch rows produces three rows; a 12 ft bed at 10 inch spacing fits about fourteen sites per row.
Germination and stand percentages protect your plan from common losses. If germination is 85% and stand is 90%, only about 77% of sites become harvestable plants. The calculator scales seed needs using seeds per site so you can buy accurate quantities, especially when running multiple successions.
In warm weather, shorten intervals for fast growth and bolting risk. In cooler periods, extend intervals because growth slows. Keep notes on variety, weather, and pest pressure; then update maturity and stand values each season. Over time, your dates become a dependable production rhythm.
Many gardeners start with 7–14 days. Use shorter intervals in warm weather for faster growth. If harvests overlap too much, increase the interval until weekly demand matches output.
Use the seed packet value, then adjust based on your climate. Cool temperatures slow growth and add days. Track actual harvest dates for a season and update the maturity input for future plans.
The window estimates how long one planting stays productive. Overlapping harvest windows helps prevent gaps. Short-window crops need tighter intervals, while longer-window crops can be planted less frequently.
Yes. For transplants, use the date you set plants into the bed as the planting date. If you want to include nursery time, add those days to maturity or note them separately.
Start with 80–90% germination for fresh seed and reduce it for older seed. Stand reflects field losses from pests, heat, or thinning; 85–95% is common in well-managed beds.
Reduce the bed length or increase spacing inputs to represent partial use. You can also lower successions or use notes to describe how you split beds among crops.
It improves reliability, but weather and pests still matter. Use conservative stand values, keep notes, and consider a buffer succession. Recalculate after major temperature shifts or disease events.
Tip: shorten the interval for faster crops and warm weather.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.