Examples
Examples
Try the starting example
- First target harvest date
- 2026-06-01
- Harvest spacing (days)
- 7
- Number of batches
- 3
- Days from transplant to harvest
- 30
- Days from sowing to transplant
- 14
- Batch sowing dates
- 2026-04-18, 2026-04-25, 2026-05-02
- Batch transplant dates
- 2026-05-02, 2026-05-09, 2026-05-16
- Target harvest dates
- 2026-06-01, 2026-06-08, 2026-06-15
- Last target harvest date
- 2026-06-15
Try another scenario
- First target harvest date
- 2026-03-01
- Harvest spacing (days)
- 10
- Number of batches
- 2
- Days from transplant to harvest
- 10
- Days from sowing to transplant
- 5
- Batch sowing dates
- 2026-02-14, 2026-02-24
- Batch transplant dates
- 2026-02-19, 2026-03-01
- Target harvest dates
- 2026-03-01, 2026-03-11
- Last target harvest date
- 2026-03-11
Calculation method
Calculation method
Batch sowing dates
Harvest date − supplied transplant-to-harvest days − supplied nursery days.
Batch transplant dates
Harvest date − supplied transplant-to-harvest days.
Target harvest dates
First harvest date + batch index × harvest spacing.
Last target harvest date
Final generated target harvest date.
Symbols and units
- a
- First target harvest date
- b
- Harvest spacing (days)
- c
- Number of batches
- d
- Days from transplant to harvest
- e
- Days from sowing to transplant
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Reverse calendar arithmetic using your supplied growing durations. It does not forecast maturity, weather, germination or yield, and it does not adjust for local seasons.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.