The example, calculated
Tomato · Spring 1
12 plants. First harvest: 1 + 10 = day 11. Add 4 days for each repeat.
Spring 11 · Spring 15 · Spring 19 · Spring 23 · Spring 27
First harvest = planting day + growth days
The planting day is your starting point. Add the crop’s growth days to find the first harvest date. Tomato takes ten days to reach its first harvest under the ordinary conditions used here. Planting on Spring 1 therefore gives a first harvest on Spring 11. Counting Spring 1 itself as the first completed growth day would move the answer a day early.
Enter the planting day you actually intend to use. A useful schedule can begin halfway through a season; it does not need to begin on day 1. The later start simply leaves fewer dates before the season ends. If the first harvest falls after day 28, the planner will show that it is outside the selected window.
Repeat dates = previous harvest + regrowth days
After the first Tomato harvest, add its four-day regrowth interval to find each later date. The Spring 1 planting gives Spring 11, 15, 19, 23 and 27. The next step would be day 31, which is beyond this season’s window and is not listed. These five dates are five harvest rounds for the same bed.
A quantity of twelve means twelve plants follow that schedule. It is not a promise of twelve produce items per round, and the schedule does not calculate item yield, quality or contribution value. Changing twelve to a different plant count leaves the five dates unchanged. This lets you decide the calendar first and the bed size second.
Schedule assumptions and comparison limits
The repeats assume you harvest when each round is ready. Treat the dates as return visits: water daily while the crop grows and leave room in your plans for each harvest. If you harvest late, the later dates in this ideal schedule should not be treated as guaranteed appointments for your actual field.
Compare a second planting day by changing only that input and reading the new sequence. Look for the first date that matters to you and the final date that still fits. This is a timing comparison, not a claim that the crop with more rounds is more profitable or a better choice for every goal.