A repeat crop can fit only once
You want a Spring Tomato harvest and can sow twelve plants on Spring 18 or 19. From Spring 18, the ten-day first wait reaches Spring 28, giving one date. Tomato has a four-day regrowth interval, but no room for it remains inside Spring. This late start serves a one-date goal, not a repeat schedule.
The resulting single date does not turn Tomato into a single-harvest crop. It tells you that this starting point leaves room for only one round in this window. The crop record describes the plant’s pattern; the date list describes how much of that pattern fits after your chosen start. Keep those two ideas separate when comparing a late planting with an early one.
An empty result has a precise meaning
Now move the start to Spring 19. Nineteen plus ten is 29, so the first harvest falls beyond the day-28 boundary. There are no calculated Spring harvests. This is the exact difference a single day makes at the edge: Spring 18 fits a first date on 28, while Spring 19 does not.
Tomato is listed for Spring and Summer in the crop reference. That broader availability is useful context, but it does not cause this calculator to continue into Summer. An outside-window result does not say the plant dies, and it does not establish a Summer harvest date. Carrying a planted crop across seasons needs rules and state that this one-season model does not simulate.
Use the answer that was actually calculated
If your question is “Can this planting produce a calculated harvest before Spring ends?”, Spring 18 answers yes and Spring 19 answers no. If your real question is what the bed will do next season, this date list is incomplete for that purpose. Do not rename a hypothetical day 29 as Summer 1 and present it as a forecast.
If repeat dates are essential, choose an earlier start and inspect the full-season Tomato case. If only an in-season harvest matters, compare a different late crop’s season and first wait. Every result assumes daily watering, no growth modifiers and harvest on maturity. A shared regrowth label cannot supply time after Spring 28 or justify a cross-season forecast.
The example, calculated
Tomato · Spring 18
12 plants. First harvest: 18 + 10 = day 28. Add 4 days for each repeat.
Spring 28