Seeds and Propagation
Cold Stratification End Calculator
Cold Stratification End is intended to add a required cold period to a stratification start day. Replace its starting values with the scenario being evaluated.
Enter values for stratification end day
Cold Stratification End needs stratification start day and required cold days from one case.
Measurements for Cold Stratification End
Prepare Stratification start day and Required cold days for Cold Stratification End. Keep unrelated records separate.
Stratification start day. Default in Cold Stratification End: 20 day.
Required cold days. The Cold Stratification End target is 60 days in the starting case.
How input changes affect stratification end day
Run another case with Stratification start day changed and the other inputs held constant. The difference in stratification end day then shows the effect of that assumption within this formula. A separate estimate of cells to sow comes from Plug Tray Requirement Calculator.
How Cold Stratification End performs the calculation
Cold Stratification End combines Stratification start day and Required cold days to produce stratification end day. Daily mist time? See Propagation Misting Total Calculator.
Stratification start day at 20 day, required cold days at 60 days produces 80 day in the demonstration case.
Reading stratification end day
Use Stratification end day to add a required cold period to a stratification start day. Keep the Cold Stratification End inputs beside the output.
Cold Stratification End assumption to check
Some species require alternating warm and cold phases.
Cold Stratification End record to keep
Keep a copy of the Cold Stratification End formula inputs: Stratification start day and Required cold days. Seeds per gram: Seeds per Gram Calculator handles this follow-up.
Store Stratification end day under a scenario name that identifies the bed, crop, batch, product, or period.
A later field observation can be added alongside stratification end day without erasing the original calculation.
What changes when stratification start day changes
Raise Stratification start day from 20 day to 22 day; keep required cold days fixed. Stratification end day moves from 80 day to 82 day.
Cold Stratification End isolates stratification start day in this test; biological response remains outside the arithmetic.
If stratification start day has a plausible range, save low and high cases instead of averaging the endpoints.
Questions about Cold Stratification End
Should germination and survival be combined in Cold Stratification End?
Combine them only when the formula explicitly names both rates; otherwise keep each loss stage separate.
How does “Some species require alternating warm and cold phases.” affect stratification end day?
Cold Stratification End uses the entered numbers only. Let stratification start day reflect that condition before calculating.