Seeds and Propagation
Propagation Loss Allowance Calculator
Propagation Loss Allowance requires one defined scenario. Plan starting material from a measured propagation success rate. Use finished plants required and propagation success from the Propagation Loss Allowance record.
Enter values for propagules to start
Propagation Loss Allowance needs finished plants required and propagation success from one case.
Finished plants required and the other inputs
Propagules to start is calculated from Finished plants required and Propagation success. Check the Propagation Loss Allowance units before editing. Hardening start day: Transplant Hardening Start Calculator handles this follow-up.
Finished plants required. The Propagation Loss Allowance target is 150 plants in the starting case.
Propagation success. Propagation Loss Allowance enters 72% for this percentage.
A practical check for finished plants required
Compare the planned quantity with the number that reaches the output stage named on this page. A separate estimate of tray occupancy comes from Plug Tray Occupancy Calculator.
Propagules to start: condition to verify
Use recent results from the same species and propagation method.
A zero Propagation success leaves propagules to start undefined in Propagation Loss Allowance.
Arithmetic used for Propagation Loss Allowance
Division connects Finished plants required and Propagation success in this Propagation Loss Allowance calculation. Test estimated seeds separately in Seed Weight to Count Calculator.
Propagation Loss Allowance evaluates finished plants required at 150 plants and propagation success at 72% as 208 propagules.
What the propagules to start output means
Use Propagules to start to plan starting material from a measured propagation success rate. Keep the Propagation Loss Allowance inputs beside the output.
Extra propagules for expected loss supplements propagules to start in Propagation Loss Allowance.
Use recent results from the same species and propagation method. Check finished plants required before applying propagules to start.
Propagation Loss Allowance low-and-high comparison
Create a second case by setting Finished plants required to 165 plants. The initial setting is 150 plants, and the corresponding propagules to start values are 208 propagules and 229 propagules.
This keeps the effect of finished plants required distinct from changes in the other Propagation Loss Allowance inputs.
Do not replace the source measurement merely because one scenario gives a preferred answer.
Common questions about finished plants required
How does “Use recent results from the same species and propagation method.” affect propagules to start?
No automatic adjustment is applied for it. Use a site-specific value for finished plants required when the condition is present.
Should seed-lot performance be updated for Propagation Loss Allowance?
Yes. Use a current lot test when germination or emergence affects propagules to start.
What scale does Propagation success use?
Propagation Loss Allowance reads Propagation success on a 0–100 percentage scale.