Seasons and Greenhouses
Season Extension Gain Calculator
Use Season Extension Gain when you need to combine spring and fall season-extension gains. It calculates total season extension from the measurements shown below.
Enter values for total season extension
Season Extension Gain needs spring extension and fall extension from one case.
Formula for total season extension
Season Extension Gain combines Spring extension and Fall extension to produce total season extension.
The starting case sets spring extension at 18 days and fall extension at 24 days. Its total season extension is 42 days.
Measurements for Season Extension Gain
Season Extension Gain uses Spring extension and Fall extension. The Season Extension Gain entries share one scope.
- Spring extension. Default in Season Extension Gain: 18 days.
- Fall extension. Default in Season Extension Gain: 24 days.
Field notes for Season Extension Gain
Recalculate after changing a covering, setpoint, ventilation rate, crop load, or equipment capacity. The Photoperiod Extension Calculator provides light extension needed.
Using the Season Extension Gain result
Use Total season extension to combine spring and fall season-extension gains. Keep the Season Extension Gain inputs beside the output. Need ventilation airflow? Open Greenhouse Ventilation Rate Calculator.
Total season extension: practical constraint
Extension days are site- and crop-specific estimates.
Purpose of the total season extension estimate
Combine spring and fall season-extension gains. Season Extension Gain limits that task to Spring extension and Fall extension.
Save Total season extension with the Season Extension Gain units and scenario name. For harvest deadline day, use Harvest Deadline Before Frost Calculator.
After calculating total season extension
For Season Extension Gain, preserve Spring extension and Fall extension and the resulting Total season extension.
Mark spring extension as observed or assumed and cite the product label, test, count, or measurement when applicable.
After use, record what happened in the garden on the same basis as total season extension.
A second Season Extension Gain scenario
In a Season Extension Gain sensitivity check, compare spring extension at 18 days and 19.8 days. Total season extension evaluates to 42 days and 44 days, respectively.
Both cases hold fall extension unchanged; preserve the other Season Extension Gain inputs too.
Prefer measured spring extension ranges in Season Extension Gain.
Questions about Season Extension Gain
Can Season Extension Gain guarantee field or greenhouse conditions?
No. The total season extension value reflects the entered dates or readings. Confirm it with a current forecast or sensors positioned near the crop.
How does “Extension days are site- and crop-specific estimates.” affect total season extension?
Run a separate case if it changes spring extension; combining unlike conditions can hide the practical difference.