THC Academy course
Environment, Light & VPD
Treat environment as an interacting system of light, temperature, humidity, airflow, atmospheric demand, and root-zone supply.
Course outcomes
What you should be able to do
- Treat temperature, humidity, VPD, airflow, light, leaf temperature, and root-zone water as interacting variables.
- Distinguish instantaneous PPFD from daily light integral.
- Map environmental variation across space rather than relying on one sensor or one light reading.
- Use plant response and measurement context together when adjusting the environment.
Guided sequence
5 connected units
1Light distributionMap high- and low-light zones across the canopy.Open →2Temperature & humidityUnderstand how temperature and RH combine to shape evaporative demand.Open →3VPD & transpirationConnect VPD to stomatal behavior, leaf temperature, water movement, and changing plant demand.Open →4Airflow & boundary layerVisualize the still-air boundary layer around leaves.Open →5Supplemental lighting & DLIIntegrate natural and supplemental photons across the day.Open →