Light + leaf temperature
Light distribution changes photosynthetic opportunity and can change leaf temperature. A single center-canopy reading may miss edge, top, or shaded-zone extremes.
PPFDDLILeaf temperature
Environment Deep Lab · Whole-Plant Context
The plant experiences a microclimate, not a room-average number.
Connect PPFD and DLI, air and leaf temperature, humidity and vapor pressure, airflow, CO₂ context, substrate moisture, root-zone temperature, pH, and EC to the plant processes they influence. Measurements become useful when they represent the plant’s location and the time of the response.
Humidity, vapor pressure + airflow
Temperature and humidity jointly define vapor conditions while airflow changes leaf boundary layers. Room RH alone cannot describe the leaf-air exchange environment.
RHVPDAirflow
Supply must match shoot demand
Substrate moisture, root-zone temperature, oxygen conditions, pH, and EC influence the root system’s ability to supply water and ions while the canopy is demanding them.
Ask what changed first
- Map sensors to plant position rather than relying only on room averages.
- Compare day/night and irrigation-cycle changes.
- Record the timing of environmental excursions relative to symptoms.
- Preserve method, units, calibration context, and sensor location.
No single setpoint describes the whole plant
Environmental variables interact, and canopy averages can hide local extremes. Stage, genotype, root-zone state, measurement method, and time all affect interpretation.
Evidence boundary: a VPD, PPFD, temperature, RH, pH, or EC number is context—not a standalone diagnosis or universal prescription.