1.02 kPa Veg
VPD Heatmap
Air RH × Air Temperature — click chart to set values, activate target mode to navigate
← Air Temp
Air RH →
Building heatmap...
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VPD Target Navigation
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Settings
Display
Temperature unit
Show grid lines
Show VPD contour labels
Crop
VPD Zone Ranges
Below dew point → condensation
0.0 – 0.4 kPa → under transpiration
0.4 – 0.8 kPa → propagation / early veg
0.8 – 1.2 kPa → late veg / early flower
1.2 – 1.6 kPa → mid / late flower
Above 1.6 kPa → over transpiration
About
VPD calculated using the Tetens formula.
SVP = 0.6108 × e^(17.27T / T+237.3)
VPD = SVP(leaf) − SVP(air) × RH%