Evaporation or Plant Uptake??

[orchidjunky]

Considering you got your culture totally on the mark... how much of the resrvoir loss is truly from plant uptake??

For example 40% Plant uptake 60% evap??

I know this also depends on relative climate in your area and greenhouse vs. outdoors vs. indoors..

But lets use the example of indoors on a west windowsill a paph..