Thermometer/hygrometer placement

One of primary drivers of photosynthesis is the temperature held within the leaf, or LST leaf surface temperature, if you measure canopy it will normally fall a few degrees F lower than ambient. I hold 80F which should give me around 77f, optimal at 400ppm, I would give up to 88F under 1500-2000ppm if you aiming for maxing out the curve. Bottom intake, canopy and top of tent should be measured.

Hey bud 😊 I did some test on my grows by placing multiple thermometers at different levels and now I get by by leaving it hanging close to the top canopy of the plant. I was also advised to tape it to the side walls at canopy height but I'd like to keep it at the centre of my tent to get a good overall reading. I still keep multiple devices at different levels as a fail safe but the one hanging above the centre pot is the probe going to my Growhub controller. Hope this is helpful!

I always had couple. Main priority is still canopy top level.