Leaf and Flower temps?

Using an IR temp meter, what do you like to have your leaf temps approximately?

How about flower temps?

 

[Delps8]

My leaf surface temperature is almost always 2° (F) lower than ambient. My grow is in an unfinished garage attached to my house in Southern California so I can influence the temps but not control them. My temps of the last three months are attached. The temps fell off after my harvest a few days ago.

Are you familiar with vapor pressure deficit? I'm asking because leaf surface temperature is one of the values used to calculate VPD and VPD is a big issue when it comes to plant growth.

Check out this site for info on VPD.

 

[Tom Bombadil]

dont pay much attention to that outside of vpd leaf offset.

 

[BII]

I prefer leaf temp. ≤75˚F and air temp. ≤80˚; with (as reported) the leaf temp. essentially always lower than the air temp. due to leaf evaporation/transpiration cooling.