Anyone know bout VPD?

[Tomcat420]

If my plants keep showing signs like wilted leaves and nutrient burn or deficiencies what would I need to do it help it in terms of VPD raise temp or humidity?

 

[Ramblinrose1965]

Try and match the humidity to the temperature using this chart for the various stages of growth.

 

[Janluna]

 

[Delps8]

If my plants keep showing signs like wilted leaves and nutrient burn or deficiencies what would I need to do it help it in terms of VPD raise temp or humidity?

Good intro to VPD here.

VPD requires two temps - ambient and "leaf surface temperature" which can be determined using a IR temperature gun. Lacking that, you can ballpark -2 as your LST but, as with spending money in a light meter, for $30± you can remove all doubt.

If you're running into issue, the graphic belowis a good guide re. what makes a grow work.