I’m glad you’ve asked because it’s for every type of setup regardless whether you’re doing water culture or soil or coco or hydro because when you adjust the temperature and RH to provide the right environment, you obviously didn’t know this but that comes from the VPD chart and to simplify things people just go by temperature and RH but if you want to maximize on your yield and provide the best possible environment for your plants, if you want to control when and how much nutrients they update, I highly recommend look into the VPD and what it’s all about and how to follow the VPD chart. I’m going to provide all this information I just hope you will actually read it. Whether or not you follow it is your choice but you should definitely educate yourself on it and I’m pretty sure once you do you will never grow the way you did before without following VPD chart.
Chart: https://growsensor.co/indoor-growing/the-ultimate-vpd-calculator-environmental-timeline/
Chart: The Ultimate Vapor Pressure Deficit (VPD) Guide - Pulse Labs
Chart: https://www.dimluxlighting.com/knowledge/blog/vapor-pressure-deficit-the-ultimate-guide-to-vpd/
Make sure you buy yourself an infrared thermometer to measure your leaves temperature because to follow VPD chart properly you’ll need to measure the offset temperature of your leaves. Usually your leaves are going to be up to 5° F lower than your room temperature and that will change up your chart. Sometimes it’s 2° lower sometimes it’s the same temperature as your room so when you start doing things properly you will see how much better your plans are going to be growing and uptake will be optimal and respiration on point.
This is what professional grows at home and commercially are all following. When I first learned about it I quickly realized how stupid I am or uneducated because temperature and relative humidity adjustments come from the VPD
. Who would have thought 

I’m happy to share this knowledge so whoever is interested can increase their yields and performance!







lol and lightly burned my seedlings. That was a long time ago but lesson learned! That usually happens with intense lights not cheap lights. When I was using Mars hydro, Roleadro Galaxyhydro, Atrium, and some other cheap Chinese crap, they don’t really affect the temperature on my thermometers because they are not that intense and they don’t reach them but once you step your game up and get better light like Platinum LED or BlackDogLED or Kind LED K3 or K5 series is what usually home growers get.



