8 Plant 4x8 DIY RDWC Set up

[CBDfutute4]

I would be deathly afraid of anything above 50% rh with how crowded they are

Have u ever lost a whole crop ?

 

[Aqua Man]

Can I shed some light?

Low humidity is often a big contributing factor to PM.

So what puts us I'm a dangerous place to get it... low daytime humidity and high night humidity.
Why? Spore dispersion in low humidity during the day... gonna spread like fire.

Good germination conditions at night.

Now usually takes a few consecutive days of this before you may see issues.

Now VPD and the truth behind it. ONLINE CHARTS are absolutely a good way to ruin your grow. You absolutely MUST calculate your own.... why because you need to calculate leaf temperature to get the actual KPA (VPD). without doing this you have absolute BS info to work with. Garbage in = garbage out.

If anyone wants examples of how much difference this makes I can give them... it is a huge difference.

You want to go by the actual KPA value for stage of growth. MANY MANY ppl are using FAR to high of RH and not calculating thier VPD properly.

I'll leave this here. And yes I'm on a mission to fix these ABSOLUTELY BS charts so no more growers fall victim and give VPD bad rap... because it is an extremely helpful tool when used properly. I'm sure many will get sick of me doing this but that's just to bad.

Thread and link to calculator below.

VPD Calculator - Vapor Pressur - Apps on Google Play

Simple calculator to generate VPD based on Air/Surface Temps and Humidity.

play.google.com

VPD (vapor pressure deficit)

Ok i was gonna sit down and write out a whole article but i have been lazy so instead instead I'm going to copy paste because im lazy. This is not my work so let start. You may find this very long but its worth the read. Some may want to skip ahead. I have added here and there to what i feel is...

www.thcfarmer.com