Heya,
Was chatting with some dude on reddit and he shot me this link. It became obvious that this was indeed the best VPD tool I've seen on the web so far.
VPD is so important. Even if you don't have it locked into the best range, understanding VPD and how it affects your plants is paramount!
vpdchart.com <----------- check this out!
(link is safe, I talked to Ice)
Just thought I'd share as it may be valuable to some others.
Cheers
B
Bookmarks