I was using Advanced Nutrients cal mag but I've almost ran out. I bought so Professors:Go Green today but I'm starting to reconsider my purchase.
Has anyone used it before and what is your take on it?
I did hear today that canna is releasing a calmag in about 6 weeks time that's low in Nitrogen. Probably won't be in Australia for months though 😔.
I also heard something about VPD
I use this one.
There was something about VPD in chat somewhere with GMO I think, he said not to worry too much.
I suppose it all depends on how the Humidity and Temperature fluctuates. A sudden drop or raise in humidity is what brings the nasties like powdery mildew apparently so i've heard. Maybe Macky or someone can varify?
Look up negative and positive air pressure as that also includes the VPD chart so maybe a good understanding of this may help?
I wouldn't know about the cal mag. I would always seek a natural or organic alternative 1st. But that's me lol
Happy Growing Yoda.
Maybe this one would be easier read?
I think the whole VPD thing just over complicates things for no reason. If the temps and humidity are right in the grow room, for the right stage of growth, then you're at the right VPD anyway. Keeps temps and humidity at the right level with good extraction and some decent fans and you'll be sweet 
As for the Dr green, never used it mate, but these food are all essentially the same thing, you just have to check whats it, which should be on the side of the bottle. Check with the other food to see if it clashes with one of them, to make sure you dont give too much of one thing, and not enough of the rest
Send Macky BTC if you think cannabis is cool!
BTC Address: bc1q9nqqyu79lsnw4u7h6rrdsre8yxq5wn5jfhlarx
"There are many ways to go swimming with a cat”
― Macky
Our forum is free to join. We are an international cannabis forum that helps people all over the world grow their own personal supply of cannabis. Through our site you will find cannabis breeding forums, cannabis deficiency forums, indoor cannabis growing forums, and much more.
We are a home growers cannabis forum, and we only allow people who grow cannabis for personal use to be members. Our mission is to help you grow your own cannabis. We do not buy/sell/trade cannabis, or equipment for growing cannabis. Our site is strictly a cannabis smokers forum, cannabis growers forum and forum for medical cannabis users.
Use our guides on how to grow cannabis, cannabis grow diaries, and growers forum to find all the info you need to learn how to grow your own cannabis.
Any member who is suspected of growing cannabis for commercial gains will be banned immediately.
Please read our forum rules, and enjoy the site.
Find us on all social networks! Just search for Percys Grow Room