Definitely a grow log. If a problem arises, you can scan back through your notes. It's a good way to not repeat mistakes. Then after 20-30, almost 40 years of growing and breeding as we've done, it becomes second nature! When changing supplements/ amendments, it's always good to keep tabs on it along with pH in soil/ water/ medium. We go with diluted or organic teas and never have problems.@aridbud @Gweedo's Growroom Thank you both! I’ll check out everything you recommended.
The Cannabis Breeders Bible is the one I’ve been leaning towards. And keeping a grow journal is something I need to start doing. Great advice!