Switching to PRO-Mix HP with Mycorrhizae was one of the biggest improvements I made in my grow process.
Before this, I was growing in hotter soil mixes and constantly fighting runoff swings, pH instability, and occasional lockout despite measuring inputs and trying to stay very technical with the process.
PRO-Mix gave me a much more controlled and predictable root environment. Once nutrients became the responsibility of the grower instead of the soil, everything became easier to manage. No lockout issues, no surprises, and much more confidence in understanding exactly what the plants were receiving.
You give up the buffer of a hot soil, but you gain a level of control that I’ve really come to appreciate. I love this medium.