Thanks
I read their information page and see what they advise. I value their opinion. They also list Fox Farms soil as a good choice. Guess what is in Fox Farms? They also list Miracle Grow soils as a good choice. I do not like their products or their company.
There are other valuable opinions as well that may not agree on everything. I'm running 100% listed organic materials including high P guano. I'll see how this works out. So far this grow is one of my best ever.