not a question of microbes... question of fungus in the soil.... and it is a fungicide... so i'm imagining it does.
yeah i'm one of those guys. I used to use what I thought were organic products, but in reality they are still full of chelators and other things. I'm done with that. I want my soil to live!
I build my soil from scratch, individual ingredients, and understand how and why it works. I'm tired of throwing away soil. gettin into the 20gal no till containers and i will also be doing 7gal living soil single runs, and recycling that soil for future grows. your soil in organics is your biggest and most important investment. you get the soil right, and the plant grows itself. i'm not even worried about the plant anymore. i'm worried about the soil, and keeping it alive and healthy! I want to be a more sustainable grower too. what happens when the hydro stores disappear because of bullshit laws, or worse, monsanto (yes he's got his hands in the hydro world). i'll have my soil and natural ingredients that are easy to obtain to amend it and i'll be laughin it up!
I've grown plenty of buds in my 5 years doing this, and the more i make this switch to real organic growing, the better my final product has become with every harvest. the initial investment, as with any grow, is the biggest expense. but once you get one of everything... you have a lot of amended soil.
as they say, to each his own. we all achieve the results we are individually looking for in the end. just different ways to get there for different folks.