Organic Advanced growing techniques

I’ve done teas with guano in the past but not langbeinite. I haven’t used guano in a while though and really only keep it in case I need a high P source in case of deficiency. I do use langbeinite though, however I just build it into my soil. It doesn’t affect pH and it adds sul-po-mag .Here’s a great article from The Rev about it... https://www.skunkmagazine.com/greensand-and-langbeinite/ Personally, I amend my soil for at least a month, plant seeds and top dress every 3-4 weeks. I’d use basic compost teas to increase the micro life and would only use a flowering tea if deficiencies pop up.