I haven’t gotten “burn” from AACT. I do soak fresh organic soil mixes IN the heat of the day to promote a good ”inoculation”. But never WITH plants during the day..
You can get organic “burn” from “hot” or “wet” manures drying and actively decomposing, cooking the roots, (chicken, steer) usually accompanied by hot ambient temps.
Some people use “organic” potassium sulfates. Which can cause salting and nutriant lock out.
I am going to try Langbeinite this year 0-0-22, as opposed to sulfates 0-0-50.
And forget those haters bro.