I am starting a new grow. I have both ff OF and happy frog. Can I add worm castings or would that be too much? How much would I add? I'm obviously mixing in perlite as well.
I will be using Mega crop. Also I have humates, would adding that to my fertilizer help? Perhaps mixing happy frog AND ocean forrest? Whatever combination.
I have mistakenly top dressed too much castings before and as @Nunyabiz mentioned, they can compact and not allow proper absorption or drainage for that matter.