OK.... AMEN!
Since UB kind of brought this thread back to life I thought I'd relate my experience with it last grow. I initially heard about it right here on this thread. Looked worthy of a try so I bought a 32 OZ bottle of MicroKote direct from MK off their website. Painted my final 5 gal pots with it. Took about a minute to paint each pot with a foam brush, stuff dried almost immediately as I was outside in the sun.
I only did 4 pots and did not have any "control" to compare with so can't say anything except the grow went real well for my first indoor grow. Pics in my sig, zip to post #101 to see how they turned out. After harvesting I pulled the root balls and there was not a single root to be seen, anywhere. But when I knocked on the rootball about a 1/4" veneer of soil fell off revealing a mass of roots. The root ball was so dense it was hard to get the soil shaken off. A massive root system of fine roots, from 2" below the surface to the bottom of the pot there was probably not a cubic centimeter of soil volume that was not occupied by roots.
I'll rinse the pots out shortly and touch them up if needed, and paint two additional new ones for my upcoming transplant to final pots in a week or two. I just checked the bottle and I used maybe 4 oz total or an oz/pot. For a small grower like myself this will last me several grows and several years. Stuff is $30/qt, don't remember what shipping was but it was reasonable, less than $40 total if I remember right.
So if I can get 2 grows per application as is suggested that would be 32 pots, at an ounce applied per pot, pot then used two grows for a total of 64 grow cycles. Paying $40 per quart means I will be spending the outrageous amount of 62 cents per pot per grow. My point here this is really not at all expensive.
So I bought it, used it, it worked 100% as described, ended up with a nice grow, and it is inexpensive. All this is fact. What would I have done without it? I have no idea, and will never know, because I'll never go to final pot without it.
Thanks UB for sharing this with all of us 6 yrs ago.