Ive been using Hormex liquid it has IBA/NAA in it. I kinda figgured it out after doing a tissue culture with IBA seeing how quick the stem bulked up and showed nubs. Hormex was liquid, and I could simply drop it onto the cube. 2 drops will do it. And I set a personal record with it, got a Sour Dub to show roots to the bottom of a 1.5 cube in 4 days.