well the holes look a little small in the pics but its hard to say. I mixed happy frog soil conditioner, steer manure, happy frog potting soil, fox farms Ocean Forest soil, Earth worm castings, Local soil, and bat guano together for my mix. my holes are roughly 3'l x 3'w x2'D. I also ammended the surrounding soil with Happy frog soil conditioner and steer manure spread evenly over the suface and mixed/watered in. I have not fed a single time yet. One of the plants has been in the ground for two months.
Though I am about to start feeding and top dressing the area.