FERTILIZE ME!!!
Fertilizing your trees correctly is a big part of having healthy trees-when you use the soil mix I do (akadama,pumice,lava,charcoal) it's imperative. Since there is no organic material in the soil, the trees health is reliant on what you give it.
I use a mortar tub to mix the ingredients, which are all organic meals. Cottonseed, blood, and bone meal are used (5p,1p,1p) and then I throw in 3 parts organic pellets which hold it all together when the cakes are made. The pellets are from a nursery, and their NPK is 7-5-7. This is a mix that was given to me after a discussion from some club members of BIB, and it worked GREAT last year.

Heres what it looks like with the water added, just enough to make it the consistency of soft mud. I use the putty knife to keep the end edge clean, as i drag the melon baller up the edge of the mortar tub, pressing firmly to form the cakes. The trick I found is using a cup of water and dipping the melon baller every couple of cakes, so that the balled up fertilizer comes free of the melon baller without sticking.

Once the plastic plates (thanks IKEA) are full, they are left to dry out, and then scrape them off the plastic plates with the putty knife. Whatever little bits fall off, I throw that in the garden for the peppers, and place the cakes as needed on the surface of the trees, fertilizing slowly every time I water. I replace them monthly, turning my trees when I do that, and throw the old cakes in the garden, and replace with new cakes.

Here's a shot of the finished product-this ought to get me started....