What do you feed your trees? Mine are that big but not as bushy. Mine live in 25 gal pots.
I havent given this one much fertilizers, just some citrus/avocado blend stuff once a year. Ive got some larger trees that seem to not be real picky about fertilizers. Avocado fertilizer works, or fresh chicken droppings, cotton seed meal, potassium sulfate, chelated iron,... I have used all of those things on them. Im pretty much just using uncomposted chicken manure on all fruit trees now and everything seems to take it just fine.