most of my trees are still young but i do have between each tree a garden bed that is about 5-6' in depth and probably about 12' long between each tree. well, that is the plan when i have everything laid out the way i want it. i only have 3 beds so far done like this and i plan for more. but gardening & landscaping for me takes years to have everything the way i would like it.
right now i have between a few pear trees my garlic patch, i've done a potato patch one year, some brassica-sprouts, cabbage, kales, collards last year and onions too. i know allums are good around fruit trees. i thought i read it in a companion planting book.