What do you put around citrus trees?
For existing citrus trees, top dress the root zone with compost, aged cow manure and worm castings. Cover this mix with mulch like mixed tree mulch for a long lasting mulch cover. You can also top with straw or sugar cane mulch which will break down quicker and improve the soil. Make sure you cover the whole area under the tree canopy at least out to the edge of outer branches.