I have had problems with my citrus because of heavy clay soil which is wetter than citrus likes. Since they will grow in my area with shelter from freezing weather. I tried 12 inches of garden soil in a 4 foot fiber glass ring. Then surrounded the trees with wood chips outside the 4 foot, leaving the garden soil only around the trees because the roots like well drained soil.and it is in my food forest. I planted comfrey by each tree. They are taking off where others did very poorly and eventually died. This is my second year since planted. They suffered from a late frost but are still thriving. Will keep progress posted. I am in Central, Louisiana and it is zone 8 to 9. I also removed the rings after I filled them with soil, planted the trees and they were established for a few months.
