So my citrus grove, which was planted about a dozen years ago, has done generally poorly, a few trees died altogether, many are very tiny and close to going out, a few are bigger but still much smaller than they should be and the fruit is not great. Two or three are inexplicably the expected size but do not fruit well.
Because they grow so little or are even shrinking they cannot shade out the bahia which unless controlled grows solid around the trees. We have many times cleared out by hand, we have fertilized with compost and chem fert at times, we have irrigated at times a lot, nothing seems to make a difference. So this year I am clearing out the grass by hand (as many as 40 or more trees) on the more hopeful ones, putting down some organic N and other minerals, and also heavily seeding under the trees with hairy indigo. My intuition was that this would be a good strategy, and in fact I found a UF extension service bulletin from 1962 detailing the results of hairy indigo trials as a cover for citrus and the conclusion was hairy indigo highly recommended.
Maybe this will save most of the trees, or at least some.