Citradia, I noticed you are growing some of your citrus in decorative cedar mulch. I have two trees growing in cedar mulch, a Xie Shan and a Golden Nugget. Both are doing very well. The only thing about using mulch is the need to insure that the tree is kept well watered, as it dries out faster. The worst medium in my opinion when it comes to watering is the gritty mix.. - Millet