What are some of the causes of die-back? My citrus trees have way too much DB on them, despite being ferted and watered. One of them has actually died. Another bloomed like crazy, it looked fabulous, and then about 2 weeks later - bad dieback.

Frankly, where I used to live in FL (Dade),I never paid much attention to my citrus trees because they did well on their own with a little fert and NO irrigation. Where I live now is further north and has very sandy soil instead of the coral rock "soil" that I am familiar with. It's been very dry here, and I have been watering them by hand -soaking them lx per week. Help, please!

thanks,

Avalon