i don't know what i'm doing wrong!
i planted 3 citrus trees late last year (a blood orange, a lemonade, and a lime), and they were going along fine, until a couple off weeks ago when their leaves started to turn yellow and fall off. some of their branches are now bare -- and other branches are thinning, but have new leaves on the tip. i'm very worried about them -- i don't want them to die!
could i have over-fertilised them? under-fertilised them? over-watered them? under-watered them?
how can i tell?
what should i be doing for young citrus?