Food or water or all the above .
I have a Mexican Thornless that when I bought it I lost 50 % of the leaves and all the fruit and blossoms fell off. I am a little confused on the watering end and when to fertilize . I have been reading a on the forum here and I remember seeing a tree that looked like mine now. I also read of something they called Yellow Vein Symptom . Thats what mine looks like now Oh I have had this lime for 8 months had a nice flush and now this.

Any thoughts Thanks