Linda, I am afraid that I have tried many applications of Meyers and never like the result, in complete contradiction to John and many others to me anything that has a Meyer in it would be better with a traditional lemon. Meyers have a "dirty" taste most of the time and at best have a weak orange flavor. I cannot tolerate drinking anything with Meyer in it, or any fresh application. I have made cakes, curds, pies, lemonades, fish with lemons cooked or grilled on top, etc with Meyers and never particularly like the result, though cooked they are more tolerable then anything with the fresh juice. However I had to toss out the salmon I made as the orange undertone flavor was awful. I just tried a jar of preserved lemons I made with Meyers and they were very bland compared to traditional preserved lemons. I keep trying to like them but I haven't found anything I prefer with them in it yet, mostly just things I find less offensive. I used to cook professionally and used Meyers pretty consistently in many applications and still never cared for them (same with kumquats though I REALLY don't like Kumquats and don't even want to try them in things anymore). I am pretty sure I am a traditional lemon kind of girl, which means more Meyers for the rest of you that like them! ;) Also I agree that its likely that your rootstock is taking over, cut off any branches that have different fruit and take note if the leaves look different in any way to your orange, that way you can identify it earlier and remove branches before they fruit and steal energy away from your oranges. Take pictures so if it happens again years from now you won't be struggling to remember what they looked like. Its likely that your neighbor had a tree whos scion died back/was taken over by its root stock at some point. If your friendly with them and they are the ones that planted the tree ask them what kind of tree it was when they planted it and if it changed at any point. If they didn't plant it they may not know. If you show us a picture of the tree we could help you figure out when to prune it.

kmas, you would want to water at the drip line and a bit beyond. That's where the feeder roots reside. Hard to know what that drip line might have been, since the tree has been trimmed, but 5' would not be unusual for the age of the tree. I would attempt to water at least 3' out if possible. The drip line is certainly beyond 1' with the age of this tree. You can set up micro sprinkler emitters that point outward from the trunk at 12 3 6 and 9 o'clock. Or, at the least two points. For fertilizer, apply at the drip line. I would use a citrus fertilizer as it will have more N in proportion to P and K, and it should have micronutrients as well. Several good options out there. You can get Vigoro Citrus & Avocado fertilizer at the big box stores. Patty S.

They are planted in a new bed built last fall and filled with top soil that was recommended to us for vegetable gardening beds. We let that settle through the winter and in the spring we tilled it and topped it off with garden top soil. I did not add additional fertilizer as the garden top soil mix had fertilizer in it. If the other two tomato plants in the bed don't look as yellow-green and do not have the black spots with yellow halos, could the problem still be specific to the soil or watering in general? I'm wondering if these two plants I bought were simply not healthy to begin with (they're both from one nursery and the others are from two other nurseries). Also, in terms of putting fertilizer on the soil - do you mean something like this: http://www.amazon.com/Jobes-09026-Vegetable-Granular-Fertilizer/dp/B002YOJDAS/ Thank you SO much for your help!

Silva- My trees look just like yours lately... I am in central Florida so took soil samples to UF 8n January. We were in a drought then. Numbers were ok. Few leaf miners but that is no big deal. Then about May? the trees starting looking poor. Much rain. Over the summer we have had 2-6" almost daily. On August 20th we had the total amount of yearly rain already. Took another sample of soil in and times/fertilized. UF says the huge amount of rain is washing nutrients from the soil throughout our region. The trees are not really 'thirsty' so even when fertilizer is applied it is not taken up because ground is always wet. Then that days rain ...and the next... and so on... wash away the nutrients. Everyone zI know is having same problem. Scary because I don't want our wells contaminated with fertilizer salts.