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.

Theres a chance its spider mites, if so mix a spoon of oil, a tiny drop of dishwash liquid and a litre of water, spray the leaves and stems top and bottom (try not to get on the soil to prevent it getting too wet) , it should kill any spidermites, if there there they are so small you probably wont see them, like tiny specks of dust on the leaves normaly, you can usualy see red on a tissue if you wipe the bottom of the leaves, but not always If you can get neem oil , use a spoon of that in the mix and then it will kill most pests as well. The tips of the leaves look (where they are brown) possibly like a build up of salts from fertiliser or the water, if so you can sort this by a spoon of white vinegar in the next watering, its not a real problem though, bt worth doing The fertiliser realy needs to be a citrus one, as they need a high level of nutrients, and unlike most plants they need a wide range of minor elements to keep them happy, fertilising over the winter if its not outdoors is a good idea (just les often due to less water use) , the fertiliser will be used to build the plant up to flower next year I would have thought they should have flowered, this can be down to fertiliser, but more often due to lack of cold hours in the winter, they need a certain number of hours of winter to make them flower next year, about 600 to 800 for most citrus, you can do without this by shocking the plant by letting it dry out for a long time, but its best to let them have cold hours, below about 16 deg C, but not too cold to kill the plant!

Having never tried it, I can only refer to what I've read here and in other publications. Look on youtube at the grafting videos for a visual aid. People here report anywhere from complete failure to all grafts surviving so I think that if you tried multiple grafts, you have an excellent chance of some taking. Remember to keep some orange branches intact while waiting on the grafts to take, in case you need to try again.

It was a good balance of flesh and juice. The peal was very hard to remove but at 7 inches I had a 5 inch ball of seedy flesh. All the seeds were in the sections center crease. I ate mine out of hand. I considered the tree not worth growing and I let both of them die over the winter, They were very aggressive growers and put out 8 -10 foot shoots that I could not protect. 30 gallon transplant into ground 12 foot tree freezing to death 8 foot diameter at 6 feet tall It is big Steve