I'll check out the Poncans. I have been reluctant to plant citrus because of the Citrus Greening disease. I hate to have to use pesticides on my small lot. I have read about a guy using metalized mulch that's working for him. The other problem I have is that there's a salt water canal behind my house and most things don't grow well in the back yard. I have to plant salt tolerant plants. How in the heck can the branches on your trees hold up to the weight of the tangerines and grapefruit? Do you have to use supports?
*Knocking on wood*... We haven't had any of that particular problem here. At least not yet. Biggest problem we have had with the citrus are the white flies. They leave a black residue on the leaves which starves the plant out because of the reduced photosynthesis. The oddball cure for that is to spray the trees with sour milk (any time except when the flowers are blooming), and that seems to chase the white flies away. I didn't believe it would work either, but it sure enough does.
We tied up a couple of branches on the pomelo that looked a bit spindly and fragile. I image if the tree produces a lot of fruit in the future, that could be a problem. The poncans tend to produce the fruit at the ends of long branches, which will gradually bend down to almost ground level as the fruit gets ripe. Never had a problem with any of the branches snapping, so they must be quite flexible. He have put supports on some of them when it appeared that they were headed towards having the fruits laying on the ground, however.
So far haven't had any bears getting into the citrus, but have had to trap a few possums that got a taste for the tangerines and were being a nuisance. Had to run them out into the national forest to relocate them. Bears would likely destroy the trees climbing up into them, so I hope we don't have to deal with that.
Yeah, from what I have read, citrus isn't real fond of salt in the soil, but perhaps some varieties are better than others, depending on what root stock is used for grafting. It appears that most of the citrus trees you buy are grafted. The stuff we got earlier was grafted onto trifoliata stock, which is supposed to help a LOT with cold and pest resistance. We have one citrus that the graft died off and just the root stock remains. It became one wicked looked thorn bush. It produces fruit but you can't eat them. Smells sweet, but don't try to eat them. LOTS of seeds and they sprout readily when put into the ground, so would make a killer (literally) hedge.