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You know, I actually put them outside last year, and ended up getting mites and caterpillar webbing in them, until I brought them back in. Dwarf citrus trees are touted as being great indoor plants. Sure, they can be planted outside, but indoors, they will blossom and fruit, and as long as you give them the proper environment, they'll thrive inside in a sunny location. Keep the dead branches and dead growth clipped so the root energy gets focused towards the new growth, keep them in pots big enough to keep the trees from getting root-bound, and you're good. These are on a glass and wicker table against a sunny window, and they've sprouted new greenery several times now. One of them (I believe it was the Clementine) did get a bundle of blossoms, but they fell off. (That's natural for the first couple of years. Some nurseries actually recommend clipping the first blossoms off to promote a bigger sprouting the next time.) Mine have doubled in size in one year. And, as you can imagine, the fruit are totally edible. Trees like the Key lime are considered 'true seed', meaning that they're not grafts. You get the same characteristics as the parent seed. I love Key lime anything. The trees will only get as big as the pot size you keep them in, and citrus fruits will take up to nine months to mature. Plus, they will add a little aroma of citrus oils in the air in your house once they finally mature. God willing, I'm looking forward to grilling a salmon steak and picking and squeezing a ripe lemon on it while it cooks on the grill.