Q. My husband bought a tree with each branch a different citrus fruit: lemon, lime and 2 different oranges. I have never heard all these fruits on 1 tree. What do you think? A. The tree you bought is called a Cocktail Tree where they bud different types of citrus onto one rootstock . . It seems to be a great idea but rarely works out because on of the varieties inevitably becomes dominate and shunts the other varieties. Also, they rarely tell which variety of the type is used so it is a pig in a poke purchase.  A trick that really works, especially if your space is limited is to buy two or three trees, one each of your favorite type  (orange, grapefruit, lime or whatever citrus you like) and then plant the individual plants all in the same hole . . They all stay on their own rootstock and the dominance issue is negated. And, you can pick your favorite type and variety of that type. People have been successful using this technique for years. It might be a bit more expensive initially but this trick works and the Cocktail Trees have a poor track record. I hope this helps . . Good luck. Terry Mikel