I'm not quite sure of the exact mechanics of making a hybrid flower, but I know that you must have two of the same kinds of flowers (Different colors, though, of course) be right next to each other. And sooner or later, another flower will pop up next to one of them. It's color is determined by the colors of the flowers you put next to each other. For example: White tulip+ Red tulip= Pink tulip! I hope I helped!
Wait, a side note. It might only happen in March through August, when the honeybees come out.