Mom’s Christmas Cactus, as she’s fondly called, is somewhere between 80 and 90 years old and still a looker. Diane Waite of Menasha has a cactus propagated from that plant, a gift in the 1970s ...

Another reason to prune Christmas cactus is to control its size. “An old plant can trail more than 2 feet,” says Hancock, adding that these plants can live for decades. Finally, gardeners may ...