Mums can be overwintered indoors by allowing them to go dormant in a cool, dark location. To keep mums as houseplants, they need sufficient light, regular watering, and occasional fertilization.

Garden columnist Dan Gill answers readers' questions each week. To send a question, email Gill at dgill@agcenter.lsu.edu. I purchased a blooming potted chrysanthemum plant. How long do the flowers ...