Christmas cactus is a popular houseplant that is commonly associated with the holiday season. The Christmas cactus has beautiful, pink flowers that bloom in late fall and early winter, making it a popular choice for decorating during the holiday season. The best time to feed your Christmas cactus is during the spring and summer months, when the plant is actively growing and producing flowers. During the fall and winter months, the plant is dormant and does not require as much fertilizer. It is important to keep in mind that the Christmas cactus is a tropical plant and requires plenty of water and bright, indirect light.