Christmas cacti are generally known for their ability to produce flowers in the winter, specifically around the Christmas season. They are popular for their brightly colored blooms that bring a festive touch to homes and gardens. To ensure healthy growth and abundant flowers, fertilizing a Christmas cactus is essential. The best time to fertilize your cactus is during the growing season, typically between April and September. This provides the plant with the necessary nutrients to produce lush foliage and vibrant flowers.