Help on Growing a Christmas Cactus

Location

• Christmas cactus requires bright light to put on the healthiest growth. A location that provides minimal direct sunlight but all-day bright light is preferred, such as near a south-facing window. Direct sunlight can scorch the foliage, leading to reduced flower bud production and leaf damage. When choosing the best location for your cactus, avoid areas near air and heat vents, as the dry air and temperature fluctuations may damage the plant. Also avoid locations where the cactus is exposed to freezing temperatures, such as near doors that open frequently in the winter months.

Soil and Moisture

• Like most tropical cacti, Christmas cactus plants require moister soil than desert cacti. Plant the cactus in a well-drained soil that contains organic matter so it doesn't dry out quickly. A soil mix containing 2 parts peat moss and potting soil combined with 1 part perlite provides sufficient drainage and moisture retention. Water the cactus when the top 1/2 inch of soil feels dry, keeping it evenly moist at all times. Overwatering causes the plant to drop its buds and fail to flower.

Fertilizer Needs

• Christmas cacti only require fertilization during the late winter, spring and early summer period. In late summer and fall, the plants begin producing flower buds and require no additional fertilization at this time. Apply a soluble, high-potassium fertilizer every two weeks following package application instructions and supplying it at one-fourth the label recommended strength. Begin applications in winter when the flower buds begin to swell and open, and continue to apply it through July.

Blooming Requirements

• The cactus requires cool temperatures and limited light during the fall season to successfully set flower buds for winter blooming. Keep the cactus in a cool 50- to 60-degree Fahrenheit location for two to three months from early to late fall. Limit light around the plant so the cactus receives 13 hours of complete darkness each day for six to eight weeks, or until it sets flower buds. Accomplish this by covering the plant with a paper bag or setting in a dark closet for the prescribed 13 hours daily. Once the buds form, the plant no longer requires complete darkness but still benefits from the cooler temperatures.