Place the Easter cactus near a sunny window but out of direct sunlight. Bright, diffused light leads to the best blooming on the cactus. The Easter cactus produces flower buds during the normal day length of spring, so supplemental lighting isn't necessary.
Keep the temperature near the cactus near 65 degrees Fahrenheit during the day and as low as 55 F at night. Easter cactuses require cooler temperatures to set flower buds successfully.
Allow the top 2 inches of soil in the pot to dry slightly before watering until the plant begins to set buds. Once buds form, increase watering frequency so you water when the top 1 inch of soil begins to feel dry. Mild drought stress encourages the cactus to set buds.
Begin fertilizing the cactus after the buds open and blooming begins. Apply a soluble houseplant fertilizer once monthly following the rate recommendation on the package. Continue to fertilizer through summer. Easter cactuses don't require fertilization in fall or winter.