Keep indoor kalanchoes in natural lighting only, starting in October. Do not put them near indoor artificial light sources. Kalanchoes bloom in the winter, with the buds triggered by at least six weeks of short days with eight to 10 hours of light. For outdoor plants, the light hours will naturally shorten during the winter. Indoors, the plant must be moved where it only gets natural light until buds form.
Cut off spent blooms after the first bloom period. Cut the flower stalks back to just above a set of leaves after the kalanchoe has finished blooming.
Apply all-purpose fertilizer every two weeks, when new growth appears in spring, at one-half strength. Dilute 1/2 tablespoon of fertilizer in 1 gallon of water in a watering can and water the fertilizer into the soil. Once the plant blooms, stop fertilizing until the next growth cycle. Check the package instructions as rates vary by brand.
Keep the daytime temperature at 70 to 75 degrees Fahrenheit, with night temperatures 10 F lower for indoor plants.
Water with room-temperature water when the top of the soil feels dry. During the period after blooming until new growth appears, the plant will use less water.