Answer: It can be difficult to get a kalanchoe to rebloom but if you want to experiment, here's what to do: Kalanchoes are short day plants. Keep your kalanchoe in a cool, dark place so it can form flower buds. Some growers use either a piece of shade cloth (available at plant nurseries) or even a box to cover their plants.
By covering them 12 to 14 hours a day, you may be able to force the plant to produce buds. Once they develop buds, remove the covering and place in a well-lighted area.
Kalanchoe prefer a well-drained soil rich in organic material. Watering once a week should do it, but let the soil dry out before watering again. While it is in the dark, water only half as much as you normally would.
This is the same process you can use to get poinsettias to bloom for the holidays.
Hope this information helps!
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