do I pinch off flower heads after the blooms are gone?
Caring for Kalanchoe Plant
Certified GKH Gardening Expert
You can, after they die. This will also force the plant to grow wider, and more bushy. This article is for a specific variety, but will apply to most flowering kalanchoe: https://www.gardeningknowhow.com/houseplants/kalanchoe/growing-flaming-katy.htm