How Big Can a Kalanchoe Get?

Distinction

• Although all 200-plus species bear the Kalanchoe genus name, Kalanchoe blossfeldiana is commonly called "kalanchoe" in the United States. Like all species in the genus, kalanchoe is a succulent, which means it has thick, fleshy leaves and stems that store water. If you live outside its perennial range of U.S. Department of Agriculture plant hardiness zones 10 through 12, you can grow a kalanchoe as a houseplant. It grows slowly and typically reaches a height of 6 to 18 inches with an equal spread.

Light

• Proper light is the primary contributor to plant growth indoors, according a University of Georgia College of Agricultural and Environmental Sciences website article. Whether you grow a kalanchoe inside or outside, give it at least four hours of direct sunlight. In some areas, afternoon sunlight may be too harsh; in such a location, place the plant where it receives morning sunlight. If you grow a kalanchoe in low-light conditions, its growth may be lanky, and the plant may become weak.

Water

• As a succulent plant, kalanchoe’s drought tolerance is an adaptation to living in the arid climate of its native Madagascar, which receives fewer than 10 to 15 inches of rainfall per year. During the plant's active growing season, water its soil only after the soil dries completely. Water thoroughly, until the soil is saturated and the water drains freely from the plant pot's bottom drainage holes. If you only sprinkle the soil with light waterings, the plant’s growth may be distorted, and the plant cannot grow to its potential. During winter and in a low-light area, water a kalanchoe just enough to keep it from withering.

Soil

• A kalanchoe flourishes in soil or a soilless mix that drains well. It is susceptible to rotting if its roots are submerged in water. A suitable planting mix typically consists of 1 part potting or garden soil plus 1 part coarse sand. Test the mixture for correct consistency by watering it, grasping one handful of it and squeezing the water out of the handful. If it is a good succulent mix, it should fall apart instead of clumping together. Alternatively, use a soilless mix packaged for cacti and succulents.