How To Care For Plants

How to care for a Kalanchoe (flaming Katy)

Kalanchoe blossfeldiana

Care facts verified
Kalanchoe (flaming Katy) (Kalanchoe blossfeldiana), the species that wants bright light, including some gentle direct sun
Photo: Sabina BajracharyaCC BY-SA 4.0source

Flaming Katy is a flowering succulent, so it stores water in its plump leaves and resents a heavy hand: bright light and a thorough drink only once the gritty mix has dried right out. Overwatering rots it faster than anything. To bring the dense clusters of bloom back, it needs short autumn days with long, dark nights.

Care at a glance

Light
Bright light, including some gentle direct sunA south or east window keeps it compact and flowering; too little light gives leggy stems and few blooms, while fierce midday sun can scorch the leaves.
Water
Only when the soil has dried right outAs a succulent it would rather be dry than wet — water thoroughly, then leave it until the mix is dry to the bottom, roughly every couple of weeks. Water sparingly while dormant.
Soil
Gritty, free-draining cactus or succulent mixA loam-based compost with added grit or perlite stops the fleshy roots from sitting wet.
Humidity
Low — dry air is no problemIt is happiest in ordinary, even dry, room air; high humidity can encourage rot.
Temperature
15–24 °C (60–75 °F); keep above 10 °CFrost-tender; protect it from cold and never let it freeze.
Difficulty
EasyTough and low-thirst; the only catch is coaxing it to rebloom after its first flush.
Pets
Toxic to petsToxic to cats and dogs — kalanchoe contains bufadienolides, cardiac glycosides that cause drooling and vomiting and, in large amounts, can affect heart rhythm (ASPCA).

Where it comes from

Native rangeMadagascar

Propagation

Kalanchoe is simple to propagate from cuttings. Snip a healthy stem or leaf, let the cut end dry and callus for a day or two — important for a succulent, to avoid rot — then set it in gritty, barely moist compost. Roots form in a few weeks. Pinch out the growing tips of young plants to keep them bushy and full of flowering stems.

Common problems

  • Soft, translucent, yellowing leaves

    Likely cause: Overwatering — the cardinal sin with a succulent, leading to root and stem rot.

    Fix: Let the soil dry out completely before watering again, improve drainage, and remove any mushy, rotted parts.

  • Leggy, stretched stems with few flowers

    Likely cause: Too little light, so the plant reaches and skimps on bloom.

    Fix: Move it to a brighter spot and pinch back the leggy growth to encourage a fuller, more floriferous shape.

  • Flowers finished and none returning

    Likely cause: It needs the short-day, long-night cue to set fresh buds.

    Fix: From autumn, give it about 14 hours of complete darkness and 10 hours of light each day for several weeks to trigger a new flush.

Frequently asked questions

How do I get my kalanchoe to flower again?

It is a short-day plant, so from autumn give it roughly 14 hours of uninterrupted darkness and 10 hours of light each day for about six weeks, keeping it on the dry side. That long-night cue sets a fresh round of buds.

How often should I water a flaming Katy?

Treat it like the succulent it is: water thoroughly, then wait until the soil is dry all the way down — often around every two weeks — before watering again. Water even less while it is resting.

Is kalanchoe poisonous to cats and dogs?

Yes, and it is one to take seriously. The ASPCA lists kalanchoe as toxic because it contains bufadienolides, cardiac glycosides that cause drooling and vomiting and, in large doses, can disturb the heart rhythm. Keep it well away from pets.

Why are my kalanchoe leaves turning soft and mushy?

That is the classic sign of overwatering in a succulent. The fleshy leaves and stems rot when the roots stay wet. Let the soil dry out fully, improve drainage, and cut away any soft, blackened tissue.

Sources

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