Flaming Katy (Kalanchoe blossfeldiana) care

Succulents & cacti · easy to keep

Flaming Katy (Kalanchoe blossfeldiana) wants bright light with some direct sun. Water it every 10 days. Water thoroughly, then leave it until the pot is bone dry and the lower leaves have gone slightly soft. Never water into the rosette — water sitting in the centre rots it. Pot it in gritty cactus compost, at least half grit or perlite. A balanced feed monthly in spring and summer while in flower, and repot once a year. Humidity: indifferent; dry air is ideal. Toxic to cats and dogs.

Flaming Katy: scalloped succulent leaves under a dense head of small bright flowers, sold in every supermarket and thrown away after one flush. It can be made to rebloom, but only with fourteen hours of complete darkness a night for six weeks — which is why it never happens by accident. It is also one of the more seriously pet-toxic plants sold as a houseplant.

Quick facts

Water: Water every 10 days. Water thoroughly, then leave it until the pot is bone dry and the lower leaves have gone slightly soft. Never water into the rosette — water sitting in the centre rots it.
Light: Bright light with some direct sun.
Humidity: Indifferent; dry air is ideal.
Soil: Gritty cactus compost, at least half grit or perlite.
Feeding: A balanced feed monthly in spring and summer while in flower.
Repotting: Repot once a year.
Toxic to pets: Toxic to cats and dogs. Kalanchoes contain cardiac glycosides, which affect the heart — this is one of the more seriously toxic houseplants sold, and worth keeping out of reach.
Difficulty: Easy.
Mature size: 20–40 cm tall.
Native to: Madagascar.

Watering a Flaming Katy

Water every 10 days. Water thoroughly, then leave it until the pot is bone dry and the lower leaves have gone slightly soft. Never water into the rosette — water sitting in the centre rots it.

That cadence is the one PlantParlour sets for this species when you name it, and it is deliberately on the cautious side — a plant that asks a day early is safer than one that asks a day late. Log each watering and the reminder moves with the plant rather than with the calendar.

Light

As much direct sun as you can give it — four to six hours minimum. An echeveria in a normal room stretches into a pale tower within weeks, and no amount of later light will make it compact again.

Humidity and temperature

Indifferent; dry air is ideal. Central heating in winter is what turns a comfortable room into a dry one, and it is the usual reason an established plant suddenly browns at the edges or picks up spider mites.

Soil and potting

Cactus compost cut with more grit. A terracotta pot helps because it wicks water out of the mix and away from the roots.

Feeding

A balanced feed monthly in spring and summer while in flower. Stop feeding in autumn and start again when you see new growth in spring — feeding a plant that isn't growing just builds up salts in the pot.

Repotting

Repot once a year. After flowering. To get it to flower again it needs fourteen hours of complete darkness a night for six weeks — that, not care, is why supermarket kalanchoes never rebloom.

Common problems

Flowers once, then never again
Kalanchoes are short-day plants and need long nights to set buds.

Fix: Give it fourteen hours of total darkness a night for six weeks in autumn.
Stretched leggy growth
Not enough light.

Fix: Move it into direct sun and cut it back after flowering.
Mushy stem at the base
Overwatering.

Fix: Take healthy cuttings and start again.

Propagation

Twist a whole leaf cleanly off the stem, lay it on dry compost, and wait — roots and a tiny rosette form in a few weeks. Beheading a stretched plant and re-rooting the top also works.

A cutting taken in PlantParlour keeps its link to the plant it came from, so a propagation years later still traces back to the mother plant — which is the point if you ever sell or trade it.

Toxicity and safety

Toxic to cats and dogs. Kalanchoes contain cardiac glycosides, which affect the heart — this is one of the more seriously toxic houseplants sold, and worth keeping out of reach.

Questions people ask

How often should you water a Flaming Katy?

Water every 10 days as a starting point — that is the cadence PlantParlour sets for Kalanchoe blossfeldiana. Water thoroughly, then leave it until the pot is bone dry and the lower leaves have gone slightly soft. Never water into the rosette — water sitting in the centre rots it. Light, pot size and the time of year all move that number, so treat it as a reminder to go and check rather than a rule.

How much light does a Flaming Katy need?