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Mother of Thousands: Care, and Containing the Plantlets

A succulent that drops hundreds of rooting babies from its leaf edges. How to grow it, why it is toxic and invasive, and how to stop it spreading.

By Zakaria 4 min read Save to Pinterest — opens Pinterest in a new tab
Dozens of tiny mother of thousands plantlets rooted across the surface of a pot below the parent plant
Photo: WisdomIsBliss, CC BY-SA 3.0, via Wikimedia Commons
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A succulent that clones itself along every leaf edge and drops the results into whatever pot is nearest. Easy to grow, hard to get rid of, and toxic enough to matter around pets.

The two plants people mean

Mother of thousands and mother of millions
Mother of thousandsMother of millions
SpeciesK. daigremontianaK. delagoensis
LeavesBroad, triangular, scallopedNarrow, tubular, pencil-like
PlantletsRinging the whole leaf edgeOnly at the leaf tips
Toxic?YesYes
Invasive?Yes, in warm climatesYes, often worse

Care and cautions are the same for both, and hybrids between them are sold under either name. Both are sometimes listed under Bryophyllum rather than Kalanchoe.

Growing it

What it wants
LightBright, with a few hours of direct sun. Stretches without it
SoilGritty cactus mix. Ordinary compost holds too much water
WaterOnly when dried right through — every 2–3 weeks in summer, rarely in winter
FeedAlmost none. A weak cactus feed once or twice in summer
Temperature60–80°F. Hardy only to about 40°F
PotTerracotta with drainage. It dries faster, which suits the plant

This is a plant that thrives on being left alone. Over-watering is the only common way to kill one — the stem goes soft and brown at the base and the whole thing collapses.

A leggy plant is not a lost plant

Stretched, gappy growth means it has been too dark, and that stretch is permanent. But the fix is easy: move it into brighter light, then cut the stem back hard. It reshoots from the cut within weeks, and the piece you removed roots as a cutting in gritty compost.

The plantlets

Each scalloped notch along the leaf edge produces a complete miniature plant — leaves, and often aerial roots — while still attached to the parent. They detach at a touch, and any that lands on damp compost roots within days.

This is genuinely impressive and genuinely a nuisance. A single mature plant sheds hundreds over a season.

Containing them:

  • Stand the pot on a saucer or tray, never directly on soil, gravel or a propagation bench
  • Keep it away from other pots — neighbouring compost is the usual escape route
  • Sweep or vacuum around it periodically
  • Pinch off leaves heavily loaded with plantlets before they drop
  • Bin the trimmings. Do not compost them in a frost-free climate

Never plant it in the ground in a warm climate

Kalanchoe daigremontiana and K. delagoensis are declared weeds in parts of Australia and serious invasives in Florida, Hawaii and other frost-free regions, where they form dense colonies and poison grazing livestock.

Where winters freeze, it cannot survive outdoors and is a harmless houseplant. Where they do not, it belongs in a pot on a hard surface — or not at all.

Toxicity

Every part contains bufadienolides — cardiac glycosides that act on the heart — and the plantlets carry the highest concentration.

  • Toxic to cats, dogs and horses (ASPCA), and to cattle, where poisoning is well documented
  • Symptoms: drooling, vomiting, lethargy, and in serious cases an abnormal heart rhythm
  • Call a vet rather than waiting it out if a pet has chewed one

The practical problem is not the plant on the shelf — it is the shed plantlets on the floor, which are the most toxic part and the hardest to keep picked up. If you have a cat that chews plants, this is one to skip.

Propagating, if you want more

You will not need to try. But deliberately:

  1. Take a detached plantlet, or pinch one off a leaf edge
  2. Sit it on the surface of damp gritty compost. Do not bury it
  3. Keep it lightly moist and bright
  4. Roots in days, a recognisable plant in weeks

Stem and leaf cuttings work as well, and a cut stem on the parent reshoots. Nothing about this plant is difficult to increase.

Flowering

A mature plant — usually several years old — sends up a tall stalk of drooping pinkish-orange bell flowers, most often in winter.

That flowering stem then dies back, which is normal for the species rather than a failure. By then it has produced hundreds of plantlets, so the plant has already replaced itself several times over.

Problems

  • Soft brown stem base — over-watering. The commonest killer
  • Stretched, gappy growth — too little light
  • Wrinkled, curling leaves — genuinely thirsty, which takes a while
  • White cottony clumps — mealybugs, the usual pest on Kalanchoe
  • Plantlets everywhere — normal. Manage it rather than fight it

Common questions

How do you care for a mother of thousands plant?

Treat it as a succulent and then mostly ignore it. It wants bright light with a few hours of direct sun, a gritty free-draining cactus mix, and watering only once the mix has dried right through — every two to three weeks in summer and far less in winter. Normal room temperature suits it and it needs almost no feeding. It is hardy only to about 40°F, so it goes indoors before frost. The plant is far more likely to die from over-watering than from neglect.

What is the difference between mother of thousands and mother of millions?

Leaf shape, mainly. Mother of thousands, Kalanchoe daigremontiana, has broad triangular leaves with plantlets ringing the whole scalloped edge. Mother of millions, Kalanchoe delagoensis, has narrow tubular pencil-like leaves carrying plantlets only at the tips. Both are Madagascan, both reproduce the same alarming way, both are toxic, and both are invasive in warm climates — so for practical purposes the care and the cautions are identical.

Is mother of thousands toxic to cats and dogs?

Yes, and seriously so. Every part contains bufadienolides, cardiac glycosides that affect the heart, and the plantlets are the most concentrated. Poisonings in cattle are well documented and the ASPCA lists Kalanchoe as toxic to cats, dogs and horses. Symptoms run from drooling and vomiting to an abnormal heart rhythm. It is not a plant for a household with a cat that chews, and the constantly shed plantlets make it much harder to keep out of reach than an ordinary houseplant.

How do I stop mother of thousands from spreading?

Catch the plantlets before they land. Stand the pot on a saucer or tray rather than directly on soil or gravel, sweep or vacuum around it regularly, and pinch off leaves that are heavy with plantlets before they drop. Any plantlet that touches damp compost roots within days, so neighbouring pots are the usual route of escape. Never plant it in the ground or compost the trimmings in a frost-free climate — it is a declared weed in parts of Australia, Florida and Hawaii.

Why is my mother of thousands leggy and stretched?

Not enough light. In dim conditions the stem elongates, the gaps between leaves widen and the plant leans toward the window, and that stretch never reverses. Move it somewhere brighter — a spot with a few hours of direct sun — and then cut the stem back. It reshoots readily from the cut, and the removed top can be rooted as a cutting, so a leggy plant is easy to renew rather than replace.

Does mother of thousands flower?

Yes, though not often indoors and usually only on a plant several years old. It sends up a tall stalk of drooping bell-shaped flowers in pinkish orange, typically in winter. The flowering is also the end of that stem: like many Kalanchoe it is monocarpic in habit, so the flowered stem dies back afterwards. Since the plant has by then produced hundreds of plantlets, it effectively replaces itself without any effort on your part.

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