Houseplant · Crassulaceae
Mother of Thousands
Kalanchoe daigremontiana
A forgiving succulent that grows its own babies along every leaf edge, and one to keep well away from pets.
Bright indirect
50–86°F · 10–30°C
USDA 9–11
12–35 in · 30–90 cm
Overview
Mother of thousands makes sense the moment you meet it, and it is a wonderful plant to start with. Along the scalloped rim of each leaf sits a neat row of little ready-made plantlets, every one already putting out roots. It hails from the dry southwest of Madagascar, so like most succulents it tucks water away in its plump, blue-green leaves and asks almost nothing of you in return.
As a houseplant it is genuinely hard to kill, and mistakes here are easy to forgive. Set it by a bright window in a gritty pot and it climbs steadily to an upright plant of 12 to 35 inches (30 to 90 cm). The one thing to watch is the very trait that makes it so charming, because those plantlets drop and root in any pot nearby, so it spreads fast and has naturalized in warm regions it was never meant to reach.
There is one honest caution that sets it apart from a gentle succulent like jade. Every part of it holds bufadienolides, cardiac glycosides that are toxic to pets and people alike. In a home without animals or small children it is a lovely, easy companion, and the safest place for it is simply somewhere they cannot reach.
Care
The short version: give it bright indirect light, a gritty fast-draining mix, and water only once the soil has dried out completely. Feed it lightly through the growing season, keep it warm, and pick off the plantlets before they wander into every pot.
Light
Set it where it gets bright indirect light and it stays compact and nicely colored. It handles a little partial sun happily, though a harsh afternoon blast can scorch the leaves, and a spot that is too dim will leave it pale and reaching.
Water
Water it the way a succulent likes. Soak the soil right through, then let it dry out completely before the next drink, and ease off even more through winter dormancy. Lingering moisture is the quickest route to root rot, and this plant is prone to it, so err on the dry side.
Soil
Pot it in a gritty cactus or succulent mix that drains in a heartbeat. Regular potting soil clings to far too much water around the roots, so a pot with a drainage hole matters every bit as much as the mix you choose.
Temperature
Keep it somewhere between 50°F to 86°F (10°C to 30°C), which happens to suit most rooms all year. It is not frost hardy, so if it has enjoyed a summer outdoors, bring it back in comfortably ahead of the first chill.
Humidity
Low humidity is exactly what makes it happy, so there is no target to fuss over and no need to mist. The ordinary dry air of most homes suits it far better than anywhere steamy.
Feeding
Feed it gently from spring through summer, roughly once a month, with a diluted balanced or cactus fertilizer. It thrives on very little, so a light hand is best, and you can skip feeding altogether through its winter rest.
Pruning
Pinch back any leggy stems to keep it looking tidy and snip away spent flower stalks. The one job that really pays off is taking the tiny plantlets off the leaf edges before they fall, or you will meet little seedlings in every pot nearby.
Repotting
Move it up a size every 2 to 3 years, or sooner once it fills its pot. Roots peeking through the drainage holes, the plant lifting out of its container, and water rushing straight through are all friendly signs it is ready.
Size & spacing
Indoors it grows to 12 to 35 inches (30 to 90 cm) tall with a spread of 12 to 24 inches (30 to 60 cm). Leave it a little breathing room so the plantlets it drops don't quietly root into whatever pot sits beside it.
Troubleshooting
Nearly everything that goes sideways here traces back to water or light, and every bit of it is fixable. Too much water rots the roots, too little light stretches it thin and pale. Find what you are seeing below, treat the cause rather than the symptom, and your plant will bounce right back.
Soft dark stems and drooping while the soil still feels wet
Wilting over damp soil points to root rot, and the usual cause is simply loving it with too much water in a mix that stays soggy. Don't panic, because it is recoverable. Gently lift the plant, trim off every soft brown root, settle it into a dry gritty mix, and leave watering alone until it perks back up.
Fix:
- Cut away all rotted tissue
- Repot into dry gritty succulent mix
- Withhold water until the plant recovers
White cottony tufts and a sticky film on the leaves
Those little white cottony clumps tucked into the leaf joints are mealybugs, and the sticky film is what they leave behind. It is a common visitor and easy to see off. Touch each one with a cotton swab dipped in isopropyl alcohol, then follow with insecticidal soap to reach any you missed, and give new plants a quiet spot on their own for a while before they meet the rest.
Fix:
- Wipe with isopropyl alcohol on a swab
- Treat with insecticidal soap
Dry brown patches showing up on the leaves
Strong afternoon sun can scorch the leaves and leave dry brown marks on the side that faces the glass, and the good news is the fix is easy. Nudge the plant back into bright indirect light and out of that fierce midday glare. If you would love it in a brighter window, just introduce it to direct sun slowly so it has time to settle in.
Fix:
- Move to bright indirect light
- Avoid the hot midday sun
Pale stretched growth with wide gaps between the leaves
If your plant looks leggy and pale, with leaves drifting far apart, it is only telling you it wants more light and is reaching to find it. New growth tipping toward the window confirms it. Give it a brighter home in bright indirect light and turn the pot every so often, and it will fill back in even and sturdy.
Fix:
- Move to a brighter spot with bright indirect light
- Rotate the pot periodically
Toxicity
It helps to think of this plant as toxic to every animal at home. All of it holds bufadienolides, cardiac glycosides that bring on drooling, vomiting, and diarrhea, and in any real amount can unsettle the heartbeat. No part of it is safe to eat and the sap can bother skin, so keep it comfortably out of reach of pets and small children.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Toxic
A cat that samples a leaf tends to drool and vomit, with loose stools following before long. The bigger concern is a larger mouthful, since the bufadienolides can unsettle the heartbeat, so keep curious cats away from it.
Dogs Toxic
Watch for a dog drooling heavily, being sick, and having diarrhea within a few hours of a chew. Because a good mouthful carries the same heart-rhythm risk, it is far safer to ring the vet than to wait and hope.
Horses Toxic
Horses take the cardiac glycosides badly. Drooling and a troubled gut come first, and a real dose can disturb the heartbeat enough to threaten a horse's life, so fence it well out of reach.
Rabbits Toxic
Please keep this one nowhere near a rabbit. The toxin upsets the stomach and strains the heart, and a small pet needs only a little to end up in real trouble.
Livestock Toxic
Cattle, goats, and sheep can be poisoned where the plant slips into pasture. Stomach upset comes first, and a larger amount moves on to dangerous effects on the heart, so keep grazing land clear of it.
Birds Toxic
Keep it fully out of a bird's reach. A bird is so small that even a nibble of leaf can hand over a meaningful dose of the heart-acting glycosides.
People Caution
No part of this plant is for eating, and the bufadienolides make even a taste unsafe. The sap can bother skin too, so slip on gloves when you handle it and keep it well away from little hands.
Sap can cause contact dermatitis; wear gloves when handling the plant or removing plantlets.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Beyond the species itself there is really just one variety worth knowing, a hybrid that carried the parent's spreading habit even further.
Kalanchoe × houghtonii
This hybrid of K. daigremontiana and K. delagoensis carries slimmer leaves, spreads even more freely than its parent, and has turned into a worldwide invader.
How to propagate
Making more of this plant will never be your challenge. If anything the trick is slowing it down, because it happily propagates itself whether you lend a hand or not.
Offsets & pupsEasy
Spring · 2-4 weeks
The plantlets around each leaf edge drop off with little roots already in place and settle wherever they land, taking hold within 2 to 4 weeks in spring. It really is as easy as propagation gets, which is the same reason the plant spreads so freely, so scoop up any you would rather not keep before they root.
Leaf cuttingsEasy
Spring to summer · 3-6 weeks
Rest a whole leaf on gritty mix in spring or summer and, over the next 3 to 6 weeks, tiny plantlets and roots appear along its edges. Keep the mix only barely damp, since too much water will rot the leaf before it ever gets going.
Myths
Mother of thousands must be safe around pets because it is such a common houseplant.
Being a familiar face on windowsills tells you nothing about whether it is safe. The ASPCA flags it as toxic to cats and dogs thanks to bufadienolides, cardiac glycosides that upset the stomach and can trouble the heartbeat. Keep it somewhere no animal in the house can reach it.
The little plantlets are harmless and will not spread.
Every tiny plantlet lands already carrying its own roots and settles in wherever it falls. That is precisely why the plant travels so quickly and naturalizes across warm regions, so it helps to gather up the fallen ones rather than let them root.