Houseplant · Apocynaceae
String of Hearts
Ceropegia woodii
Offer it bright light and a proper dry-out between drinks, and those little hearts will trail happily for years.
Bright indirect
59–86°F · 15–30°C
USDA 10–12
3–12 ft · 0.9–3.7 m
Overview
String of hearts hails from southern Africa, where it threads its way across rocky ground as a tuberous vine. Pairs of little heart-shaped leaves ride along its fine stems, each one marbled silver across a deeper green, and that sweet shape earned it names like rosary vine, chain of hearts, and sweetheart vine. Set indoors, it loves to cascade from a tall shelf or a hanging basket, the trailing strands lengthening to several feet as time passes. That length builds slowly, so there is no rush and nothing to fear.
Its reputation for being easygoing is well deserved, and here is the comforting part. Because it keeps water tucked inside its leaves and stems, a forgotten watering barely troubles it, while a constantly wet pot is the thing it cannot abide. Hand it a bright corner and a gritty, quick-draining mix and it will mostly tend to itself, filling out with fresh length all through spring and summer. In other words, benign neglect suits it beautifully.
Really, it asks for only two kindnesses: bright indirect light and a good dry spell between drinks. Give it too little light and the strands grow pale and leggy; give it too much water and the roots give way. Manage that gentle pair and you are rewarded with a long-lived, forgiving companion that is wonderfully easy to turn into many more. You are more than capable of getting this right.
Care
The short version: offer bright indirect light, a free-draining cactus or succulent mix, and a drink only after the soil has gone completely dry, easing back even more as winter dormancy settles in.
Light
Set it where it can drink up plenty of bright indirect light, as bright as you can manage short of scorching noon sun. A west- or south-facing window makes it very happy, because that good light keeps the strands tight and the little hearts richly marbled. Tucked in a dim corner, it tends to grow pale and leggy instead.
Water
This is the single most important habit to get right, and happily it is an easy one. Wait until the soil has dried out completely, then give it a thorough soak, since the plant carries its own water supply and will rot if left sitting wet. As winter dormancy arrives it hardly drinks at all, so pull back even more then.
Soil
Pot it up in a free-draining cactus or succulent mix, and stirring in some coarse sand or perlite helps water drain straight through. It is relaxed about acidity, happy anywhere from 6.0 to 8.0, so good drainage counts for much more than the exact pH.
Temperature
Everyday room warmth is just right, anywhere from 59°F to 86°F (15°C to 30°C). Try to keep it above 60°F (16°C) over winter and clear of chilly drafts, since frost is one thing it simply cannot survive.
Humidity
The regular air in your home suits it perfectly, and low humidity poses no problem at all for a semi-succulent like this one. You can skip the misting bottle entirely and never fuss over a humidity reading.
Feeding
Through the spring and summer growing months, offer a gentle meal of half-strength balanced houseplant fertilizer, and once a month is plenty. When winter comes and the plant settles into rest, set the fertilizer aside completely.
Pruning
Snip back any strands that have grown too long or bare, and the plant answers with fuller, bushier growth. Never toss those trimmings, because each cut piece roots with ease into a brand new plant for you.
Repotting
This one genuinely enjoys snug quarters, so repot only when it truly needs it. The gentle hints to watch for are roots crowding the whole pot, soil that dries almost the moment you water, and growth that has quietly stalled.
Size & spacing
35–144 in (90–365 cm) tall
Troubleshooting
Nearly every problem with this plant comes down to one of two simple things: too little light or too much water. Once you learn to read the vines and feel the soil, you can catch either one long before it does harm. Find your symptom below and step in gently but soon.
Yellowing leaves and soft, mushy stems down near the soil
Yellowing leaves paired with soft, mushy stems point to root rot from overwatering, the one slip that can undo this plant. When the mix stays soggy, the lower stems go squishy and the roots turn brown and soft. Set the watering can down, let everything dry out fully, and move the plant into a free-draining cactus or succulent mix, trimming away any rotted bits as you go. If the rot has spread, take a few healthy cuttings or tubers as a safety net, and you can still start over.
Fix:
- Stop watering and allow the mix to dry out completely
- Repot into a free-draining cactus/succulent mix and remove rotted tissue
- Take healthy stem cuttings or tubers as backup if rot is advanced
Sticky film, distorted growth, or little bugs on the strands
A sticky film or twisted new growth usually means aphids, mealybugs, or scale have moved in for a feed. Look for white cottony fluff, tiny raised bumps, or little clusters of soft-bodied insects along the stems and the undersides of the leaves. Dab them away with a cotton swab dipped in isopropyl alcohol, follow with insecticidal soap, and keep this plant apart from the others until it is fully in the clear.
Fix:
- Wipe off pests with a cloth or cotton swab dipped in isopropyl alcohol
- Treat with insecticidal soap as needed
- Isolate the plant to prevent spread
Stretched, bare strands with wide spaces between the hearts
When the vines run long and gappy, the cause is nearly always too little light. The hearts come in pale rather than nicely marbled, and the stems stretch on with not much filling them out. Move your plant to a brighter window with bright indirect light, then trim those leggy strands so fresh, denser growth can come in. Nothing here is permanent, so take heart.
Fix:
- Move to a brighter spot with bright indirect light, such as a west- or south-facing window
- Trim leggy growth to encourage denser branching
Toxicity
Here is some reassurance for anyone with pets or little ones underfoot: string of hearts is broadly considered non-toxic and gentle to have around cats, dogs, and everyone else at home. Its milky sap might leave tender skin feeling slightly itchy, so give your hands a wash after taking cuttings, and a stray curious nibble is nothing to lose sleep over.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Since string of hearts is considered non-toxic, a curious cat that samples a heart or two will be just fine. Any houseplant eaten in quantity can bring on a bit of drooling or a passing tummy upset, but there is nothing here to alarm you.
Dogs None
Your dog can happily coexist indoors alongside these hanging strands. It holds no known toxin for them, though a good chew on the stems might stir up mild, short-lived stomach upset, the way any plant that isn't food can.
Horses None
Horses have nothing to fear from this plant. It is a compact houseplant they would rarely encounter, and there is nothing inside it that could do them harm.
Rabbits None
Rabbits are perfectly safe near string of hearts. The leaves are not poisonous, so a stray bite will not hurt them, though keeping the strands out of reach spares the plant.
Livestock None
Grazing animals are in no danger from this plant, which lives indoors in a pot well away from any field. There is nothing toxic in it for them.
Birds None
Pet birds can perch and peck around this vine with no worry, since it holds no toxin known to trouble them. The odd nibbled leaf is nothing to fret about.
People None
String of hearts poses no real threat to people. The milky sap can leave sensitive skin a little itchy, so rinse your hands after taking cuttings, and it is simply not something to eat.
As with any houseplant, discourage pets and children from chewing the foliage, and the milky sap of Apocynaceae plants may cause mild irritation in some individuals.
Varieties
The plain species is what most growers keep, though there is one named variety you will bump into often enough to recognize.
Ceropegia woodii 'Variegata'
This is a variegated form washed in pink, cream, and green, and it takes its time, growing more slowly than the plain species.
How to propagate
Hardly any houseplant shares itself as freely as this one does. Each trailing vine is a little factory of new plants, whether you snip a cutting, settle a single bead into soil, or layer a stem while it still holds onto the parent.
Stem cuttingsEasy
Active growing season (spring to summer) · A few weeks to root, especially with bottom heat
Stem cuttings are the friendliest place to start. Snip a few in the active growing season through spring and summer, settle them into a free-draining mix, and roots appear within a few weeks. A little bottom heat underneath hurries things along nicely.
Offsets & pupsEasy
Active growing season · A few weeks once in contact with soil
Look closely and you will find small aerial tubers along the vines, the little bead-like tubercles that earned the rosary vine its name. Press one gently onto the soil during the growing season and it roots all by itself, raising a new plant within a few weeks.
LayeringEasy
Active growing season · A few weeks
Layering lets you avoid cutting anything at first. While a trailing stem is still joined to the parent, pin it down so its tubercles rest against the soil, give it a few weeks of active growth to root, then snip the young plant loose.
Myths
String of hearts has to be watered often to stay lush, the same as any leafy houseplant.
In truth this is a drought-tolerant semi-succulent rather than a thirsty leafy thing, and it genuinely prefers to dry out completely between drinks. Overwatering is what does it in, rotting the roots past any rescue. Once winter dormancy arrives and growth pauses, ease back on water even more.