Identity & taxonomy
- Scientific name
- Ceropegia woodii Schltr.
- Family
- Apocynaceae
- Genus
- Ceropegia
- Order
- Gentianales
- Wikidata
- Q1055516
- Ceropegia linearis subsp. woodii (Schltr.) H.Huber
- String of heartsen
- Rosary vineen
- Chain of heartsen
- Hearts entangleden
- Sweetheart vineen
- Hjärtrankasv
- Kjærlighetsplanteno
- Hjerterankeda
- Sydänköynnösfi
- Leuchterblumede
South Africa (KwaZulu-Natal, Eastern Cape) · Eswatini (Swaziland) · Zimbabwe
How to identify it
Growth habit. Trailing tuberous vine arising from a central potato-like tuber that can reach 5–8 cm across with age. Stems are thin, purplish-green, and trailing to 4 m or more. Aerial 'bead' tubers form at nodes along mature stems — these are small storage organs that also root readily when they touch soil, making propagation almost inevitable wherever a stem rests on dirt. Not a true succulent but possesses succulent-like water storage in the leaves, tubers, and thick underground caudex.
Leaves. Opposite, heart-shaped (cordate) paired leaves 1–2 cm across, spaced 3–5 cm apart along thin stems. Dark green with bold silver or pale-green marbling on the upper surface and purple undersides. Leaves are slightly succulent (2–3 mm thick) and store enough water for the plant to go weeks without irrigation.
Flowers. Remarkable tubular flowers 2–3 cm long in pink-to-mauve with a pouched base and a five-pointed star-shaped top that forms a 'lantern'. Produced sporadically through the warm months on mature plants in good light. Pollinated in nature by small flies drawn into the tubular corolla by a faint carrion-mimicking scent; the flies are briefly trapped inside, pick up pollen, and are released as the flower ages.
- Heart-shaped paired leaves with silver marbling on a green-purple background — diagnostic.
- Thin purple-green trailing stems that can reach 4+ m over a year.
- Small bead-like aerial tubers at nodes along mature stems.
- Central underground tuber that develops into a ball 5–8 cm across over years.
Commonly confused with
String of pearls
Round pea-shaped leaves rather than heart-shaped; the classic shelf-trailer silhouette but in a completely different family (Asteraceae). Requires much brighter light and more careful watering.
String of bananas
Curved banana-shaped succulent leaves on trailing stems. Same Asteraceae family as string of pearls; different genus from Ceropegia.
String of nickels
Small coin-shaped succulent leaves in pairs along a trailing vine; same Apocynaceae family as Ceropegia, similar ecology, different leaf shape.
Tiny leaf porcelain flower
Small, mottled-green-and-silver heart-shaped leaves with a similar visual pattern, but on a twining vine that climbs rather than purely trails. Flowers are umbels of many small stars, not lantern-shaped.
Care
Light
Bright indirect with some direct sun — silver marbling intensifies with light.
Ceropegia woodii is a sun-loving vine on its native South African rocky slopes. Indoors, place directly beside a south or west window, or let the vine drape from a hanging basket near a bright east window. The silver marbling on the leaves brightens with strong light and fades in shade; variegated cultivars hold their pink tones only in very bright indirect light. Leaves in deep shade become dark green, flat, and widely spaced (leggy).
Seasonal: Nordic winters above ~55°N: a full-spectrum LED at 12,000+ lux for 10–12 hours/day from October to March prevents winter etiolation and keeps the silver pattern vivid.
Water
When top 3–4 cm of soil is dry.
Water thoroughly until runoff, then empty the saucer. The central tuber and succulent leaves store weeks of water; the plant punishes overwatering with stem rot but shrugs off deep drying. Wrinkled leaves mean it's thirsty; mushy leaves mean rot. A bright plant in summer drinks every 10–14 days; a winter plant in cool conditions may go 4–6 weeks.
Seasonal: Reduce to once every 4–6 weeks from November to February.
Soil
Gritty, well-draining succulent mix.
A blend of 2 parts commercial cactus/succulent soil, 1 part perlite, and 1 part coarse grit works well. The mix must drain quickly — a dense peat-heavy mix holds water around the tuber and causes rot. Terracotta pots accelerate drying and reduce rot risk.
Humidity
Any — tolerates dry indoor air.
Ceropegia woodii is a summer-dry southern African species and is entirely tolerant of Nordic winter indoor humidity (20–30 %). No humidifier needed.
Temperature
13–27 °C in active growth.
Prefers warm rooms. Below 10 °C, growth stops; below 7 °C, leaves drop. A brief cool rest at 10–12 °C in winter with reduced watering is not essential but does trigger flowering in some plants. Keep away from cold window glass and drafts in winter.
Fertilizer
Dilute balanced feed 2–3 times per year in spring and summer.
A balanced NPK (e.g. 10-10-10) at quarter the label rate in spring, midsummer, and early autumn is ample. Ceropegia is a light feeder; over-fertilising produces weaker, more overwatering-sensitive growth.
Seasonal: Never feed during the cooler winter months.
Pruning
Trim long vines to keep shape; use cuttings to propagate.
Vines can be cut back at any node to keep the plant tidy or to encourage branching from lower in the pot. Cut pieces root readily as cuttings or by simply laying them on damp soil; every node is a potential new plant. Remove any dead or dried-up stems at the base.
Repotting
Every 3–4 years; prefers to be snug in its pot.
Move up by only one pot size — Ceropegia dislikes excess soil around the tuber. Repot in spring. When repotting, gently tease out any aerial 'bead' tubers that can be tucked back onto the soil surface to root and thicken the plant.
Stem cutting (water or soil)
easy~2–4 weeksCut a 10–15 cm section of vine with several leaf pairs. Strip the bottom few leaves and either place the cut end in room-temperature water or insert into damp gritty mix. Roots emerge from every stripped node within 2–4 weeks. A single parent plant can be multiplied dozens of times per season.
Bead tuber / aerial tuber
easy~3–6 weeksDetach a bead tuber from a mature stem and press it half-buried onto damp gritty mix. Roots and a new vine emerge from the bead in 3–6 weeks. This is the propagation method the plant itself uses in nature.
Layering
easy~4–6 weeksPin a stem onto damp mix in a second pot while still attached to the parent; the pinned node will root. Once rooted, sever from the parent. Useful for keeping track of stock-plant identity during bulk propagation.
Cultivars
'Variegata'
Pink and cream variegation on the green-marbled leaves; stems often pink-tinged. Slower-growing than the species and more light-demanding to hold colour.
'Silver Glory'
Broader, more rounded leaves with near-white silver marbling and less visible green. Named sport from tissue culture.
'Durban'
Solid dark green leaves without the silver marbling of the species. Less common; grown for a simpler look.
Common problems
Leggy vines with widely spaced leaves
Symptom
Long stretches of bare vine between leaf pairs; leaves smaller and paler than usual.
Cause
Insufficient light — the plant stretches toward whatever light it has.
Fix
Move to a brighter spot with some direct sun. Cut leggy stems back to a full-leafed section and use the cuttings to fill out the pot — Ceropegia responds quickly to being 'restarted' in better light. Pre-existing leggy stems will not regain compact spacing.
Mushy stems near the soil
Symptom
Stems blacken or collapse at the soil line; leaves yellow and fall along the affected stem.
Cause
Overwatering, poor drainage, or a pot without drainage holes.
Fix
Remove all mushy stem tissue. Take tip cuttings from any firm sections of vine and root them separately — the parent tuber may or may not recover. Repot the survivor in fresh gritty mix and reduce watering frequency sharply.
Shrivelled leaves
Symptom
Leaves show fine wrinkles and lose plumpness.
Cause
Underwatering — or, paradoxically, root / tuber rot that prevents water uptake.
Fix
Water thoroughly; plumpness returns within 48 hours if roots and tuber are healthy. If leaves stay shrivelled after watering, unpot and inspect — a soft mushy tuber means rot, and the plant needs drastic intervention (cut and propagate firm stem sections).
Won't flower
Symptom
Healthy vigorous plant but no flowers.
Cause
Insufficient light (most common), young plant, or no cool winter rest.
Fix
Move to a sunnier spot. A mature plant (2+ years) in a bright window with a brief cool, dry winter rest at 10–13 °C usually produces flowers the following summer. Indoor plants in consistently warm conditions often never bloom — the plant is grown for foliage in most collections.
- Mealybugs (especially in leaf axils)
- Aphids (on new growth)
- Scale
- Stem rot from overwatering
- Root / tuber rot (Pythium, Phytophthora)
- Powdery mildew
Toxicity & safety
No documented toxicity. The milky sap from cut stems is typical of Apocynaceae and can cause mild skin irritation in sensitive individuals; wash hands after pruning.
Ceropegia woodii — Missouri Botanical Garden Plant FinderNot listed on ASPCA's toxic plant database. Ingestion may cause mild GI upset in sensitive animals but no systemic toxicity is recorded.
ASPCA Toxic and Non-Toxic Plants — Ceropegia not listed as toxicNot listed on ASPCA's toxic plant database. Mild GI upset possible with any non-food plant ingestion but no systemic effects are recorded.
ASPCA Toxic and Non-Toxic Plants — Ceropegia not listed as toxicCeropegia flowers are fly traps. The tubular corolla ends in a five-pointed star-shaped top with inward-pointing hairs that prevent pollinator flies from escaping for several hours; during captivity, the fly is dusted with pollen. The hairs then wilt and release the fly to visit the next flower. The faint carrion scent that attracts flies is the reason Ceropegia is sometimes called the 'parachute flower' or 'lantern flower' — a similar mechanism operates across the entire genus's ~200 species.
Frequently asked · 5
Is string of hearts safe for cats and dogs?+
Yes — Ceropegia woodii is not listed on ASPCA's toxic plant database and is considered safe for pet households. The milky latex from cut stems (typical of the Apocynaceae family) can cause mild skin or GI irritation in sensitive animals, but no systemic toxicity is recorded. It's a reliable trailer for homes with cats and dogs.
How do I propagate string of hearts?+
Trivially — every node on a vine can root. Cut a 10–15 cm piece with several leaf pairs, strip the bottom few leaves, and either place the cut end in room-temperature water or insert into damp gritty mix. Roots emerge in 2–4 weeks. Alternatively, pin a stem onto damp soil in a second pot while still attached to the parent, or detach a bead tuber from a mature stem and press it half-buried onto damp mix. Ceropegia is one of the easiest plants in existence to multiply.
Why is my string of hearts leggy with bare vines?+
Insufficient light — the plant stretches toward whatever light is available, producing long stretches of bare stem between leaf pairs. Move to a brighter spot with some direct sun, and cut leggy stems back to a full-leafed section. Use the cuttings to fill out the pot. Pre-existing leggy sections won't recompact but new growth emerges with tight leaf spacing in better light.
What are the little bead-like growths on my string of hearts?+
Aerial tubers — a natural clonal propagation strategy. Ceropegia woodii forms small storage tubers at nodes along mature stems; each one can detach and root where it lands, producing a new plant. You can speed the process by pressing beads half-buried onto damp gritty mix in a second pot. This is actually the propagation method the plant uses in nature.
How often should I water string of hearts?+
When the top 3–4 cm of soil is dry — typically every 10–14 days in summer in a bright window and every 4–6 weeks in winter. The central tuber and succulent leaves store weeks of water; the plant tolerates drought far better than soggy soil. Wrinkled leaves mean it's thirsty; mushy stems mean root rot is already underway.