String of Pearls Care Guide
Curio rowleyanus (formerly Senecio rowleyanus)
String of Pearls' trailing strands of round, bead-like leaves make it one of the more distinctive hanging succulents, and like most succulents its biggest risk comes from owners treating the pearls as ordinary foliage rather than the water-storage organs they actually are.
Light
String of Pearls wants bright light, including a few hours of direct sun, ideally morning or filtered sun rather than intense all-day exposure. A south or east-facing window with good light is ideal for a hanging position. In too little light, the pearls become elongated and stretched rather than staying round and plump, and the strands grow sparse with wide gaps rather than densely packed.
Because this plant hangs and cascades, rotating the pot periodically helps prevent one-sided, lopsided growth as the strands lean toward the light source.
Watering
The soil needs to dry out completely between waterings, which in the growing season typically means about every 2 weeks, stretching out further still in winter. The pearls themselves are modified leaves that store water, similar to how a cactus stores water in its stem — this gives the plant strong drought tolerance and, correspondingly, very low tolerance for consistently wet soil. Water thoroughly when you do water, then let the pot drain completely and wait until the soil is fully dry again.
Overwatering is the primary cause of this plant's problems, and it shows up distinctively: pearls that are overwatered often split or rupture, sometimes appearing to "pop" or crack along their surface, in addition to more general softening. Underwatered pearls, by contrast, shrivel and deflate while staying intact rather than splitting.
Soil and Potting
This plant is particularly unforgiving of slow-draining soil, so lean toward a gritty, fast-draining substrate marketed for cacti or succulents rather than a standard all-purpose mix, and blend in extra perlite if the bagged mix still looks dense. A terracotta hanging basket is ideal, since the porous material helps excess moisture evaporate and the hanging format suits the plant's natural trailing growth habit. Drainage holes are essential regardless of pot material.
Humidity and Temperature
Ordinary indoor humidity is never an issue for String of Pearls, and misting or a humidifier add nothing of value here. A comfortable indoor range of 50-85°F suits it well, and while it shrugs off an occasional cool night better than many succulents, a hard frost or sustained temperatures below roughly 45°F will damage or kill the strands.
Fertilizing
Fertilize sparingly — once in spring and once in early summer with a diluted succulent fertilizer, and nothing from September through March. This plant is adapted to nutrient-poor, fast-draining substrates in its native habitat and doesn't benefit from frequent feeding.
Propagation
String of Pearls propagates easily from stem cuttings. Snip a 4-6 inch strand, set it aside somewhere dry for a day or two so the cut tip forms a callus, then lay the strand flat across the surface of dry succulent soil (rather than burying it vertically) so several nodes along its length make contact with the soil. Roots form at these contact points within a couple of weeks, and the strand can be lightly covered with a thin layer of soil at the contact points to encourage rooting, though burying the pearls themselves risks rot. Skip watering entirely for roughly the first week so the freshly cut nodes aren't sitting in damp soil while they're still vulnerable to rot.
Pruning and Shape
Trimming leggy or bare strands encourages the plant to branch and fill in more densely from the cut point, and trimmed cuttings can be propagated directly rather than discarded. Over time, older strands near the base of the hanging mass naturally thin out even with good care, so periodic trimming and re-propagating fresh cuttings back into the same pot keeps a String of Pearls looking consistently full rather than sparse and aged at the crown. Many long-term growers treat this as an ongoing cycle, refreshing roughly a third of the strands each year to keep the planting consistently full and youthful-looking.
Common Mistakes and How to Read the Plant
Split or ruptured pearls with damp soil indicate overwatering — the pearls have taken on more water than their surface can hold and have physically split as a result. Let the soil dry out completely and reduce watering frequency going forward; already-split pearls won't heal but new growth should be normal once watering is corrected. Shriveled, deflated pearls with bone-dry soil indicate underwatering, resolved with a thorough soak — though check that the shrinkage isn't simply the plant's very slow, very gradual natural pearl turnover, which happens even in well-cared-for plants over time as older strands age.
When the pearls stop forming their round shape and instead grow sparse and elongated, that shape change signals the plant isn't getting enough light, and repositioning it somewhere brighter will fix the shape of new growth going forward (existing stretched strands stay that way). Yellowing or browning strands, particularly at the base of the hanging mass, are often simply the oldest growth aging and can be trimmed away to keep the plant looking full.
The sap causes gastrointestinal and skin irritation if chewed or handled roughly, so treat this as a plant to keep out of easy reach in households with pets or small children -- see the dedicated toxicity guide below for the full symptom list and what to do after an exposure.
Mealybugs occasionally establish among the densely packed pearls, where they're easy to miss against the plant's round, textured surface. Inspect the strands periodically, focusing on the base of the hanging mass where pearls cluster most densely, and dab any mealybugs directly with rubbing alcohol on a cotton swab -- a full spray-down risks leaving pooled moisture among the pearls, trading one problem for a worse one.
Because strands are so often propagated and passed between growers as cuttings, a newly acquired strand is worth a close look at the pearl bases before it goes near an established planting -- mealybugs travel well hidden on cuttings that otherwise look completely healthy, and a few days of isolation for any new strand catches most hitchhiking infestations before they spread through the rest of the hanging basket.