How do you care for string of pearls indoors, and why do its beads shrivel?
String of pearls is Curio rowleyanus, a species with spherical leaves along slender stems; older labels may say Senecio rowleyanus. Successful indoor care starts with strong filtered light reaching the top of the pot and an airy root environment. Shriveled beads alone do not prove that the plant is thirsty: a plant with rotting roots can look similar because it cannot take up water.
Identification, light and watering
1. The structure behind the trailing appearance This South African succulent has water-storing leaves, rather than ornamental fruits, for beads. In nature, stems can root at nodes touching the ground. Look at living stems on the pot surface as well as the long trailing strands. Long branches do not demonstrate healthy roots when the top has become bare and the stem bases have darkened. When buying a plant, several sound nodes and plump leaves provide a good starting point. 2. Judge light at the plant rather than the ceiling Choose a position near a bright window, protected from harsh midday sun. On a high hanging pot, curtains or a shelf may block light from the upper leaves; bright conditions around the dangling tips are not enough. Do not move a newly purchased plant straight into strong sun. Consider insufficient light when growth becomes long and sparse; with yellowish or scorched leaves, also assess any recent change in sun exposure. 3. Separate causes of shriveling by checking root moisture As well as feeling the surface, monitor pot weight and whether the lower part of the growing medium remains moist. Soft beads on a dry, light pot may indicate that watering is needed. If shriveling accompanies dark, soft stems in a heavy, wet pot, do not add more water. Water until water runs through the drainage holes, then let the pot drain completely. Keeping the root ball continuously wet is unsuitable, as is leaving it bone dry for a prolonged period.
Seasonal care, propagation and problems
4. Pot selection and seasonal changes Use a container with drainage holes, close to the size of the root system, and a free-draining succulent mix. An oversized pot can retain water that fine roots cannot use for a long time. With less winter light, the mix dries more slowly; do not automatically maintain summer watering intervals. Do not try to force new stems with fertilizer while growth has stopped. If repotting is necessary, move up only a little when active growth begins, avoiding unnecessary disturbance of the roots. Also check that water has not collected inside the decorative outer pot. 5. Propagation for a fuller crown Take a healthy stem section containing several nodes. Remove lower leaves only as needed and bring the nodes gently into contact with the mix; do not bury all the beads. Waiting for roots in a very wet environment increases the risk of rot. Newly rooted stems can replace an aging plant that has become sparse. Do not assume that one detached bead will necessarily produce a new plant; a stem section containing nodes is a more reliable starting material for propagation. 6. Pests and safety around the home Look for mealybugs particularly at nodes and around the pot rim; separate an affected plant and confirm the problem. Homemade oil or detergent mixtures can damage fleshy leaves. If a product is needed, follow the label for a treatment suitable for indoor ornamentals. Curio rowleyanus is harmful to people and pets if eaten. Keep trailing stems out of reach of children and animals, and collect fallen beads from the floor. Leave assessment of suspected ingestion to an appropriate professional.