Curio herreanus, commonly known as String of Tears, is a popular succulent houseplant recognized for its unique, tear-drop shaped leaves that cascade gracefully from its stems. Native to the arid regions of South Africa, this plant has adapted to store water in its plump foliage, making it drought-tolerant and relatively low-maintenance. Its distinctive appearance and resilience contribute to its widespread appeal among plant enthusiasts.
Essential Care for String of Tears
Light Requirements
String of Tears thrives in bright, indirect light, mimicking its natural habitat where it receives ample sunlight without harsh, direct exposure. An east or south-facing window indoors provides suitable light conditions. Insufficient light can cause the plant to become “leggy,” stretching its stems with sparse foliage. Conversely, too much direct sunlight, especially the intense afternoon sun, can scorch the delicate leaves, leading to discolored or crispy patches.
Watering Practices
The “soak and dry” method is used for String of Tears; allow the soil to dry out completely between waterings to prevent root rot. Check soil moisture by inserting a finger two to three inches into the soil or lifting the pot. Shriveled leaves indicate underwatering, while mushy stems and yellowing leaves signal overwatering. During spring and summer, watering may be more frequent, every two to three weeks indoors, depending on environmental conditions. In the dormant months of fall and winter, reduce watering significantly, to once a month.
Soil Preferences
String of Tears requires well-draining soil to prevent waterlogging and root rot. A specialized succulent or cactus potting mix is recommended due to its excellent drainage properties. For those preferring to mix their own, a combination of 50% regular potting soil, 25% coarse sand, and 25% perlite or pumice provides an effective blend. Ensuring the pot has drainage holes is important to allow excess water to escape.
Temperature and Humidity Needs
This succulent prefers average room temperatures, between 65°F and 80°F. It is not frost-tolerant and should be protected from temperatures below 40°F, which can cause significant damage. String of Tears tolerates typical indoor humidity levels and does not require high humidity. While it can withstand moderate humidity, excessive moisture combined with poor air circulation can cause problems.
Fertilization Guidelines
String of Tears is not a heavy feeder, so fertilize sparingly. During its active growing period in spring and summer, a diluted liquid fertilizer can be applied every four to six weeks to support healthy growth. Dilute the fertilizer to about quarter strength of the recommended dose to avoid over-fertilization. Cease all fertilization during the fall and winter months when the plant enters dormancy.
Propagating String of Tears
Propagating String of Tears is best done using stem cuttings. The best time for propagation is during the growing season, in spring or early summer. Begin by selecting a healthy vine and snipping a section about 4 to 6 inches long using clean, sharp scissors. Remove the leaves from the bottom inch or two of the cutting to expose bare stem, then allow the cut end to “callus” for a day or two. This callusing process helps prevent rot once the cutting is introduced to moisture.
Cuttings can be rooted in either water or soil. For water propagation, place the calloused cutting in a glass of clean water, ensuring only the bare stem is submerged and leaves remain above the waterline. Once roots develop to about an inch long, the cutting can be transplanted into a succulent soil mix. For direct soil propagation, plant the calloused stem end directly into moist succulent soil. Keep the soil lightly moist until roots form, which takes two to four weeks.
Troubleshooting Common String of Tears Problems
Shriveled or deflated leaves point to underwatering. Providing a thorough watering, allowing excess water to drain, resolves this. Mushy, yellowing leaves or stems indicate overwatering and potential root rot. Immediately reduce watering frequency and ensure the soil dries out completely between waterings. If root rot is advanced, repotting into fresh, dry soil after trimming affected roots is necessary.
Leggy growth, characterized by elongated stems with widely spaced leaves, signals insufficient light. The plant stretches to reach a light source. Moving the plant to a brighter location with indirect light can prevent further legginess. Pruning back the stretched stems encourages bushier new growth.
Pest infestations can occur. Mealybugs and spider mites are common. Small white, cottony masses suggest mealybugs, while fine webbing and tiny dots on leaves indicate spider mites. Address pests by isolating the plant and treating with insecticidal soap or neem oil. A lack of new growth may mean the plant is dormant or not receiving adequate light or nutrients during its growing season.