The Senecio peregrinus, commonly known as String of Dolphins, is a unique succulent celebrated for its distinctive foliage that resembles miniature leaping dolphins. This charming appearance makes it a popular choice for hanging baskets or as a trailing plant on shelves, where its cascading vines can be fully appreciated. Its succulent nature allows it to store water, making it relatively low-maintenance for plant enthusiasts.
String of Dolphins Care
Light
String of Dolphins thrives in bright, indirect sunlight. Placing the plant near a south-facing window provides necessary light, but direct, harsh sun can scorch its delicate leaves, causing yellowing or browning. Insufficient light leads to leggy growth, where stems elongate with sparse foliage. If natural light is limited, supplemental LED grow lights can ensure adequate light.
Watering
Proper watering is essential for this succulent. The “soak and dry” method is recommended: water thoroughly until water drains from the pot, then allow the soil to dry completely before the next watering. Overwatering is a common issue that can lead to root rot, causing leaves to become mushy, squishy, or yellow. During the active growing season (spring to early fall), water about once per week. Reduce watering to approximately once a month in winter dormancy.
Soil Requirements
Well-draining soil is crucial for the String of Dolphins to prevent waterlogging and root rot. A commercial succulent or cactus mix is suitable, or a custom blend can be made by combining two parts potting soil with one part perlite or pumice and one part sand. This mix ensures good drainage and aeration. A pot with drainage holes is also important to allow excess water to escape.
Temperature and Humidity
String of Dolphins tolerates average household temperatures, ideally between 60°F and 75°F (15°C and 24°C). While not frost-tolerant, they can withstand cooler winter temperatures, as low as 40°F (4°C). The plant does well in moderate household humidity and does not require misting. Maintaining good airflow around the plant can be beneficial.
Fertilizing
String of Dolphins does not require frequent fertilization. Over-fertilizing can cause the leaves to lose their distinctive dolphin shape. A light feeding with a diluted organic fertilizer (e.g., worm compost, liquid kelp, or fish emulsion) once in early spring can boost growth and encourage blooming. Fertilizing during summer is not recommended as it can make the soil too hot and harm the roots.
Propagating String of Dolphins
Propagating String of Dolphins is straightforward, primarily done through stem cuttings. Select a healthy stem at least 4-5 inches long, ensuring it has a few “dolphin” leaves. Remove the leaves from the bottom inch or two of the cutting to expose the stem nodes, where new roots will emerge. Allow the cut end to callus, or dry, for two to three days; this step helps prevent rot when planted.
Once callused, the cuttings can be rooted in either water or well-draining soil. For water propagation, place the prepared cutting in a glass of water, ensuring only the bare stem is submerged, and change the water every few days. Roots appear within one to two weeks. For soil propagation, insert the callused end into a moist succulent potting mix. Keep the soil lightly moist until roots develop, which can take a few weeks. Once rooted, care for the new plants as you would a mature String of Dolphins.
Common Problems and Solutions
Shriveling or Wrinkling Dolphins
Shriveling or wrinkling of the “dolphin” leaves often indicates underwatering. If the soil is dry and the leaves appear deflated, the plant needs a thorough watering. Shriveling can also occur from root issues, a symptom of previous overwatering leading to root damage.
Yellowing or Mushy Dolphins
Yellowing, squishy, or transparent leaves signal overwatering and root rot. This occurs when the plant sits in excessively wet soil, decaying its roots. To remedy this, allow the soil to dry out completely between waterings, and ensure the pot has adequate drainage.
Leggy Growth or Lack of “Dolphin” Shape
If your String of Dolphins exhibits stretched-out stems with significant gaps between leaves, it is not receiving enough light. The plant elongates its stems to reach brighter conditions. Moving the plant to a location with more bright, indirect light or supplementing with a grow light promotes more compact, bushy growth and maintains the distinct dolphin shape.
Pests
Common houseplant pests like mealybugs, aphids, scale, and spider mites can affect String of Dolphins. These sap-sucking insects can cause damage if left untreated. Early detection is important; inspect your plant regularly. Treatment includes using cotton swabs dipped in rubbing alcohol for mealybugs, or applying insecticidal soap or neem oil for other pests. Ensuring good air circulation also deters pests.