String of Dolphins Care: How To Grow This Charming Succulent Indoors or Out

The String of Dolphins (Senecio peregrinus) is a whimsical succulent prized for its unique, dolphin-shaped leaves that cascade like a pod leaping through the air. A hybrid of Senecio rowleyanus (String of Pearls) and Senecio articulatus (Candle Plant), this eye-catching trailing plant is perfect for hanging baskets, windowsills, or patio containers. It offers all the charm of a trailing succulent with the low-maintenance needs succulent lovers appreciate.

Here’s everything you need to know to grow a thriving, long-lasting String of Dolphins — whether indoors or out.

What Type of Plant Is String of Dolphins?

String of Dolphins is a succulent trailing hybrid in the Asteraceae family.

As a cross between two distinct succulents, it inherits drought tolerance, plump foliage, and sprawling stems.

The leaves resemble tiny leaping dolphins, making it a popular pick for quirky plant lovers and collectors.

It grows best in USDA zones 9–11 outdoors and is typically grown indoors in cooler climates.

Ideal Light Conditions for String of Dolphins

This plant thrives in bright, indirect light, but can also handle short bursts of direct sun.

• Indoors: Place near an east or south-facing window with filtered light.

• Outdoors: Position in a partially shaded area, where it gets 4–6 hours of morning sun.

• Avoid intense afternoon sun, which may scorch the leaves, especially behind glass.

Without enough light, the plant may grow leggy, and the distinct dolphin shapes will stretch and lose definition.

When and How To Water String of Dolphins

Watering is one of the most important care elements for this plant — too much leads to root rot, while too little can shrivel the leaves.

Follow this rule of thumb:

• Water only when the top 2–3 inches of soil are completely dry.

• In warmer months, this usually means watering every 10–14 days.

• In winter, water less frequently — often once every 3–4 weeks.

Always water deeply and allow excess to drain. Never let the plant sit in standing water.

Best Soil Mix and Drainage Tips

Like most succulents, String of Dolphins needs quick-draining soil to prevent root rot.

Use a mix like this:

• 50% cactus mix

• 25% perlite or pumice

• 25% coarse sand

Alternatively, amend standard potting soil with extra drainage material to ensure roots never stay soggy.

Always use a container with a drainage hole.

Temperature and Humidity Needs

This succulent prefers warm, dry air and doesn’t tolerate cold well.

• Optimal range: 65–80°F (18–27°C) during the day

• Minimum temperature: No lower than 50°F (10°C)

• It prefers low to moderate humidity — misting is not required

If grown outdoors, be sure to bring the plant inside well before frost.

How and When To Fertilize String of Dolphins

Although not a heavy feeder, this plant benefits from a light feeding schedule to support leaf growth.

Use the following method:

• Fertilize in spring and summer only

• Use a balanced 10-10-10 fertilizer like this one or 20-20-20 like this one, diluted to ¼ strength

• Apply once every 4–6 weeks during the growing season

Avoid over-fertilizing, which can cause the plant to stretch and lose its compact trailing shape.

Common Problems and Troubleshooting Tips

Despite being relatively easy to care for, String of Dolphins can run into a few issues if neglected or overwatered.

Here are the most common:

• Shriveled leaves: Underwatering or too much direct sun. Check the soil and relocate if needed.

• Mushy leaves or stem rot: Caused by overwatering or compacted soil. Let soil dry fully before watering again.

• Leggy growth: Insufficient light. Move to a brighter location or supplement with a grow light.

• Pest problems (aphids, mealybugs): Wipe with a damp cloth or treat with neem oil or insecticidal soap.

With consistent conditions and moderate watering, these problems are easy to avoid.

Pruning and Shaping Tips

String of Dolphins tends to grow quickly once established.

Light pruning can help maintain its dolphin-like shape and encourage fuller growth.

• Prune in early spring or after flowering

• Trim any leggy or damaged stems

• Use clean, sharp scissors to avoid damaging stems

• Cuttings can be used for propagation — they root easily in soil or water

Regular pruning prevents the plant from becoming too straggly or top-heavy.

Repotting and Transplanting

You won’t need to repot String of Dolphins often — only when it outgrows its container.

• Repot every 2–3 years in early spring

• Choose a pot only 1–2 inches wider than the previous one

• Refresh the soil with a new well-draining mix

Allow the plant to settle for a week after repotting before watering to reduce transplant shock.

Is String of Dolphins Pet-Safe?

⚠️ Pet Safety Note: String of Dolphins is mildly toxic to cats, dogs, and humans if ingested. Keep out of reach of curious pets or children.

If chewed or eaten, it may cause nausea, vomiting, or upset stomach.

Final Word

String of Dolphins is a charming, trailing succulent that adds a playful touch to windowsills, hanging baskets, and plant shelves.

With its low watering needs, quick growth, and striking foliage, it’s a perfect addition to any succulent lover’s collection.

Keep it in bright, indirect light, water only when dry, and you’ll enjoy cascading waves of dolphin-shaped leaves year-round.