Senecio herreanus -String of Watermelon

Senecio herreanus, now more accurately classified as Curio herreanus, is a trailing succulent with plump, oval leaves that look like tiny watermelons. Each leaf has green striping and a slightly translucent quality. As it matures, it cascades beautifully over pots and shelves, making it a standout hanging or trailing plant.

It is closely related to String of Pearls but has thicker, heavier leaves and a slightly thicker look.

What makes it special?

The leaf pattern is what sets this plant apart. The striping looks almost hand painted, and the leaves grow dense on trailing stems, giving it a full appearance when healthy. It also tends to be a bit more forgiving than String of Pearls once established, especially when light and drainage are dialed in.

Key facts

Scientific name: Curio herreanus (formerly Senecio herreanus)
Family: Asteraceae
Native range: Namibia and southern Africa
Growth form: Trailing succulent
Common use: Hanging baskets, shelf edges, trailing arrangements

How to care for it

Light
Bright indirect light is ideal. It can tolerate some gentle direct sun, especially morning light. Too little light will cause stretched growth and wider spacing between leaves.

Water
Water thoroughly only when the soil is completely dry. This plant stores water in its leaves and is very sensitive to overwatering. Err on the dry side.

Soil
Use a gritty, fast draining succulent mix. Good drainage is essential to prevent root rot.

Temperature
Prefers warm temperatures and should be protected from frost. Typical indoor conditions work well.

Fertilizer
Optional. If used, apply a diluted succulent fertilizer once or twice during the growing season.

Blooming
May produce small, cinnamon scented white flowers under the right conditions. Blooms are subtle and seasonal.

Pet safe?
May cause mild to moderate symptoms if ingested, such as vomiting or stomach upset. We recommend keeping out of reach of pets.

Humidity
Average household humidity is sufficient. Avoid overly humid environments.

Propagation
Very easy to propagate from stem cuttings. Allow cut ends to dry before placing on or into dry soil.

Troubleshooting

Leaves becoming soft or translucent
Most often caused by overwatering or poor drainage. Let the soil dry fully and reduce watering frequency.

Leaves shriveling or deflating
A sign of underwatering. A deep watering should help the leaves regain firmness.

Long stems with sparse leaves
Usually caused by insufficient light. Move the plant to a brighter location.

Stems dying back at the base
Can indicate root rot. Trim healthy sections and propagate to save the plant.

Why we love this plant

We love Senecio herreanus because it combines visual interesting with a relaxed growth. It adds softness and movement to a space without needing constant attention. The watermelon striping is fun but still refined, and when cared for properly, it grows into a full, cascading plant that looks intentional and beautiful!

It is one of those trailing succulents that always gets noticed, especially once it starts spilling over the edge of a pot.