Senecio hallianus - String of Blue Beans

Trailing and softly sculptural, Senecio hallianus is a striking succulent known for its plump, bead-like leaves with a subtle blue-green hue and delicate striping – earning it the nickname String of Blue Beans. These cascading strands are fast-growing and perfect for hanging pots, succulent shelves, or windowsills bathed in light. Easy to propagate and drought-tolerant, it brings a soft, trailing texture to your space – and may even surprise you with sweetly scented white blooms when happy.

Scientific Name
Senecio hallianus (Senecio = Latin for “old man”; hallianus = named after South African botanist Harry Hall)

Synonyms
Curio hallianus (accepted modern classification)

Common Name
String of Blue Beans, String of Watermelons, Trailing Senecio, Gooseberry Plant

Origin
Native to southern Africa, where it grows as a trailing groundcover over dry, rocky hillsides.

Light
Thrives in bright, indirect light, and develops stronger colour and compact growth with some gentle direct sun. Ideal for south- or west-facing windows indoors.

Water
Allow the soil to dry out completely between waterings. Water deeply, then drain. Overwatering is the most common cause of problems – this plant stores moisture in its leaves and prefers to dry out fully between drinks.

Humidity
Prefers low to average indoor humidity. Avoid placing in very humid or poorly ventilated spots.

Soil
Use a free-draining cactus or succulent mix. You can improve drainage by adding extra grit, perlite, or sand to standard compost.

Food
Feed every 4–6 weeks in spring and summer with a diluted cactus or succulent fertiliser. No need to feed in winter.

Temperature
Prefers 18–26°C. Protect from frost and avoid temperatures below 10°C.

Pet-safe
No – Senecio species are toxic if ingested by pets or humans.

Sprouts Top Tips
Trim and replant long strands to keep it full and bushy. The blue tone intensifies in good light and drier conditions. Rotate occasionally to ensure even trailing on all sides.