Nematanthus 'Black Magic' - Goldfish Plant - Welsh Grown

A striking trailing houseplant, Nematanthus ‘Black Magic’ is known for its deep, glossy foliage that appears almost black in certain light. The dramatic leaves create a beautiful contrast with the plant’s small, tubular flowers, which typically appear in warm orange or red tones. The overall effect is bold yet elegant, making this variety a fantastic choice for hanging planters, shelves, or trailing displays.

Nematanthus plants belong to the Gesneriad family, the same group as African violets and lipstick plants. In their natural habitat they often grow as epiphytes in tropical forests, clinging to tree branches where they receive filtered light and high humidity. With the right balance of warmth, light, and careful watering, Nematanthus ‘Black Magic’ is a rewarding and relatively easy plant to grow indoors.

Scientific Name
Nematanthus ‘Black Magic’ (no widely documented Latin meaning; cultivar name referencing its dark foliage)

Plants in the genus Nematanthus were historically classified within the genus Hypocyrta. Modern botanical classification now places them firmly within Nematanthus, a genus of flowering plants in the Gesneriad family.

Synonyms
Previously associated with Hypocyrta species in older horticultural literature.

Common Name
Goldfish Plant (cultivar ‘Black Magic’)

Origin
Cultivar derived from species native to the tropical forests of Brazil.

Light
Prefers bright, indirect light. Some gentle morning or evening sun can help encourage flowering, but avoid harsh direct midday sunlight.

Water
Allow the top few centimetres of soil to dry between waterings. Water thoroughly, allowing excess moisture to drain away. Reduce watering slightly during winter.

Humidity
Prefers moderate to high humidity. It grows well in kitchens, bathrooms, or grouped with other plants where humidity levels are naturally higher.

Soil
Use a light, well-draining potting mix. A houseplant compost blended with bark and perlite works well, allowing moisture retention while preventing waterlogging.

Food
Feed every 4 weeks during spring and summer with a balanced liquid houseplant fertiliser. Pause feeding during winter.

Temperature
Thrives in temperatures between 18–26°C. Avoid temperatures below 12°C and protect from cold drafts.

Pet-safe
Not known to be toxic, though it is still best to keep houseplants out of reach of curious pets.

Sprouts Top Tips
Lightly pinch back trailing stems in spring to encourage fuller, bushier growth and promote more flowering.

Extras
This plant’s trailing growth habit makes it ideal for hanging pots or allowing stems to cascade from shelves.

Did You Know?
The common name “Goldfish Plant” comes from the shape of the flowers, which resemble tiny goldfish when viewed from the side.