Philodendron melanochrysum aka Black Gold Philodendron

Philodendron melanochrysum, or black-gold philodendron, belongs to the Araceae family. It is an evergreen climber from wet tropical regions. Kew lists Colombia as its native range. The RHS also includes Panama in its plant range. This species keeps its leaves throughout the year. Gardeners grow it as a foliage plant under glass. Its climbing form suits a greenhouse or conservatory setting.

Growth is slow, and mature plants need room to climb. The RHS gives a cultivated height of 8–13 feet [2.5–4 metres]. Its description also notes plants reaching 10 feet [3 metres] or more. The spread reaches about 1.6–3.3 feet [0.5–1 metre]. Plants take around five to ten years to reach maturity. Large, heart-shaped leaves give this climber much of its character. Each leaf has a soft, velvet-like surface. The deep green blade has a copper sheen. Pale green veins stand out against the darker leaf. Leaf length ranges from 0.8–2.5 feet [0.25–0.75 metres].

Grow this plant in bright light filtered from direct sun. The RHS also lists partial shade as a suitable position. Use compost rich in humus that lets excess water drain. Keep the growing medium moist, rather than allowing water to linger. Water moderately, and give less water when temperatures fall. The RHS lists loam as a suitable soil type. It accepts acid, neutral, or alkaline soil conditions. Choose a sheltered place for the plant. In Britain, it needs glasshouse protection throughout the year. Its RHS hardiness rating is H1A. Keep winter temperatures at or above 59°F [15°C].

The RHS lists patio and container planting among its uses. That does not remove its need for warmth and protection. Its main visual interest comes from its large, dark leaves. The narrow spread contrasts with its much greater climbing height. New plants can come from softwood stem-tip cuttings. Leaf-bud cuttings offer another way to propagate this species.

The RHS reports few disease problems for this plant. Scale insects and glasshouse red spider mites may still attack it. It is harmful to people and pets if eaten. Contact can also irritate skin or eyes, or cause allergic reactions. Wear gloves and other protective gear when handling it.