Philodendron lupinum is a unique and lesser-known Philodendron species, admired for its distinctive, elongated leaves and often silvery or metallic sheen. This Philodendron features lance-shaped leaves that can grow quite long, often reaching over a foot in length. The leaves are typically a deep green with a subtle, almost iridescent sheen, sometimes appearing bluish or purplish in certain light. It belongs to the Araceae family.
The genus name Philodendron comes from the Greek words philo (love) and dendron (tree), reflecting the plant's natural tendency to grow on trees in its native habitat. Lupinum is thought to refer to the plant's resemblance to some species in the Lupinus genus (lupines), possibly due to the shape or texture of the leaves.
Light: Philodendron lupinum thrives in bright, indirect light. Direct sunlight can scorch the leaves, while insufficient light may result in less vibrant colouring and slower growth. A spot near a window with filtered light, or a room with ample ambient light, is ideal.
Water: Allow the top inch or two of soil to dry out slightly between waterings. Water thoroughly when you do water, ensuring any excess drains away. Overwatering can lead to root rot, while allowing the plant to dry out too much can cause the leaves to wilt and brown.
Potting mix: A well-draining potting mix is essential. A standard houseplant potting mix, amended with perlite or orchid bark to improve drainage, is a good choice. Avoid mixes that retain too much moisture.
Fertilising: You can feed your Philodendron lupinum with a diluted balanced liquid fertiliser every 4-6 weeks during the growing season (spring and summer). Reduce or stop fertilising in the autumn and winter months.
Temperature: Philodendron lupinum prefers average room temperatures, generally between 18-24°C (65-75°F). It is not frost-tolerant and should be protected from cold temperatures. Avoid placing it near draughts or heating/cooling vents.
Humidity: While Philodendron lupinum can tolerate typical household humidity, it benefits from slightly higher levels. Using a humidifier or placing the plant on a pebble tray filled with water can be helpful, especially in drier environments.
Growth Habit: Philodendron lupinum is a vining plant that will appreciate a support to climb on, such as a moss pole or trellis. Providing support will encourage larger leaves and more vigorous growth.
Toxicity: Like other Philodendrons, lupinum is toxic if ingested, so it's best to keep it away from pets and small children.