Anthuriums are popular houseplants, treasured for their vibrant, often heart-shaped flowers and glossy foliage. For these tropical plants to flourish and consistently produce their striking blooms, proper light exposure is paramount.
The Ideal Light for Anthuriums
Anthuriums thrive in bright, indirect light, mimicking their natural habitat beneath a rainforest canopy where sunlight is filtered by taller trees. This means they need ample illumination without direct, harsh sun exposure. Bright indirect light typically ranges from 500-1000 footcandles, which allows for robust growth and flowering.
Direct sunlight can be detrimental, as its intensity, which can reach 10,000 to 12,000 footcandles on a clear day, is far too strong for anthurium leaves. This intense light can scorch their delicate foliage, leading to irreversible damage. Conversely, insufficient light hinders the plant’s ability to photosynthesize effectively, ultimately leading to stunted growth and a lack of flowering.
Providing Optimal Indoor Light
Achieving the ideal light for anthuriums indoors involves strategic placement. North or east-facing windows are often ideal as they provide softer, consistent light throughout the day. If south or west-facing windows are the only option, placing the plant a few feet away from the window or using sheer curtains can effectively diffuse the intense sunlight.
Supplemental grow lights can be beneficial, especially in homes with limited natural light or during darker winter months. Full-spectrum LED grow lights are a suitable choice, mimicking natural sunlight and supporting overall plant development. Position these lights approximately 12-24 inches above the plant for 10-12 hours daily.
Identifying Light Problems
Recognizing signs of improper light exposure is important. Symptoms often appear on the foliage, indicating whether the plant is receiving too much or too little light. Observing these changes early allows for timely intervention.
When an anthurium receives too little light, its growth can become sparse and leggy. Leaves may appear pale or dull, losing their vibrant color, and the plant might fail to produce flowers or develop only small, discolored blooms. Lower leaves may yellow and fall off prematurely.
Conversely, too much light manifests as scorched or bleached spots on the leaves, indicating sunburn. The leaves may also turn yellow or brown, with edges becoming crispy and dry. Overall growth can appear stunted.
Correcting Light Issues
Addressing light-related problems promptly can help restore anthurium health. Adjustments should be gradual to avoid shocking the plant, allowing it time to acclimate to new conditions.
For anthuriums showing signs of too little light, move them to a brighter location, closer to a suitable window or under a grow light. Increasing the duration of supplemental light can also be effective. If a plant is receiving too much light, relocate it to a more shaded spot. Installing sheer curtains or blinds can diffuse overly bright sunlight.