Anthurium plants, admired for their vibrant, waxy, heart-shaped spathes and lush foliage, have become popular houseplants. Originating from the tropical rainforests of Central and South America, these plants thrive in environments that mimic their native habitats. Temperature is a particularly important environmental element for their health and growth.
Ideal Temperature Conditions for Anthuriums
Anthuriums flourish in warm and consistent temperatures. During the day, the optimal range for these plants is 70°F to 85°F (21°C to 29°C), though they can tolerate 68°F to 86°F (20°C to 30°C). This warmth promotes robust vegetative growth and supports continuous flower production.
Nighttime temperatures should be slightly cooler, ideally 60°F to 75°F (15°C to 24°C). This slight drop in temperature at night benefits the plant’s metabolic processes and overall vigor, contributing to consistent flowering cycles. Temperatures exceeding 90°F (32°C) can cause stress.
Impact of Temperature Extremes
Temperatures outside the ideal range significantly impact anthurium health. When conditions become too cold, below 60°F (15°C), anthuriums suffer damage. Prolonged exposure to cold or sudden temperature drops leads to stunted growth as metabolic processes slow. Signs of cold stress include wilting leaves, which may also develop yellowing or browning, particularly along the edges. Extreme cold, especially temperatures approaching freezing, can cause significant tissue damage, making leaves crispy and papery, potentially leading to plant death.
Excessive heat, above 90°F (32°C), also threatens anthuriums. High temperatures increase transpiration, causing the plant to lose moisture rapidly and resulting in wilting leaves. Leaves may show scorching, appearing with brown or yellow patches, or curling inward to conserve moisture. Elevated temperatures can also reduce flowering and increase susceptibility to pests due to plant stress. Sustained high temperatures can lead to abnormal flower development.
Tips for Maintaining Anthurium Temperature
Strategic placement within the home helps anthuriums thrive. Position plants away from direct heat sources like radiators, heating vents, or appliances, as these cause localized temperature spikes and reduce humidity. Avoid placing them near drafty windows or air conditioning units, which subject plants to sudden cold blasts or consistent cool air. Locations offering bright, indirect light, such as near east or north-facing windows, are suitable as they provide consistent warmth without intense direct sun.
Seasonal changes necessitate adjustments. During colder months, if indoor temperatures drop, consider moving plants to warmer rooms or providing supplemental warmth, ensuring the heat source does not directly affect the plant. In hotter summer months, providing additional shade or ensuring good air circulation can prevent overheating. Monitor the temperature around your anthurium with a room thermometer, allowing for proactive adjustments before the plant shows stress.
Maintaining appropriate humidity levels connects to temperature management. These tropical plants prefer high humidity, 60% to 80%. Warmer temperatures can lead to lower ambient humidity, which is detrimental. Methods that increase humidity, such as pebble trays or humidifiers, can help counteract drying effects often associated with warmer, drier indoor air.