Pothos (Epipremnum aureum) is a popular and resilient houseplant. While commonly grown indoors, many consider moving Pothos outdoors during warmer periods. Understanding its temperature tolerances is important for successful outdoor cultivation and continued vibrancy.
Ideal Outdoor Temperature Range for Pothos
Pothos thrives in stable, warm conditions that mimic its native tropical habitat. The optimal outdoor temperature range is generally between 65°F and 85°F (18°C to 29°C). Maintaining temperatures within this range supports active photosynthesis and promotes vigorous, lush foliage. This consistent warmth allows the plant to grow efficiently and maintain proper metabolic functions.
While Pothos can tolerate brief deviations, prolonged exposure outside this range can lead to stress. The plant benefits from warm environments without extreme or sudden temperature fluctuations.
Pothos and Cold Temperatures
Pothos, a tropical plant, is sensitive to cold temperatures. It generally cannot tolerate temperatures consistently below 50-55°F (10-13°C). Even brief exposure below 40°F (4°C) can cause significant damage. Signs of cold stress include yellowing leaves, brown spots, or wilting.
In severe cases, foliage may blacken or stems become mushy, indicating irreversible cell damage. Pothos is hardy only in USDA Zones 10-12, meaning it is not suitable for year-round outdoor growth in most climates. In cooler regions, it is important to bring Pothos indoors before overnight temperatures consistently drop below 50°F (10°C) or before the first frost. Bringing the plant inside proactively helps prevent cold injury, as severe damage can be difficult for the plant to recover from.
Pothos and Hot Temperatures
Pothos can also experience stress in excessively hot temperatures. While it can tolerate warmer conditions, temperatures consistently above 90-95°F (32-35°C) can be problematic. Extended periods above this threshold can lead to heat stress symptoms like wilting (even with adequate watering), yellowing leaves, or scorched areas. Leaves may also curl inward or upward as the plant attempts to conserve moisture.
To protect Pothos from high heat, move it to a shadier location, especially during the hottest parts of the day. Ensuring consistent soil moisture without overwatering is important, as heat increases transpiration rates. Increasing ambient humidity can help mitigate drying effects.
Seasonal Transition and Care
Transitioning Pothos between indoor and outdoor environments requires a gradual approach to prevent shock. When moving plants outdoors in spring, gradually acclimate them to increased light, temperature, and air movement. Start by placing them in a sheltered, shady spot for a few hours each day, slowly increasing their outdoor exposure over a week or two. This “hardening off” process helps the plant adjust.
When bringing Pothos indoors for fall, begin the transition before temperatures become too cool. Monitor weather forecasts to anticipate dropping overnight temperatures. Inspect the plant for pests before bringing it inside to avoid introducing them. Adjust watering frequency and light exposure as the plant adapts to its new surroundings.