To understand if an Anthurium can go outside, we must first consider its origins. Anthuriums are tropical understory plants, native to the rainforests of Central and South America. In this natural environment, they thrive under the dense canopy of taller trees. This means they are adapted to conditions of bright, but filtered or dappled, sunlight. They are never exposed to the full, intense strength of the midday sun. Furthermore, they enjoy consistently warm temperatures and high humidity levels, sheltered from strong winds and heavy downpours by the forest canopy above. Any decision to move an Anthurium outside must aim to replicate these protected, stable conditions as closely as possible.
Light is the most significant factor in this decision. While summer sunlight is more intense than what your Anthurium receives indoors, the key is indirect light. Placing your Anthurium in a spot that receives direct sunlight, especially during the peak hours of 10 am to 4 pm, will almost certainly scorch its beautiful, glossy leaves, causing brown, crispy patches and irreversible damage. The ideal outdoor location is one that offers bright shade, such as under a pergola, a dense tree, or on a north or east-facing patio that only gets gentle morning sun. It is also crucial to acclimatize the plant gradually. Do not move it from a relatively dark indoor spot directly into a bright outdoor area. Over a period of 7-10 days, gradually increase its exposure to the outdoor light to allow its leaves to adjust without stress.
Anthuriums are sensitive to temperature fluctuations. They prefer a range between 65°F and 80°F (18°C - 27°C). While summer days often fall within this range, you must be cautious of nighttime temperatures. If temperatures are forecast to drop below 55°F (13°C), it is imperative to bring the plant back indoors, as prolonged exposure to cool temperatures can stunt growth and damage the plant. Regarding humidity, the outdoor air in summer is often more humid than conditioned indoor air, which is beneficial. However, during dry, hot spells, you may need to supplement by misting the leaves occasionally to prevent the leaf tips from browning, a common sign of low humidity.
Your Anthurium's watering needs will change outdoors. Increased light, warmer temperatures, and better air circulation will cause the potting mix to dry out more quickly than it does indoors. You will need to check the soil moisture more frequently, likely watering when the top inch of soil feels dry. However, the principle of good drainage remains paramount. Ensure the pot has drainage holes and never let the plant sit in a saucer of water, as waterlogged soil will lead to root rot. On the positive side, the improved air circulation outdoors can help prevent fungal diseases that sometimes occur in stagnant indoor air.
Moving your plant outside does expose it to a different set of pests. Be vigilant for common garden insects such as aphids, mealybugs, scale, and spider mites. Regularly inspect the leaves (both topsides and undersides) and stems, and be prepared to treat any infestations promptly with insecticidal soap or neem oil. Furthermore, you must protect the plant from sudden weather events. A strong summer storm with heavy rain and wind can physically damage the leaves and flowers and can also flood the pot. It is advisable to have a plan to move the plant to a sheltered location or bring it indoors during periods of severe weather.
