1. Planting:  Place the Philodendron Selloum in bright, indirect sunlight, ideally in a sunny window with a thin curtain or blinds. Maintain a distance of 5 feet from nearby shrubs; if near a tree, you can plant it closer. 

This plant prefers moist, well-draining soil rich in organic matter and thrives in warm, humid conditions. Typical indoor temperatures and humidity levels are usually sufficient, as long as it’s not near heating vents or drafty windows.

2. Watering:  Water your plant regularly, but allow it to dry out between waterings. Philodendrons cannot tolerate a wet environment, as this can lead to rot. If the humidity in your home is below average, consider using a humidifier.

3. Fertilizing:  Fertilize your plants three times a year (in spring, summer, and autumn) using a high-quality granular fertilizer. Alternatively, you can fertilize monthly during the growing season. To prevent fertilizer burn, refrain from fertilizing in the fall and winter months, when the plant enters dormancy.