Water Philodendron when the top one to two inches of soil have dried out, which is often about once a week in spring and summer. Allow Philodendron to dry more between waterings in fall and winter, watering roughly every ten to fourteen days as growth slows. Philodendron prefers soil that is evenly moist but never waterlogged, so pour off any water left in the saucer after about fifteen minutes. Drooping or yellowing lower leaves on a Philodendron often signal overwatering rather than thirst. When in doubt, wait an extra day, because Philodendron tolerates a brief dry spell better than soggy roots.
Philodendron grows best in bright, indirect light near an east- or north-facing window. Philodendron will tolerate medium and lower light, though stems stretch and leaves grow smaller and farther apart. Keep Philodendron out of harsh direct afternoon sun, which can scorch and bleach the foliage. If a Philodendron leans hard toward the window, rotate the pot a quarter turn each week so it grows evenly. Pale, washed-out new leaves on a Philodendron usually mean the light is too intense, while long bare gaps between leaves mean it is too dim.
The cited reference lists Philodendron (Philodendron) as toxic to cats and dogs; ingestion can cause oral irritation, intense burning of the mouth and tongue, drooling, vomiting, and difficulty swallowing. The toxicity of Philodendron is attributed to insoluble calcium oxalate crystals present throughout the plant's tissues. Keep Philodendron out of reach of cats and dogs, since even chewing a leaf can trigger these symptoms. If a cat or dog is suspected of chewing or swallowing any part of a Philodendron, contact a veterinarian or a poison-control line promptly. This reference describes what the source reports about Philodendron and does not certify the plant for any household.
Plant Philodendron in a loose, well-draining mix, such as potting soil amended with bark, perlite, or coir. Choose a pot for your Philodendron with drainage holes so excess water can escape freely. Repot a Philodendron every one to two years, or when roots circle the bottom or grow out of the drainage holes. Move Philodendron into a container only one to two inches wider, because an oversized pot holds excess moisture around the roots. The best time to repot a Philodendron is in spring or early summer during active growth.
Yellowing leaves on a Philodendron most often point to overwatering, while crispy brown leaf edges suggest the air is too dry or the soil stayed dry too long. Brown spots on Philodendron foliage can follow direct sun exposure or cold drafts from a window or door. Leggy, sparse growth tells you a Philodendron needs brighter, indirect light. Inspect a Philodendron regularly for spider mites, mealybugs, and aphids, and wipe the leaves or treat with insecticidal soap if pests appear. Wiping the leaves of a Philodendron with a damp cloth removes dust and helps the plant breathe and photosynthesize.