To care for a Philodendron Goeldii, provide it with bright, indirect light, preferably near a window. Maintain a temperature range of 65-85°F (18-29°C) and ensure the soil remains evenly moist but not waterlogged. Philodendron Goeldii appreciates higher humidity, so misting the leaves or using a humidifier can be beneficial. Regular fertilization during the growing season and periodic pruning to remove dead or yellowing leaves are also crucial for its care.