Water and Humidity
Native to tropical and rainforest climates, philodendron is not a drought-tolerant plant. During the growing season, water thoroughly when the soil is barely dry to the touch — enough to soak the root ball, but not so much that the soil becomes soggy. Excess water should drain freely. In the winter, when philodendron’s growth slows or stops briefly, water only enough to keep the soil barely moist. Philodendron prospers in a humid atmosphere, particularly in dry homes, which you can provide by setting pots on top of pebbles in water-filled trays.