Split-leaf plants, also called split-leaf philodendrons or tree philodendrons, are large shrubs with huge, 3-foot-long, glossy, split-lobed leaves. The split-leaf philodendron is a tropical shrub used as a houseplant or grown outdoors in warm climates, growing as tall and wide as 15 feet with a 6-inch-diameter stem. Native to the rain-forest regions of Brazil and Paraguay, the split-leaf plant grows best outdoors in USDA Hardiness Zones 9 through 11, where average winter temperatures stay above 55 degrees Fahrenheit. Due to the split-leaf philodendron's warmth and humidity requirements, the plant is container-grown indoors in most regions.
Fill a planter pot that has drainage holes in the bottom with rich, all-purpose potting soil. The planter pot should be about 1 1/2 times larger than the nursery container.
Bury the split-leaf philodendron's roots into the potting soil. Place the split-leaf plant in bright, indirect sunlight, preferably within 8 feet of a sunny window.
Water the split-leaf philodendron once every week to 10 days. Water the plant to moisten the soil evenly and thoroughly.
Prune away any lower leaves that become discolored to keep the split-leaf philodendron tidy and healthy. Wear gloves when you're cutting into the plant, because its sap can irritate your skin.
Spray a mixture of 2 teaspoons of liquid dish soap and 1 pint of water onto the split-leaf plant if it becomes infested with spider mites, aphids, mealybugs or scales.
Care for your split-leaf philodendron during winter by cutting back on watering the plant to keep the soil just barely moistened. Mist the plant with water when the indoor air is dry.