How to Care for Outdoor Split Philodendron

Grow split-leaf philodendron in well-draining, evenly moist and fertile soil, with exposure to filtered morning sun and afternoon shade. Enrich the soil with well-rotted manure or organic compost before planting the evergreen. If container-growing it outside, fill a clay pot with equal amounts peat moss, perlite and topsoil.

Irrigate the split-leaf philodendron regularly to keep the roots from becoming dry. The drought-intolerant plant thrives in soils kept consistently moist throughout the summer, and lightly moist in the winter. Determine the soil's moisture content every other day during the summer and irrigate if the top 1 inch feels dry to the touch. Avoid over-watering the soil, however, to keep the plant from developing root rot, and always irrigate the plant at soil level, as opposed to overhead irrigation, to avoid wetting the leaves.

Feed the plant a well-balanced fertilizer every two months during the growing season. Depending on personal preference, dilute a water-soluble fertilizer or spread fertilizer pellets around the plant's base. Read label directions for fertilizer rates so you do not over-fertilize the plant.

Prune the split-leaf philodendron in spring, before new growth appears on the plant. Use lopping shears to cut dead or dying foliage leaves at their base, flush with the main vine, leaving as little stump as possible. Also, cut discolored leaves to maintain the plant's appearance.

Inspect the plant for pests including mites, scales and mealy bugs, and treat immediately to prevent spread. The pests suck juices from the foliage, causing them to turn partially or completely yellow, depending on the scale of infestation. Dislodge the bugs with a spray of water from a hose, or spray insecticidal soapy solution over them.

Watch out for signs of stress such as yellowing or browning foliage that appear wilted or curled. Over-watering the plant prevents its roots from absorbing oxygen, thus causing the leaves to turn yellow and then brown. Stop irrigating the evergreen and let the soil dry lightly before watering it again. The tips of leaves curl downward and the leaf margins turn brown in case of over-fertilization. Reduce fertilization and water the soil deeply to leech out accumulated fertilizer salts.