Growing Tree Philodendrons

Plant Description

• The South American native of the Araceae family has a self-heading and spreading habit. Plants are quite large, achieving a mature height and spread of 15 feet. The glossy 3-foot-long foliage is dark green with deeply divided splits. Outdoor plants produce reddish-purple spathes, held erect on 12-inch-long stems. Tree philodendrons grown in indoor conditions seldom produce flowers, according to Floridata.

Outdoor Growth

• Tree philodendron is a hardy plant, when grown in desirable outdoor conditions. Preferred light conditions include partial to filtered shade. The philodendron grows best in moist, rich soils that have good drainage. If your soil lacks organic nutrients, amend it with materials such as compost, manure or peat. Apply an 8-inch layer of organic materials over the planting site. Using a spade shovel, dig the organics approximately 12 inches into the soil. Plant the philodendron no deeper than it was already growing. Slice through or pull apart matted and circular growing root balls before planting.

Potted Growth

• Whether used indoors or outside, tree philodendron grows well inside containers. Since the large canopy has a tendency to be top heavy, using at least a 5-gallon pot keeps the plant grounded. The larger the pot used, the larger the plant becomes, according to North Dakota State University Extension. Plastic pots keep the soil moister for longer durations than terra cotta pots. Whatever style you use, make sure it drains. Amend a fertile, well-draining potting mix with slow-release fertilizer. Follow package directions when mixing into the soil. Plant the tree philodendron at the same level it was growing originally. Before planting, inspect the roots for matting or wrapping

Care

• When frosts threaten, relocate outdoor containers into a warm and protected location. Established plants grown outdoors that suffer frost damage may regrow in springtime if the damage is not too severe. Apply water to container-grown plants regularly to keep the soil moist, but don't let it get soggy and wet. Keep outdoor planting sites moist by thorough regular watering. Tree philodendrons perform best when grown in moist soils. Mist indoor plants weekly with water. This creates a preferred, humid environment. Situate indoor containers in an area that receives filtered sunlight. Fertilize container-grown plants monthly with a half strength solution of a water-soluble, high nitrogen blend. Apply a fresh layer of organic material over outdoor planting sites in spring. Prune to remove yellowing, dead leaves or to control the philodendron’s size. Apply a 4- to 6-inch layer of mulch around outdoor planting sites to retain moisture in the soil. Tree philodendrons seldom suffer pest infestation. If pest problems arise, use a product safe for philodendrons and follow product directions.