False Aralia (Plerandra elegantissima) is an attractive plant admired for its unique, delicate foliage. Its deeply serrated, slender leaflets, ranging from coppery red to dark green, create a distinctive lacy appearance. While often grown indoors, False Aralia can thrive outdoors in suitable climates, adding an exotic touch to landscapes. Outdoors, it can reach a larger size than typically seen indoors, where it rarely exceeds six feet.
Climate Suitability and Hardiness
False Aralia can be successfully grown outdoors in USDA Plant Hardiness Zones 10 through 12, and potentially in protected areas within Zone 10. The plant is sensitive to frost and freezing conditions, struggling in temperatures below approximately 55°F (13°C) and particularly vulnerable below 41°F (5°C), which can lead to leaf drop and even plant death. Its heat tolerance extends to about 100°F (38°C), though temperatures exceeding 109°F (43°C) can cause leaf discoloration.
Ideal Outdoor Growing Conditions
False Aralia thrives outdoors in conditions mimicking its native tropical understory. It prefers bright, indirect light or partial shade, receiving ample light without harsh direct sun. Too much direct sunlight can scorch its delicate leaves, while insufficient light may result in leggy growth or duller leaf color. Positioning it for filtered morning sun and afternoon shade is beneficial.
Well-draining soil rich in organic matter is optimal. The plant prefers a slightly acidic to neutral soil pH, ideally between 5.5 and 6.5. Consistent moisture is important, but avoid waterlogging, which can cause root rot. Water thoroughly when the top one to two inches of soil feel dry, typically once a week during the growing season. False Aralia also prefers high humidity, ideally between 60-80%.
Outdoor Care and Maintenance
Once established, False Aralia benefits from regular fertilization during its active growing season, from spring through early fall. Apply a balanced liquid fertilizer every two weeks, diluted to half or quarter strength, to promote lusher foliage and a stronger root system. Slow-release granular options are also suitable. During cooler months, fertilization should be reduced or stopped.
False Aralia is a slow-growing plant requiring minimal pruning. Pruning maintains size and shape, removes dead or damaged branches, or encourages a bushier form. The best time for significant pruning is late winter or early spring before new growth. For minor shaping or removing yellowing leaves, pruning can occur in summer or autumn, ensuring no more than a quarter of the plant’s total size is removed at once.
Monitor for common pests like spider mites, mealybugs, aphids, and scale insects. Early detection and treatment with insecticidal soap can manage infestations effectively. False Aralia is also sensitive to strong winds, which can damage its delicate foliage. Select a sheltered planting site or provide temporary windbreaks to mitigate wind effects.
Winter Protection for Outdoor False Aralia
In borderline hardiness zones, protecting outdoor False Aralia during colder months is important. Applying a thick layer of mulch around the base of the plant can help insulate the roots from freezing temperatures and regulate soil moisture. For cold snaps or prolonged low temperatures, cover the plant with burlap or frost cloth for additional protection. This creates a microclimate, shielding foliage from direct cold and wind. If False Aralia is grown in containers, bring them indoors for winter. Indoor temperatures should ideally be maintained between 65°F and 75°F (18°C and 24°C) with adequate humidity for the plant to thrive.