Alocasia Polly and Alocasia Amazonica are two popular ornamental plants often confused due to their similar appearance. Both belong to the Alocasia genus and are prized for their striking foliage. However, they exhibit distinct differences in morphology, growth habits, and care requirements. Below, we explore these differences in detail to help plant enthusiasts identify and cultivate them effectively.
Alocasia Polly is a hybrid cultivar, often considered a compact version of Alocasia Amazonica. Its exact parentage is debated, but it likely derives from crosses involving Alocasia longiloba and Alocasia sanderiana. It is not a naturally occurring species but a cultivated variety.
Alocasia Amazonica, sometimes labeled as Alocasia × amazonica, is also a hybrid, though its origins are more documented. It results from crossing Alocasia longiloba and Alocasia sanderiana. Despite its name, it has no direct connection to the Amazon rainforest.
Leaf Size and Shape: Alocasia Polly typically has smaller leaves, averaging 6–10 inches in length, with a more arrow-shaped (sagittate) appearance. The leaves of Alocasia Amazonica are larger, often reaching 12–16 inches, with a broader, more elongated structure.
Leaf Color and Texture: Both plants feature dark green leaves with prominent white or silvery veins. However, Alocasia Polly’s veins are often more pronounced and contrast sharply against the darker foliage. Alocasia Amazonica may exhibit slightly lighter green leaves with less stark veining.
Plant Size: Alocasia Polly is more compact, usually growing 1–2 feet tall, making it ideal for tabletops or small spaces. Alocasia Amazonica can grow taller, reaching 2–3 feet, with a more robust and spreading habit.
Light Requirements: Both plants thrive in bright, indirect light but tolerate slightly different conditions. Alocasia Polly is more sensitive to low light and may lose its vibrant leaf markings if underexposed. Alocasia Amazonica can adapt to moderate light but prefers consistent brightness.
Humidity and Temperature: Alocasia Amazonica demands higher humidity (60% or more) and warmer temperatures (65–80°F). Alocasia Polly, while also humidity-loving, is slightly more tolerant of occasional dry spells but still prefers warm conditions.
Growth Rate: Alocasia Amazonica tends to grow faster under optimal conditions, producing new leaves more frequently. Alocasia Polly grows more slowly, with a more controlled and compact form.
Watering Needs: Both plants require consistently moist soil but are prone to root rot if overwatered. Alocasia Polly’s smaller size means it dries out slightly faster, requiring more frequent checks. Alocasia Amazonica’s larger root system retains moisture longer but is equally sensitive to waterlogging.
Soil Preferences: A well-draining, peat-based mix suits both, but Alocasia Amazonica benefits from a richer, more organic substrate due to its vigorous growth. Alocasia Polly does well in standard aroid mixes with added perlite or orchid bark.
Fertilization: Alocasia Amazonica, with its faster growth, benefits from monthly fertilization during the growing season. Alocasia Polly requires less frequent feeding, typically every 6–8 weeks, to avoid nutrient burn.
Both plants are susceptible to spider mites, mealybugs, and aphids. However, Alocasia Amazonica’s larger leaves may attract pests more readily. Alocasia Polly’s compact growth can make pest detection slightly easier. Both may exhibit leaf yellowing if overwatered or exposed to cold drafts.
Both species propagate via division of rhizomes or offsets. Alocasia Amazonica produces more offsets due to its vigorous growth, while Alocasia Polly’s slower growth means fewer divisions are possible. Tissue culture is also used commercially for both varieties.
