A hybrid species between Alocasia odora and A. poreti, this variety displays superb resilience against cold conditions for an Alocasia. They grow rapidly and produce enormous ruffled leaves with age.
Alocasia ‘Portora’ (Upright Elephant Ear) [also Alocasia ‘Portadora’]
Deciduous: no (will die back in temperatures below 10 degrees Celsius (50 Fahrenheit), dies below -18 Celsius (0 Fahrenheit))
Hardiness Zones: 7b-11
Height: to 3 meters (10 feet) tall
Diameter: to 1.5 meters (5 feet) wide
Growth Rate: fast, to 1.8 meters (6 feet) in 12 months of uninterrupted growth
Root System: fibrous
Subspecies: ‘Portora’ is a hybrid. ‘Portora Red’ and ‘Portora Green’ are distinguished by the color of the spathe.
Tolerates: light frost
Problems (major): root rot (especially when young and/or during winter/dormancy periods)
Problems (minor): red spider mites (in arid conditions)
Poisonous: All parts of this plant, primarily the leaves and tuber, contain Calcium Oxalate crystals, which cause soreness and swelling in the mouth and throat region if ingested.
Soil requirements: requires moist, well-drained soils, preferably neutral to acidic, prefers bi-monthly fertilization
Air requirements: prefers humid environments (humidity above 50 percent)
Watering requirement: moderate, daily once mature
Sun requirement: best performance in full sun, tolerates partial shade
Leaves: large with ruffled margins, prominent veins, to 1.5 meter (5 feet) long by 0.6 meters (2 feet) wide
Flower structure: typical Alocasia inflorescence; tall, thin peduncle; light green spathe; cream colored spadix with two visibly distinct portions
Flowering frequency: any time during the year (personally observed indoors in winter (Febuary in Carbondale, Il)) Subterranean storage organ: tuber
The foliage grows exceptionally large and with exceptionally scalloped ruffles.
This large, cold-hardy hybrid is sometimes grown as a rapid growing herb (typically a perennial in suitable zones or if taken indoors in colder zones during winter)
Younger foliage amongst the parent ‘trunk’
All of the images provided were taken by me. They may be used for educational/informational purposes only, provided that this article/online journal is appropriately cited first.