Aristolochia chilensis, also named the Oreja de Zorro (Zorro?s Ear), is an evergreen vine from the tropical regions of South America, mostly in Chile. It can reach 3 to 6 meters tall. This rugged robust vine also does well in containers with regular watering.
From spring to summer, the vine produces quantities long fragrant flowers scattered among the drooping leaves. Boomerang-shaped leaves on twining stems carrying strikingly beautifully marked, purple-green inflated flowers. The flowers look like the nepenthes. The flowers trap insect pollinators and facilitate cross pollination. These are very unique flowers; the rounded kidney-shaped heads are dark purple and the rim is covered with white hair. The fruit is a capsule, green maturing to brown and opening to release many fertile seeds. Prune back shoots after flowering.
Aristolochia chilensis is a vine with beautiful shady green weird shaped leaves and paler underneath. These grow closely together to create a dense mass of foliage. These slender woody stems twine gracefully in tight coils around fence wire and other supports lifting itself to heights of 3 to 6 meters.
Hardiness zones 9-11, (-5øC/25øF,4øC/40øF) in winter. In zone 9, the tops will be killed to the ground in freezing weather but usually return in the spring. Aristolochia chilensis likes to grow in a light and airy place, but not in direct sunlight. Keep summer temperatures from 20-25øC and winter temperatures above 10øC.
Water once or twice a week during growth period. Water no more than once a week during winter. The plant can endure short periods of drought and still look fresh. Fertilize with a balanced fertilizer every third watering throughout the growing season. It grows best in rich, well-drained soil. It requires only average soil to look good. The plant does well in light sandy soils.