Colocasia esculenta ‘Black Magic’, also known as Black Magic Taro or Elephant Ear, is a striking plant known for its deep, smoky purplish-black foliage. This tuberous perennial hails from tropical Asia. Its large, heart-shaped leaves provide contrast.
Cultivation and Care
Cultivating Colocasia ‘Black Magic’ requires consistent environmental conditions. The plant thrives in locations ranging from full sun to partial shade, with full sun exposure often intensifying the dark coloration of its leaves. In regions with particularly hot summers, providing some afternoon shade can help protect the foliage from scorching.
This tropical plant requires abundant and consistent moisture, like a bog plant. It prefers soil that remains continuously moist, and can even be grown in standing water up to 6 inches deep, suitable for water features. Regular watering is necessary, especially during dry periods, to prevent the soil from drying out.
Ideal soil for ‘Black Magic’ is rich, well-draining, and retains moisture effectively. Incorporating organic matter, such as compost, improves soil quality, providing the nutrients this heavy feeder requires. A soil pH ranging from slightly acidic to neutral, typically between 6.5 and 7.5, supports growth.
Warm temperatures are essential for this tropical species, thriving between 65°F and 85°F. Exposure to temperatures below 50°F is detrimental. High humidity is also beneficial, maintained by misting leaves or placing the plant near water sources.
Regular fertilization during the growing season promotes foliage development. Applying a balanced liquid fertilizer every 2 to 6 weeks is recommended. Diluting the fertilizer to half or quarter strength prevents overfeeding.
Winterizing and Dormancy
Colocasia esculenta ‘Black Magic’ is a frost-tender perennial. In warmer climates, USDA Zones 8-11, the tubers can remain in the ground year-round. For gardeners in colder zones, USDA Zones 3-8, the plant requires winter protection.
Potted plants can be brought indoors before the first frost for overwintering. While inside, reduce watering significantly, keeping the soil barely moist to prevent rot. The plant may enter a semi-dormant state, and some leaves might turn green or drop due to lower light.
Alternatively, the corms can be dug up and stored. After the first frost, carefully lift the tubers, clean off soil, and allow them to dry for 1-2 weeks. Store the dried corms in a cool, dry, and dark location, in peat moss, wood shavings, or paper bags, where temperatures remain between 45°F and 60°F.
Common Problems and Toxicity
While robust, Colocasia esculenta ‘Black Magic’ may encounter issues. Common pests include spider mites, aphids, and whiteflies, especially when grown indoors. Ensuring good air circulation and inspecting plants regularly helps manage infestations.
Root rot is a disease concern, resulting from waterlogged conditions without adequate drainage. Although the plant prefers moist soil, proper drainage prevents this issue. Strong winds can damage large leaves; a sheltered location is beneficial.
All parts of Colocasia esculenta ‘Black Magic’ are toxic if ingested. This plant contains calcium oxalate crystals, causing irritation to the mouth and digestive tract. Exercise caution when handling, and wear gloves to prevent skin irritation from the sap.