Teacup Colocasia, also known as ‘Tea Cup Elephant Ear’ or ‘Teacup Taro’, is a tropical plant with distinctive foliage. Its leaves are notable for their upward-facing, cup-like shape, collecting water. Glossy green leaves are often accented by dark purple veins and stems.
Growing Teacup Colocasia
Teacup Colocasia flourishes when provided with specific environmental conditions during its active growing season.
Light Requirements
Teacup Colocasia performs well in locations ranging from full sun to partial shade. For best foliage color and teacup formation, bright, indirect light is recommended. In hotter climates, afternoon shade can prevent leaf scorching.
Watering Needs
These plants demand high water, thriving in consistently moist to wet soil. They can even tolerate standing water, making them suitable for water gardens or boggy areas. Maintain consistent moisture without waterlogging, as prolonged standing water can drown roots. During dry periods, water frequently and thoroughly; mulching helps retain soil moisture.
Soil Preferences
Teacup Colocasia benefits from rich, well-draining, slightly acidic soil. Incorporating organic matter, such as compost or well-rotted manure, enhances soil fertility and moisture retention. Loam soil provides an ideal growing medium. For container planting, a peat-based mixture with perlite, vermiculite, or sand offers necessary drainage while retaining moisture.
Temperature and Humidity
As a tropical perennial, Teacup Colocasia thrives in warm temperatures and high humidity. The optimal temperature range for active growth is between 65°F and 90°F (18-32°C). Temperatures below 50°F (10°C) can cause plant stress. For indoor plants, high humidity can be achieved by placing a humidifier nearby or grouping plants.
Fertilization
Teacup Colocasia are heavy feeders and respond well to regular fertilization during their growing season. Applying a balanced, water-soluble fertilizer, such as a 20-20-20 or 10-10-10 N-P-K ratio, every two to four weeks supports lush foliage. A high-nitrogen fertilizer (e.g., 20-10-10) can also promote larger, more vibrant leaves. Always dilute liquid fertilizers to about 50% strength to prevent nutrient burn, and ensure the soil is moist before application.
The Distinctive Teacup Effect
The ‘Teacup’ name refers to its unique leaf structure. The large, glossy leaves curl upwards, forming a deep, cup-like shape that collects rainwater. As the “teacups” fill, stems bend, tipping to pour out the water. Once emptied, leaves return upright, ready to collect more. This process offers a fresh water source for pollinators.
Winter Care and Dormancy
In regions with cold winters (USDA Zones 7 and below), Teacup Colocasia enters a dormant phase and requires protection from freezing temperatures. For outdoor plants, tubers can be lifted from the ground before the first hard frost. Remove excess soil; air dry tubers for 1-2 weeks in a well-ventilated area. Store dry tubers in a cool, dark, dry indoor location (41-50°F / 5-10°C) until spring.
For potted plants, bring them indoors before temperatures drop consistently below 50°F (10°C). Allow the plant to go semi-dormant by reducing watering and letting foliage die back naturally. Alternatively, cut back leaves for full dormancy, storing the pot in a cool, dry place. During indoor storage, light watering every 4-6 weeks may be needed to prevent tuber drying, but avoid overwatering to prevent rot.
Common Growing Challenges
Teacup Colocasia can encounter a few common issues. Yellowing leaves signal overwatering or underwatering, stressing the root system. Too much direct sunlight can yellow or scorch leaves; insufficient light leads to chlorosis. Stunted growth indicates inadequate light, insufficient nutrients, or root confinement.
Spider mites and aphids can affect Teacup Colocasia, especially indoors. Regular inspection and prompt treatment with horticultural spray prevent widespread damage. Consistent moisture and good air circulation deter many pests. Proper soil drainage and avoiding excessive wetness mitigate root rot and fungal diseases.