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PlantSnap
Plant Care
Umbrella dracaena
(Dianella ensifolia)
Also Known As
Umbrella dracaena, Blue flax lily, Narrow-leaved flax lily, Spear lily
About This Plant
Dianella ensifolia is a perennial herbaceous plant species that belongs to the family Asphodelaceae. It is a clump-forming plant that can grow up to 2 feet (60 cm) tall and 1.5 feet (45 cm) wide. The plant has strap-like leaves that are about 1 inch (2.5 cm) wide and up to 2 feet (60 cm) long. The flowers are small, blue, and star-shaped, and they appear in clusters on tall stems in the spring and summer.
Plant Care Instructions
Outdoor Size Range
1.5-2 feet (45-60 cm)
Light Requirements
Dianella ensifolia prefers partial shade to full sun, but it can also tolerate full shade. It is best to provide bright, indirect light if grown indoors.
Humidity Needs
Dianella ensifolia prefers moderate to high humidity levels. It is best to provide a humidifier or place the plant on a pebble tray filled with water to increase humidity.
Fertilizing Schedule
Fertilize Dianella ensifolia once a month during the growing season with a balanced, water-soluble fertilizer. Do not fertilize during the winter months.
Pruning Guidelines
Remove any dead or yellowing leaves as needed. Cut back the flower stems after they have finished blooming to encourage new growth.
Common Pests and Diseases
Dianella ensifolia is relatively pest-free, but it can be susceptible to spider mites, mealybugs, and scale insects. Treat any infestations with insecticidal soap or neem oil.
Indoor Size Range
12-24 inches (30-60 cm)
Watering Schedule
The soil should be kept evenly moist, but not waterlogged. Water the plant deeply once a week, and more frequently during hot and dry weather. Allow the soil to dry slightly between watering.
Temperature Range
Dianella ensifolia prefers temperatures between 60-75°F (15-24°C). It can tolerate temperatures down to 50°F (10°C) and up to 90°F (32°C).
Growing Season
Dianella ensifolia can be grown year-round in USDA hardiness zones 9-11, but it is best to plant it in the spring or fall when temperatures are mild.
Growing Difficulty Level
Dianella ensifolia is a relatively easy plant to grow and care for, making it a great choice for beginner gardeners.
USDA Hardiness Zones
USDA hardiness zones 9-11
Did You Know?
Dianella ensifolia is also known as the 'Blueberry Lily' because its blue flowers resemble blueberries.
