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PlantSnap
Plant Care
Blue fountain bush
(Rotheca serrata)
Also Known As
Blue fountain bush, Blue butterfly bush, Clerodendrum serratum, Thai basil
About This Plant
Rotheca serrata is a flowering plant species that belongs to the family Lamiaceae. It is a shrub that can grow up to 10 feet (3 meters) tall and 6 feet (1.8 meters) wide. The plant has green leaves and produces beautiful blue-violet flowers that bloom in clusters from spring to fall.
Plant Care Instructions
Outdoor Size Range
6-10 feet (1.8-3 meters)
Light Requirements
Blue butterfly bush requires full sun to partial shade. It can tolerate some shade but will produce fewer flowers.
Humidity Needs
Blue butterfly bush prefers moderate to high humidity levels.
Fertilizing Schedule
The plant benefits from regular fertilization during the growing season. Use a balanced fertilizer every two weeks.
Pruning Guidelines
Prune the plant in early spring to encourage new growth and maintain its shape. Remove any dead or damaged branches.
Common Pests and Diseases
Blue butterfly bush is susceptible to spider mites and whiteflies. It may also be affected by powdery mildew.
Indoor Size Range
Not suitable for indoor growing
Watering Schedule
The plant should be watered regularly during the growing season, but it is important not to overwater it. The soil should be allowed to dry slightly between watering.
Temperature Range
The plant can tolerate a wide range of temperatures, from 20°F (-6°C) to 100°F (38°C). However, it is important to protect it from frost in colder climates.
Growing Season
The plant grows best in spring and summer.
Growing Difficulty Level
Blue butterfly bush is relatively easy to grow, but it requires some care and attention to thrive.
USDA Hardiness Zones
Blue butterfly bush is hardy in USDA zones 9-11.
Did You Know?
The blue butterfly bush is a popular plant for attracting butterflies and hummingbirds to gardens.
