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PlantSnap
Plant Care
Giant blue cohosh
(Caulophyllum giganteum)
Also Known As
Giant blue cohosh, Large blue cohosh, Blue cohosh
About This Plant
Caulophyllum giganteum is a perennial herbaceous plant species that belongs to the Berberidaceae family. It is native to the eastern United States and Canada, and is commonly known as giant blue cohosh or Indian hellebore. The plant has large, lobed leaves and produces small, blue-green flowers in the spring.
Plant Care Instructions
Outdoor Size Range
2-3 feet (60-90 cm)
Light Requirements
Caulophyllum giganteum prefers partial to full shade, and can tolerate more sun in cooler climates. Direct sunlight can scorch the leaves.
Humidity Needs
Caulophyllum giganteum prefers moderate to high humidity levels. It can benefit from occasional misting.
Fertilizing Schedule
The plant does not require frequent fertilization, but can benefit from a balanced, slow-release fertilizer in the spring.
Pruning Guidelines
Caulophyllum giganteum does not require frequent pruning, but dead or damaged leaves and stems can be removed as needed.
Common Pests and Diseases
The plant is relatively pest-free, but can be susceptible to slug and snail damage. It can also be affected by powdery mildew in humid conditions.
Indoor Size Range
12-18 inches (30-45 cm)
Watering Schedule
The plant prefers consistently moist soil, but can tolerate short periods of drought. Overwatering can lead to root rot.
Temperature Range
The plant prefers cool to moderate temperatures, between 50-75°F (10-24°C). It can tolerate brief periods of colder temperatures, but is not frost-tolerant.
Growing Season
The plant typically grows in the spring and summer months, and goes dormant in the winter.
Growing Difficulty Level
Caulophyllum giganteum is considered moderately difficult to grow. It requires consistent moisture and humidity levels, and can be sensitive to direct sunlight and overwatering.
USDA Hardiness Zones
Caulophyllum giganteum is hardy in USDA zones 4-8.
Did You Know?
Caulophyllum giganteum has a long history of use in traditional medicine by indigenous peoples in North America, and is still used today as a natural remedy for menstrual cramps and other women's health issues.
