Giant blue cohosh (Caulophyllum giganteum)

Giant blue cohosh

Giant blue cohosh (Caulophyllum giganteum) is found mainly in the damp, thick forests of northeastern North America and some parts of Asia. It prefers rich but rocky soils and shade or partial sunlight. Unlike any other forest floor plant, the giant blue cohosh grows flowers on stems like a shrub but lacks branches like a perennial. It is in the Barberry family.

Scientific classification

Species

Giant blue cohosh (Caulophyllum giganteum)

Buttercups, poppies and allies

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Perennial

Lifespan

Herb

Plant Type

Early spring, Late winter

Bloom Time

Purple, Brown, Yellow, Green, Red

Flower Color

Deciduous

Leaf type

0 - 32 ℃

Ideal Temperature

Images of Giant blue cohosh

Care Guide for Giant blue cohosh

Every week

Water

Partial sun

Sunlight

0 - 32 ℃

Ideal Temperature

Water: Giant blue cohosh thrives in moist soil similar to its deciduous forest habitat, handling moderate drought but preferring consistent moisture. Weekly watering is recommended. Best grown outdoors, giant blue cohosh benefits from filtered light and seasonal rain, crucial for its growth cycle.

Fertilize: Giant blue cohosh thrives with balanced NPK fertilizers applied bimonthly during active growth. Proper fertilization enhances health, but excess can be harmful, especially in winter. Adjust amounts for size and always water thoroughly post-application to prevent root burn. Regular feeding in spring and summer promotes vigor.

Pruning: Giant blue cohosh thrives with early to late spring pruning, focusing on dead or damaged stems to encourage healthy growth. Trimming overgrown areas maintains shape and prevents crowding, aligning with its growth cycle for enhanced vitality, flowering, and overall health in the garden.

Propagation: Giant blue cohosh is a unique perennial that propagates best from fresh seeds sown in well-drained soil. Maintain consistent moisture, avoiding waterlogging. Once seedlings are robust, transplant them to a shaded location, as giant blue cohosh thrives away from full sunlight.

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