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The Plant Guide

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Blue cohosh

Caulophyllum thalictroides

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This plant's three-lobed, veined leaves are dark purple when they emerge and later turn green. Greenish brown or yellowish brown flowers appear in mid- and late spring, turning into waxy blue berries that dangle beneath the leaves.

Noteworthy CharacteristicsBerries split open to reveal berry-like seeds that turn from green to blue. Very slow to increase in size.

CareGrow in moist, humus-rich, acidic soil, in part to full shade in a woodland setting.

PropagationDivide in spring while dormant or after blooming. Sow seeds in containers in an open frame; germination is slow and erratic.

ProblemsFungal spots sometimes occur.

  • Genus : Caulophyllum
  • Plant Height : 1 to 3 feet
  • Zones : 3, 4, 5, 6, 7, 8
  • Plant Width : 6 to 12 inches
  • Flower Color : Green, Yellow
  • Bloom Time : Late Spring, Spring
  • Moisture : Medium Moisture
  • Light : Partial Shade to Full Shade
  • Plant Type : Perennials
  • Characteristics : Showy Fruit
  • Growth Rate : Slow
  • Plant Seasonal Interest : Spring Interest
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