Sometimes called Blue Coshosh, Caulophyllum thalictroides is a shade loving perennial plant with small yellow starry flowers in spring followed by blue berries. Used both as a garden plant as well as a herbal remedy. Originally from North America Blue Coshosh requires moisture and shade to grow well.
In the garden Blue Coshosh os grown for the ferny or lacy foliage and the blue berries the flowers are rather insignificant. This is a plant that will naturally spread by underground rhizomes over time. It is slow to spread and does not seem invasive.
This is a plant that is reputed to have a number of homeopathic uses, however we think that its place is best as a garden plant in a moist woodland setting. The common name comes from the new foliage which emerges with a hint of blue in spring.
Easily propagated from seed, or by division of the underground rhizomes during dormancy.
Berries are toxic and plants should not be consumed.
Caulophyllum thalictroides – Summary Information.
- Height – Will reach around 60 cm in height.
- Spread – Will spread over 30 cm and will form a clump over time.
- Position – Dappled shade or woodland conditions.
- Soil – Humus rich with some moisture.
- Foliage – Mid green and attractive ferny foliage.
- Flowers – Yellow flowers on wiry stems held above the foliage, followed by pale green berries which as they mature turn to a deep blue.
- Flowering period – Spring.
Easy care in a moist woodland situation, however this is not a plant that copes well with drought or hot dry summers.
In a moist soil in dappled shade Caulophyllum thalictroides can be left undisturbed for many years. The reward is the foliage and the colourful dark blue berries late in the season.