caulophyllum thalictroides (blue cohosh, squaw root, papoose root) native zone 5

caulophyllum thalictroides (blue cohosh, squaw root, papoose root) native zone 5insignificant yellowish green flowers blue green meadow rue like foligae woodland perennial bloom time: early spring zone 3 height 45 70cm spread 50 60cm colour lime green best grown in a shady, woodland area in a rich, humusy, consistently moist soil slow to establish and best left undisturbed once mature partial sun shade, shade native to ontario (image courtesy of NVK nurseries, NVK holdings inc.)

may require staking when the plant is about 30-40cm tall

they can be pruned any time of the year and used for topiary

slightly acidic

turns to yellow-gold in the summer

grows best in a well-drained

showy whorled lavender flowers on short spikes

grass-like foliage

it will tolerate a wide range of soil types and conditions

deep green fronds throughout the summer In dry spells and autumn

spread 2-4m

flowers add height to these late-blooming plants

leaves emit fragrance when crushed