Ageratina altissima 'Chocolate' syn. Eupatorium rugosum 'Chocolate'

Close up of these tiny delicate flowers.

Other common names snakeroot 'Chocolate' Family Asteraceae Genus Ageratina are shrubs or herbaceous perennials with opposite leaves and small tubular flowers borne in corymbs Details 'Chocolate' is an herbaceous perennial with purple stems bearing ovate, dark chocolate-brown tinged leaves and umbel-like clusters of small white flowers in summer and early autumn

Has now started to flower, really pretty white flowers against the dark foliage.

Not heard of this but like the dark foliage 👍

Me neither @Keely it was the colour of the foliage that caught my eye when I saw it at the gc today. Can't wait to see what the flowers will look like 😊

How to grow Cultivation The ideal site is a moist, alkaline soil in partial shade; frost may damage new shoots Propagation Propagate by division in spring Suggested planting locations and garden types Flower borders and beds Cottage & Informal Garden Wildlife Gardens How to care Pruning Cut back faded flower stems to base Pests May be attacked by slugs and aphids Diseases Generally disease free