knotweed ‘Blackfield’

Bistorta amplexicaulis ‘Blackfield’ 

Botanical Name Bistorta amplexicaulis ‘Blackfield’
Common Name knotweed ‘Blackfield’
Family Polygonaceae
USDA Zone 4 thru 9
Light Requirement full sun, part shade, shade
Season(s) of interest summer, fall
Height and Spread 3 ft x 1.5-3ft (90cm x 45-90cm)
Flower Color red, pink, maroon
Attracts Wildlife attracts pollinators, drought tolerant
Additional Information not native to the US Midwest. B. amplexicaulis native to the Himalayas. Introduction from breeder Chris Ghyselen of Belgium.
Location in Lurie Garden Extrusion Plaza

Average Flowering Time