white dragon knotweed
Its astilbe-like white plumes are popular with butterflies and attractive seed heads that invite birds.
Persicaria polymorpha (white dragon knotweed) is native to China and Japan. It’s a shrubby, clump-forming perennial featuring plumes (panicle racemes) of creamy white flowers reminiscent of goat’s beard (Aruncus dioecus). Synonymous with and sometimes sold as Polygonum polymorphum. Even though it has thick roots it is not invasive and can grow as big as 6 feet tall.
|Botanical Name||Persicaria polymorpha|
|Common Name||white dragon knotweed|
|USDA Zone||4 thru 9|
|Light Requirement||Full Sun to Part Shade|
|Season(s) of interest||spring, summer, fall, winter|
|Height and Spread||3-6ft x 3-4ft (90-180cm x 90-120cm)|
|Attracts Wildlife||Rarely Browsed by Mammalian Herbivores|
|Additional Information||Not Native to the US Midwest. Native range: Asia.|
|Location in Lurie Garden||Southwest Dark Plate, North Dark Plate|