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| Knotweed, Smartweed|
Tall, thick, bushy and full of large lanceolate leaves and profuse flowering for most of the summer. Large, white and sometimes fragrant panicles cover this plant for an extended time.
Plant Type: perennial
Plant Form or Habit: upright/vertical
Plant Use: In the back of beds and borders, as a specimen plant, as a screen.
Width: Minimum: 36 inches Maximum: 72 inches
Foliage Texture: coarse medium
USDA Hardiness Zone: 5
Water Requirements: average
Additional Comments: We have not found it invasive, but it is quite sturdy and needs space to grow. Susceptible to Japanese beetles, but easily overcomes any damage.