reynoutria japonica blooms with white flowers in september. berlin, germany

germany japonica blooms white flowers september fallopia polygonum species herbaceous perennial knotweed buckwheat family polygonaceae berlin plant plants background bastard teak botanical flame forest tree garden green herbal leaf natural nature organic day fig fresh gourmet harvest leaves local mediterranean shrub growth japanese landscape outdoors botany grass outdoor germany reynoutria september cuspidatum polygonaceae