polygonum sachalinense in spring. green young plant in spring. stalks of polygonum sachalinense. gardening

autumn background beautiful biology bloom blossom branch crenate edible exotic fallopia floral flower foliage garden giant green grow growth gynodioecious heartshaped herbaceous invasive japanese japonica knotweed leaf leaves margin natural nature perennial pest plant polygonaceae polygonum sachalinense sachalinensis sacharinensis sakhalin season seasonal shoot spring sprouts stalk stem weed wild