https://scholars.uky.edu/es/publications/competition-and-proliferation-of-four-smartweed-species-in-cotton/
Competition and proliferation of four smartweed species in cotton -
competitionproliferationfoursmartweedspecies
https://eshop.cernyseed.cz/en/annuals/polygonum-capitatum-smartweed/
flower and vegetable seeds - Polygonum capitatum - Smartweed - Cernyseed.cz
Polygonum capitatum (Smartweed) is covering annual, sale in V-VI, sowing 3 g per 1,000 plants, from II directly into 8 cm flower pots.
flower and vegetable seedssmartweedcz