poa annua, bromus hordeaceus, matricaria discoidea, plantago major, achillea millefolium, chenopodium album, elymus repens, fallopia convolvulus, galinsoga parviflora, medicago lupulina, persicaria lapathifolia, rumex acetosella, sonchus oleraceus, spergula arvensis, stellaria media, artemisia vulgaris, sambucus nigra