we have Horseweed far worse than Goldenrod world's finestweeding tool-- tongue-groove-pliers; a good design for robot-weeders
Cheers, it is called Fleabane or Horseweed. Conyza canadensis
thank you for revealing - in Europe it's called erigeron canadensis, but
flower color greyish blue and the long panicle with single flowerheads,
not in long spikes -
so you still have a chance to experiment on goldenrod with your plier
cheers
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