What is this?
I havent been able to figure it out. The bees like it. I get 2 or 3 of them popping up randomly in garden beds each year. It was about 4 ft tall with leaves as big as your hand.
It looks to be one of the many species of Polygonum or Smartweed.
There are over 80 species that grow in the US. Here's a list of species to match it with.
i think you've pointed me in the right direction. At 1st i was wondering if it was the japanese knotweed that i've read about on here , but it has purple flowers. Looks like it may be related. I've also noticed a smaller version with white flowers and lance like leaves and a small purple flowered one with lance like leaves... looks like the are all somewhat related.