Hi there, I've taken over a new community garden plot this year, and have planted a few things of my own. Throughout my weeding, I can tell the poppies, the kales, the arugulas, clovers, thistles apart. But I've been coming across this plant, below. The one with the red stem and red-to-green leaves. Blooms the white flower at top. Sorry bit of a messy garden photo, but The red plant some what distinct. At first I thought it was amaranth, but it isn't as this one has flowered. Is it just a non useful weed? Can anyone identify? Greatly appreciated.