This precursor of spinach is a hearty little thing. It grows just about anywhere the soil has been disturbed. And, oh wow! It is edible. The argument of late is whether the Palmer Amaranth is edible. And the answer to that is...well.... somewhat complex. I asked a wonderful resource, Green Dean, of www.eattheweeds.com what he knew about this situation and, after much asking around, he says that A. Palmer is certainly edible HOWEVER, best not to eat it from the Round Up® treated fields. The reason is that every edible plant grown for human consumption that is treated with Round Up® has a known "poison span" ( my word) meaning that as long as the product is picked between X and Y it is safe for humans to eat. However, if a weed has been sitting in the field for Z period of time no one knows what the uptake of the Roundup® is or what the overall effect of treatment is to the growth of the weed. With amaranth, a known nitrate consolidator, it could be that it takes up too much of this chemical when exposed to Round Up® and thus, could be unsafe for human consumption. Hence, eat the A. Palmer but don't eat it from fields that have been treated with Round Up® any time soon! Actually, I think I would apply this rule to any weed you find in a field that has been chemically treated... even your lawn.