I dot Amaranth around the veg garden in between herbs and summer veg.
It grows quite slowly until the end of summer when it puts on an a final spurt of growth, the heads fill out and it looks spectacular.
I bend over the thick branches one by one in autumn for my
chickens and uproot individual stalks for the the pigs who love it and I'm sure the goats would too if I grew
enough.
I've tried growing quinoa but with no success.