The amaranthus does come in green. If you grew them from seed, you may have been sold the "green" variety of this plant. If not, you may want to check on your growing conditions. This plant prefers well-draining soil with a pH balance of 6.0 to 7.5. This article will help: https://www.gardeningknowhow.com/ornamental/flowers/love-lies-bleeding/love-lies-bleeding-flower.htm
I saw this last summer and really liked it. I want some but have no idea what it is. Thanks for your help.
It may be Love Lies Bleeding, though it seems more upright. Here is more:
https://www.gardeningknowhow.com/ornamental/flowers/love-lies-bleeding/love-lies-bleeding-flower.htm