Amaranth | Baker Creek Heirloom Seed Co

I like to eat Amaranthus from Foodland, tastes like baby spinach and is healthy.

I see the plants for sale in many nursery's but have no idea which one will grow the best and tastes the best.

Does anybody here grow them to eat the leaves?
Also the seeds seem to be very healthy and the plants make loads of them.

I have one flowerbed that i m willing to offer for only amaranthus but it is in partial shade. The soil is clay with loads of compost so will that be a good spot to grow it?