We made these for an art installation, not to wear.

Materials:
red worsted weight yarn (3 to 4m per poppy)
black worsted yarn (less than 1m per poppy)
3.5mm crochet hook
yarn needle for weaving ends

Pattern Notes:
There are 5 versions in this pattern.
They all start the same way with the black centre.
US crochet terms are used.

Making other sizes with larger or smaller yarn:
Use a hook size smaller than the yarn ball suggests.
For larger yarns, chunky and bulky, I make the black centre with hdc instead of sc.