The seedpods of Papaver somniferum (opium poppy) are a great decorative feature after the flowers are over. They can remain in the garden or be used in a floral display either fresh or dried.
It’s seed saving time! Once the pods are brown and the seeds are black, they’re ready to harvest. You can eat the seeds. They’re not psychoactive and make lovely baked goods, or you can scatter the seeds in autumn or late winter to grow in the spring. Poppy seeds need to experience winter to germinate. Direct sow on the ground where you want them to grow because they don’t transplant well. Opium poppies are annuals and need to be started from seed each year anew.
Morphine and codeine (a monomethyl ether of morphine) are opioid analgesics obtained from unripe seed pods of the opium poppy, Papaver somniferum (figure 19.18), and have been known for centuries.
"Chemistry" 2e - Blackman, A., Bottle, S., Schmid, S., Mocerino, M., Wille, U.