It’s easy! Actually these are from seeds I harvested in a park. After the flowers bloom the seed pods will develop. They can be opened up and planted in autumn or spring. Lupines are legumes like peas, so look for pea pods and let them ripen until the seeds are black https://lemmy.ca/pictrs/image/c771d1d4-bc6b-48f7-a0d2-aa1ca539c1c4.jpeg