Before you harvest the seeds, the sunflower head must be completely dry. If you leave the heads on the plants to dry you risk loosing some to birds and other critters. Drying them indoors or in a protected area is a good idea. The time it takes to dry depends on how mature the seeds are and what the conditions are in the area where you dry the seeds. Like any seeds, keep them in a cool dry place until you replant them next spring.
Before you harvest the seeds, the sunflower head must be completely dry. If you leave the heads on the plants to dry you risk loosing some to birds and other critters. Drying them indoors or in a protected area is a good idea. The time it takes to dry depends on how mature the seeds are and what the conditions are in the area where you dry the seeds. Like any seeds, keep them in a cool dry place until you replant them next spring.