My sunflowers had finished flowering a while ago. After each sunflower leaves had turned yellow and dead I cut the head off it. So far I have four heads cut and drying. I didn’t want to leave them out in the garden as I was afraid the birds and squirrels would harvest the seeds before I could get to them. Funny thing is, no animal has tried harvesting them yet. This is the first time I have ever got a sunflower head full of seeds. I am feeling very shocked.