While my vegetable gardening skills leave much to be desired, I did hit a home run this season with sunflowers. I think just about every seed I planted blossomed into a full sunflower head. As you can see, the heads filled up the front-end loader on my tractor.
Many people say that harvesting the seeds is a chore, but the secret is waiting until the back of the head turns black. At that point, the seeds almost fall out on their own.
We will store the seeds and feed the birds all winter with our largesse. Unfortunately, the 'coons and squirrels will probably get more than there fair share.