How to harvest sunflower seeds?
When are sunflower seeds ready to be harvested?
The way I do it, is to cut down the blooms when the petals fall off, and hang them upside down until the seeds start to pop out. Then you can pull out the rest of the seeds. Here is an article for more information: https://www.gardeningknowhow.com/ornamental/flowers/sunflower/harvesting-sunflowers.htm