Now, let's get to the good stuff! To harvest the seeds, you'll need to cut the flower head from the plant, leaving a few inches of stem attached. Then, hang it upside down in a warm, dry place, like a sunroom or a shed.
As the seeds dry, they'll start to loosen and fall off the flower head. It's like a little seed party! You can collect the seeds in a bowl or a bag, and then store them in an airtight container to keep them fresh.
But, don't forget to clean the seeds before storing them. You'll want to remove any debris or chaff that's stuck to the seeds. It's like giving them a little seed spa day!
When To Get Sunflower Seeds at Sherri Branch blog