These are 2nd generation 'Mammoth' sunflowers, grown from seeds saved many years ago. I planted them along the fence line behind the rock garden to try to mitigate the reflected heat off the fence. They did okay but did show some heat scald. Nonetheless, they bloomed and put on a nice show!
Now they have gone to seed, and some have already exploded all over the planting area.
To collect seeds, cut the head of the sunflowers off and place them in a paper bag to dry. Seeds will pop off on their own and collect in the bag as they dry, and those that don't can be easily brushed loose by hand later.
Some seeds have already popped loose out of these two!
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