They also do that here with the farmer's markets! I thought that was pretty cool and how I found out about the first flower one I went to. (not the tulip/sunflower farm or the lavender) but the cut flower ones.
The tulip farm pulls the bulbs at the end of the season and plants sunflowers, so my passport is good for BOTH! I love that!
I cannot use all the sunflowers I can have, I run out of places to give them to! :) Isn't that a tough life? :)
Thanks, El! I hope you are having a great day!