"I'm planting a haycorn, Pooh, so that it can grow up into an oak-tree, and have lots of haycorns just outside the front door instead of having to walk miles and miles, do you see, Pooh?"
The House at Pooh Corner, 1928
I think Pokernet must have had the same idea...
Christopher Robin says to watch out for cars when going to hunt haycorns.