So I looked into it a bit more and I think I know what happened!
You did plant oats - not barley. You start off the game with 15 oat seeds and 15 seed potatoes so maybe the UI got mixed up on your device?
While some of your potato harvest gets added to your seed potato pile, the only way to acquire more oat seeds, or any barley seeds, is to go to the shop and spend some of the money that would be going towards rent
Ok that sounds right - I may have pressed the oats button and then the barley one (which obviously did nothing).
Some visual feedback could help here - like showing an icon somwhere showing what you are about to plant.
Or make the little highlight on the button (took me a while before I noticed that) stand out more - could be much bigger and in yellow maybe.
If its any help, the crop grew into stalks which I couldn't walk through.
