Haha very cute game. If anything you can discover everything by day 5 so I would have enjoyed it if there was more seeds to find. Would be interesting to know how the score works as well.
Not a big "bug" really but I noticed that when you move the mouse over the seeds on the side UI very fast, the panel may not show their info even though it had registered the mouse events. It happens because the mouse_entered and mouse_exited signals fire in the same frame and sometimes the mouse_exited event listener will happen after the mouse_entered one. Since you're using Godot, I thought I would share one simple way to fix this problem which is that one can connect the mouse_entered signal to a listener with the CONNECT_DEFERRED flag, which will make the mouse_entered event listener always fire at the end of the frame, thus always fire after the mouse_exited signal and will eliminate this little bug.
Other than that, it's a well made entry. Good job!