Perhaps I’m just misunderstanding the expand farm system, but it appears I can only expand fields outward by the minimum 5x5 amount. Meaning you can’t just expand an existing farm a single tile at a time. In my specific instance, I created a 5x5 farm, that I would like to expand to 5x6. But I seem to only be able to start the expansion from the edge of the existing field, and draw out to the 5x5 minimum.
I saw some other posts here about dragging over the existing farm, but that just gives me the “invalid placement” error so perhaps this system was changed? Either way it’s frustrating and unintuitive.