I find the Farming System pretty unique on Ol'West but when placing Seeds or taking the finished Crops i'm always sent a message with about 5 out of my 30+ Dardens saying something along the lines of 'this garden is not placed in the correct area please move it to a grass or sand area' (thats not what it actually says but it's something along the lines)
The thing is the garden is actually placed correctly, now the way i fix this for me personally is i move it to one spot then move it back to where it was before then tah daaaa, fixed or i come back to it in around 30 seconds and it works. Although this can be fixed yourself it is very annoying when your an avid farmer like myself producing something over 2k blueberry crops a day.