Huh, that is weird. And you can hoe it at any time (even when it's green?) and walk on it to harvest it?
Currently working on a beta 2.1 build to fix that stuff, I guess I forgot to add that stuff in. I'm also updating all of the libraries I use for the game (ctrulib, sf2dlib, and nihstro) to their latest versions, which I hope fixes that rendering issue because I have never seen that before.