Ok, this is actually insanely cool.....
I have the latest build of unity, all the mods are current (crops 0.2), and the crops still aren't showing up, however, KingofWorms sprites for the crops are showing up, and I can harvest them.
So maybe those flats are replacing them somehow, I don't even know.
But it is pretty sweet.
I went and took all the crop sprites out, still nothing.
But harvesting the sprites works, and they do respawn.