SO HELIX. WHAT YOU ARE SAYING THAT I HAVE TO MOVE ANYWAY IF I WANT TO GROW RICE. UPGRADE MY FARM 3 TIMES. AND GRAINS DONT NEED WATERING? I COULD HAVE BEEN FISHING INSTEAD OF WATERING WHEAT. (I JUST SOW YOUR REPLY TO MY CRY FOR HELP) THANKS HELIX
Yes you need to move to Konohana and upgrade it 3 times if you want to plant rice, as the rice paddy only available in Konohana.
And yes, all grains don't need watering, you can just leave them there until they are ready to be harvest. I also in the same situation as you before, as I keep watering my Soybean, and then I found out that it doesn't need to be watered at all.