Yeah, I planted anything I could just for more chances. Herbs, Allotments, and Hops patches. Got all of my watermelon seeds from TempleTrekking minigame. And planted Barley in the hops, though even those tended to die occasionally. Usually got them within 2 days (checking twice daily). I usually got them from the hops patches more than any of the other ones. Also, use supercompost because it increases yield a little bit. Do you have the strange rock bag? Whenever I lost a rock in my bank, it was usually because I had some rocks loose in the bank and some in the bag.