I think that there should be some sort of garden keeper in the Crowns Shop. He will tend you garden for a week, giving the plants everything they need. You wouldn't get quite as much experience for them, but I think this is a good idea for people who have a garden, but are going on a vacation with no computer, so nothing will happen to their plants. Either that or a different crowns thing that will freeze the plants in their current state for a week. Hope you like my ideas!