You know what would be cool? A "Help request" sticker or something. To ask people to help with a specific tree, watering that one to the max before helping with others. Something that highlights that tree, has it pop up to players in any way.

Reason: If I deployed my drone, I want that tree to be helped to the max so I can jump over the sleep-barrier effectively. If that tree doesn't get any help in the cycle, it would take me more drones. The cost could be similar to that of a drone, since it's not an item that one needs all the time.