"Nurture a tree's health level to its highest, healthiest state. You'll need a Watering Can to do this. And your firmest Petting hand."
This is confusing, and if a player is confused (even 1) then that's a fault in the game not a means of discovery.
I was told to pet and water multiple trees so, the statement "Nature a tree's health" should be changed to "Nature trees to their fullest health"
I didn't spend $38,000 in a Game Design Program for nothing.