Originally Posted by
Kolonistje1
To ask another stupid question.. (as you can see from Nutty's comment not everyone knows these tricks)... You do know you have to place the exclamation mark by the tree so someone else can see it and revive the tree? If you tap the tree after the 3rd harvest you should see the options of a saw and an exclamation mark (in a menu like field similar to when you want to plant crops or fill a maker) and then you need to drag the exclamation mark and place it by the tree. If you don't drag the mark someone else can't revive the tree.
Also you can see a clue to the lifecycle stage of a tree or bush by its size. A newly planted tree or bush is very small and they grow after harvest 1 and 2.
I am sorry if I am stating the obvious.