Making a condition be exclusive for an object?

Im making a game, were the player plants trees to collect them, and to make them collectable i made an event trigger at the end of the animation of the plant growing, that set a bool to true so the player can collect them, but that way every other plant becomes collectable even if it hasant grown yet.
So my question is how can I make each plant have its own single bool or eventTrigge,r to make them collectable only when them had finished their animation.

the script must be attached to each tree so each one have her own Boolean variable