I believe that trees are not aware like other animals are aware, as they have no brain or such things. However, they do have some sort of self-regulation that enables them to know how to grow to a certain extent.
We interrupt Are Trees Aware? to share wise words from way back when:
Today is: 29th February (GMT), in history on the 29th of February, 1988 AD the following event happened:
Nazi document implicates Waldheim in WWII deportations