It's scientifically proven that trees are interactive and communicate among themselves and with other living organisms. They use scent and electrical signals. "Trees experience pain and have memories. Tree parents live together and care for their children in forests", according to Peter Wohlleben, who has recently published a wonderful book and best-seller:
The Hidden Life of Trees. He claims that "forests are like super-organisms with interconnections much like ant colonies" (or human societies). Mankind does not see the social life of trees because they communicate through their roots and use fungi to connect vast networks underground. Most important,
because trees live in a different, much slower, time scale, we just do not pay enough attention to their interactions. For trees, slow growth is a pre-requisite for good health and a long life. Humankind, who is clearly very young in the grand scale of life, was able to develop societies and find effective ways to communicate, just like ants and termites, (although much older, just like trees). So, why could not trees also evolve socially and create a "wood-wide-web" to ensure their survival by connecting with other living things? Remember that trees use insects (primarily bees) and birds to assist on their reproduction. Some even think that they may have induced mankind to develop agriculture as a way to expand their domination of the environment.