The evidence for plant communication is only a few decades old, but in that short time it has leapfrogged from electrifying discovery to decisive debunking to resurrection. Two studies published in 1983 demonstrated that willow trees, poplars and sugar maples can warn each other about insect attacks: Intact, undamaged trees near ones that are infested with hungry bugs begin pumping out bug-repelling chemicals to ward off attack. They somehow know what their neighbors are experiencing, and react to it.
Tree talk may not take the form of the way humans talk to each other, but there is a lot of evidence already that trees and plants respond to outside stimuli. Given the way humans evolved, it is not out of the realm of possibility that trees can also communicate in a way that supports the species.
Trees may not talk to one another the same way humans do, but they certainly have some form of communcation that can help them share nutrients. It has long been understood that trees and other plants are able to respond to music, and it would not be totally unheard of that they could communicate.
Yes, there is enough science to support the idea that trees can communicate amongst each other. While there will be many more studies to come, it appears that trees use a variety of techniques to "talk" to each other as a community. They do not use words, but a variety of techniques that most humans will not understand until the research is perfectly clear.