![](https://image.tmdb.org/t/p/original/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)
![](https://image.tmdb.org/t/p/w342/5O6yMOGWqfJX0TWHahai4nR8z3i.jpg)
Talking trees
Just like humans and other animals, plants need to communicate, particularly when they are under threat. But although these chemical defense mechanisms might save them from being eaten, it uses up vital energy that could otherwise be used for growth.
![](https://image.tmdb.org/t/p/w300/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)
![](https://image.tmdb.org/t/p/w300/eIHXl4rbMtuyTSDl6WBPyZVzPvD.jpg)
![](https://image.tmdb.org/t/p/w300/uRM8vPQUhqsAGc834IgmffWxUuL.jpg)
![](https://image.tmdb.org/t/p/w300/rE2CWaVegs71lW8OSeOti3rh61P.jpg)
Other episodes for this season
![Plant wars](https://image.tmdb.org/t/p/w300/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)
![The animals strike back](https://image.tmdb.org/t/p/w300/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)
![Talking trees](https://image.tmdb.org/t/p/w300/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)
![Dangerous to delicious](https://image.tmdb.org/t/p/w300/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)
![Weapons of the future](https://image.tmdb.org/t/p/w300/s4vlHqP5efHYh3nOFfOfTKclY1L.jpg)