The damaging effects of monoculture tree plantations are being resisted around the world. Timber plantations have occupied large tracts of indigenous and agricultural land and have been responsible for the loss of biodiversity and the pollution and depletion of water and soils. Such plantations are owned by large corporations with little concern for the surrounding communities or environment. Now, the addition of genetically modified (GM) tree plantations can only make the situation worse. This article argues that the development of GM trees needs to be stopped now.