Is paint toxic to plants?
Similarly, you may ask, is paint harmful to plants?
"You can absolutely kill plants with paint," Conover said. Conover and Poole's experiments confirmed that even small amounts of mercury harm some plants and furthered their suspicions about other kinds of indoor pollutants.
In this regard, will paint kill a tree?
2 Answers. A tree has roots that may be going 20 or 30 feet or more under the ground. If not then the paint probably will not kill the tree. In addition the paint will pollute the ground water and kill all the insects, worms and other things that your garden needs to grow.
The problem with painting terra cotta pots, however, is that if you do not prepare your pot properly, your project will deteriorate quickly. Terra cotta, or earthenware, is a porous surface and clay. It will retain moisture. Retaining moisture is great for plants and outdoor use, but it is horrible for crafting.