I have this doubt in mind for quite long now. I read a few articles on this and none of them actually give a concrete answer to my query. As you know nowadays we started realizing the bad effects of plastic on us and trying to minimize its use. In many places there are strict laws in place to cut down / stop its usage. But is it healthy to grow vegetables and other plants on plastic containers? What I came to know from my reading is that it doesn’t have any effect on the plants we grow, except plastics with numbers more than 5. There is a number printed on plastic containers (usually at the bottom part) that denotes of the quality of plastic material used. So containers with numbers from 1 to 5 are usually safe to use as a planting medium. I am curious to know more about this.