Abstract: A detachable, adjustable plant container support for supporting a plant container alone or with a planting medium and plants on a vertical surface such as a wall, a post or tree. The plant container support comprises a wall bracket which can be permanently secured to a vertical surface and a plant container holder which is detachably supported on the wall bracket. The plant container is adjustable to support plant containers of various widths and heights. The plant container holder has a upper bracket for supporting the upper lip or edge of the container and a base member for supporting the base or bottom of a plant container.