Outdoor planters made from wood, concrete or terra cotta may be enhanced by tiles and colorful glass stones. Decorating outdoor planters with tiles and stones requires the right adhesive for the job. Bring new life to an old wooden planter with a mosaic tile design or cover an inexpensive terra cotta planter with river rock to add rustic charm. Decorating planters requires patience; one side must dry completely before you move on to embellish the next side.
Clean the outside of the planter with an appropriate cleaning solution to remove any dirt, oil or debris. For example, use a concrete cleaner on concrete planters and wood cleaners on wood planters. Allow the planter to dry completely after cleaning.
Place the planter so that one side is facing up on a flat, level work surface. Run a generous bead of waterproof construction adhesive along one section of the planter.
Press the flat-backed cabochons into the adhesive. Glass cabochons are colorful stones in a variety of shapes and sizes available in many craft, discount and home décor stores. Select cabochons with flat backs as they will lie flush with the side of the planter.
Cover the side of the planter with the stones. Allow the adhesive to dry 24 hours.
Repeat Steps 2, 3 and 4 to decorate the remaining sides of the planter. Allow the adhesive to dry completely before flipping the planter and decorating another side.
Stand the planter upright. Decorate the rim by attaching more glass cabochons with waterproof construction adhesive. Allow the glue to dry completely before placing the planter outdoors.