Plant pockets in the pond's initial excavation provide places for lilies to grow and eliminate the need for unsightly pots. Plant pockets, around six inches deep and filled with soil promote health in plant development by allowing the roots to spread through the surrounding gravel unlike containerized plants, which can quickly become root-bound. Marginal plants do not need pockets and are rooted directly into the gravel substrate of the pond. Eliminating plastic pots helps complete the natural look of our water features.