Bring a touch of nature to your garden walls by creating seashell wall planters. Find large seashells with a concave shape that can hold soil and plants. Clean the seashells thoroughly and drill small drainage holes in the bottom. Fill the seashells with potting soil and plant small succulents or other low-maintenance plants. Attach the seashell planters to your garden walls using strong adhesive or hooks. The seashell wall planters will add a unique and whimsical touch to your garden, showcasing the beauty of both the seashells and the plants.