Switch up your garden decor with seasonal displays using vintage watering cans as planters. Fill them with seasonal flowers and foliage to celebrate each time of the year. In spring, plant tulips, daffodils, and hyacinths for a burst of color. In summer, opt for sunflowers, cosmos, and zinnias. In fall, choose mums, asters, and ornamental grasses. In winter, fill the watering cans with evergreen branches, holly berries, and pinecones. This versatile idea allows you to showcase the beauty of each season in your garden.