Tips to Decorate Your Botanical Garden Wedding : A botanical garden serves as a romantic and naturally beautiful setting for a wedding. Rather than spending thousands of dollars on flowers, brides and grooms can take advantage of the floral landscape of the botanical garden. This serene setting, then, has become popular among couples looking to exchange vows outdoors. Despite the natural beauty of a botanical garden, couples want to add a personal touch to their wedding locale by adding decorations. Using the botanical garden as inspiration, couples can create memorable wedding décor.