Prep your garden for bold fall color by planting these 10 perennials in August. This zone-based guide covers what to plant now for blooms that last into autumn. Includes care tips, bloom timelines, and trusted affiliate picks for seeds and starter plants. Whether you're in Zone 3 or Zone 9, there's a reliable option for your yard. Discover top-rated products for every climate and enjoy fall color without the guesswork.