Trees and shrubs in country design often play a dual role by not only adding beauty, but also providing a function. They provide shade, fruit and privacy.
Native perennials are the backbone of a proper country garden. Popular choices include purple coneflower, shasta daisy, black-eyed Susan, ferns, hosta and roses. Group perennials in threes or fives to provide masses of colors, and use plants over and over for a continuity from bed to bed.
Annuals can add a punch of color for little cost. A package of cosmos seeds costs around a dollar and provides dozens of plants. Self-seeders like pansies, Johnny-jump-ups, viola, sweet alyssum, snapdragon, and petunia bring surprises year after year, because you never know where those seeds will land. Plant peas, scarlet runner beans, nasturtium, and sweet peas to climb fences and other structures.