Perennial flowers are blooming plants that come back year after year. This is in contrast to annual flowers that must be planted anew every spring. If you are just planning your garden, or adding to an existing one, plant a fair amount of perennials. When spring rolls around, you can plant some bright annuals to fill in the bare spots of your landscaping.
The daylily is sometimes referred to as the perfect perennial flower. It works in most landscapes, with minimal care. It's a drought resistant plant that grows well in many hardiness planting zones--3 through 10. This long-blooming perennial (late spring until fall) can be found in many colors except white and true blue, most commonly yellow, pink, red, purple, melon and pink. These colors can be found mixed in various patterns, within a variety of forms, such as circular, triangular, star and ruffled. These varieties come in three sizes: miniature, small and large. Choose daylilies with various blooming times to enjoy them throughout the season. Plant your daylilies where they will get at least 6 hours of sun per day. This perennial prefers a well-drained soil, but not too sandy. Add compost to your soil, as it will amend a soil that has too much sand or too much clay.
Related to the sunflower, asters look more like daisies. It's a good perennial choice for your garden, as they come in many colors and are easy to care for. The Blue Autumn is a new variety, gaining quick popularity because of its rich blue color. It grows to a height of 12 to 20 inches. It loves the sun, growing best in hardiness plant zones 3 through 8. Make sure you give your asters a well-drained soil. Planting them in a heavy clay soil, where water will collect around the roots, can cause root rot. Some other popular varieties of asters are Albus (white petals with a yellow center), Goliath (soft blue), Happy End (various shades of pink) and Dark Beauty (violet blue).
There isn't a flower, perennial or annual, that rivals the simplicity of the daisy. This perennial has long stems, creating a 1- to 3-foot-tall plant. The lovely bright petals will grace your garden in June and July. However, in very warm climates you may see them continue to bloom into October. Plant a few extra plants for cutting. The Shasta Daisy will last up to 10 days in your flower vases. It loves a full-sun location, but will grow in just about any type of soil conditions. It flourishes, however, in hardiness plant zones 4 through 9. You will find slight variations in varieties, such as Alaska, Becky, Broadway Lights, Crazy Daisy and Little Princess.