In the height of summer, the blazing sun beats down and a cloudless sky can send you running for the shade of the nearest garden. However, if you're confronted with a landscape of bright yellow and red flowers, you may feel like you're still set on broil. That's where blue to purple perennial flowers come in handy. They can turn down the heat by highlighting the cool end of the spectrum.
Blue to purple perennials aren't just for summer. There are flowers that can be arranged to bloom throughout the seasons, and with only some basic care and maintenance from you. You should consult your local garden center to find the perennials that are right for your climate, but the following list should give you some ideas on how to give your garden a cool accent.