Nothing beats the sight of a blue garden flower. But not all blues are created equal. Some shades of this versatile color are more effective than others in making your garden pop. And while you can find blue flowers throughout the year, the summer months offer a wide variety of options for planting some of these brilliant blooms in your yard or garden. So take a look at our list below! Blue Hollyhock ‘Blue Boy’ Blue hollyhock (Alcea mollis) is a perennial that grows 2 to 3 feet tall, making…