25.Delphinium
Some flowers are blue, and then there are blooms like these. Delphinium is a perennial flower that you can see in historic English gardens. Its magnificent spikes, which are covered in horn-shaped colors, add an old-fashioned touch to any garden bed.
Some alpine cultivars may grow up to six feet tall, making them suitable for a garden bed's back border. Delphinium blossoms are usually brilliant blue to violet, giving them a wonderfully striking sight, especially at their tallest.
