Country Romance Mix Hollyhock Seeds and Plants at Burpee.com... This is the old-fashioned perennial hollyhock that is so hard to find. Try it along a fence or plant with verbascum for a special look. A blend of rose, white, maroon, yellow and pink, large 3-5" single flowers are produced abundantly on stalks 5-7 ft, July to September. Grows best in full sun.