Blue Roses do not exist in nature as a result of genetic limitations. White roses have been dyed blue. In 2004, researchers used genetic modification to create roses that contain the blue pigment delphinidin.
Constance Spry roses. Shrub. Double cup-shaped blooms are a luminous soft pink. Myrrh fragrance. Often grown as a climber, the sprawling plant reaches 4-8 feet tall and wide. Not a true repeat flowering rose, but the boom cycle is long, stretching well into the summer months. Zones 4-9. RIR=8.5.