Why Roses Can’t Be Blue

Like any other flower, the color of a rose is based on which color wavelengths are absorbed and which ones are reflected back. The color reflected back is the color you see. The flower must have the pigment necessary to reflect back the wavelength for red light. Roses don’t naturally occur in the color blue because they lack the pigment. No amount of breeding or hybridization of roses can result in a true blue rose. There’s simply no gene for blue. There are, however, Japanese companies, that genetically manipulate blue roses by inserting the blue gene from a pansy and iris into a red rose. So far, the rose is more of a purple rose than blue. For certain occasions, where blue is a necessary color, florists will cut white roses and spray them with blue floral paint and place the stems in water dyed blue.