Dutch florist, Peter de Werken is the inventor of a trade secret process for creating rainbow roses. The picture says it all. The flowers are treated with natural pigments into their stems, so when they grow each petal has a different color. The flowers are sold under the name of rainbow rose or happy rose and are only available as cut or dried flower arrangements.
The Happy Roses Company describes the process in the following way, "Roses are placed in special water. Different substances are dissolved in this water. The rose branch absorbs this water as part of a natural process. This is what changes the color of the petals. What makes Happy Roses unique is that the inventor has managed to color a few petals, for example, yellow, whilst at the same time other petals color differently, for example, blue, orange or lilac." The whole process takes 12 to 24 hours. BTW Did you know that the very first plant patent was for a climbing rose?
Photo courtesy of Rainbow Rose Company