Figure 1.

Spectral wavelengths affecting decorative traits of ornamental plants. (A) Blue, far-red, and red lights are typically effective in promoting flowering in long-day (LD) plants, whereas growth extension in short-day (SD) plants is promoted by using supplemental illumination at the end of the day with far-red light. (B) Blue radiation in a red background limits extension growth and promotes branching. (C) Stem elongation is regulated by controlling the shade avoidance phenomenon, using a lower R/Fr ratio or higher red percentage in a blue-light environment. (D) The vase life of cut flowers is improved when stored in a cold room and exposed to a sole source of blue light.