Red light and blue light are very different. So which is best for plant growth? The answer to this isn’t so simple, which is why light quality, the color of the light, is so important. In nature plants receive pure sunlight, which is made up of all the colors. But the three main colors are red, blue, and green light.
So what about green light? Plants are green because they reflect green light, and we see that light. So we know that green light does very little for plants.
That leaves red & blue light for us. Both of these are important for plants but for different reasons.
Blue light is connected to a plant’s chlorophyll production, which is important for photosynthesis. Blue light helps plants grow strong and healthy.
Red light is needed to make the plants flower, which also leads to fruit. It’s also important in the plant’s germination and early growth.