How Light Color Affects Greenhouse Plants

How Light Affects Plants Greenhouse Gothic ArchLight is essential for plants to survive, but the color of that light can have a significant impact on how they develop.

With the help of LED grow light technology, multiple experiments have been conducted to determine how plants react to light when exposed to different colors of the spectrum in terms of height, weight, color, texture and more.

Additionally, colored shade cloths can have the same effect on plants, and colored films are being used on the growing areas of the International Space Station as well!

Below is the general performance of plants when exposed to a particular color of light:

Ultraviolet: Prolonged exposure to UV light can be harmful to plants, just as it is to humans. A study confirmed that when UV light exposure is eliminated, plants experience enhanced growth.
Violet: Violet light exposure has been found to intensify the color, aroma and taste of plants. It also improves the antioxidant functions of plants, which naturally helps prevent cell damage.

Blue: The most influential of all hues, blue light has the most powerful effect on plants. It encourages plants to accept more energy, reduces their water loss, and increases their growth and maturity rates. At least a minimal intensity of blue light is needed indoors for normal plant growth. In general, plants grown under blue light are shorter and have darker, thicker and greener leaves than those not exposed to blue light. These attributes may be desirable when growing ornamentals, for example.

Green: Not surprising, since most plants are green, this color has the least effect on a plant’s growth. Green light does, however, enhance the production of chlorophyll and gives plants a greener color. Yet, some research indicates green light can have positive effects on growth and flowering. That is impacted by the intensity of the green light, whether any other colors and intensities are present and the type of crop.

Yellow: Because yellow isn’t far off from green in terms of wavelength, it also doesn’t have much effect on plants. It has no influence on photosynthesis and, as a result, growth is reduced.

Red: By itself, red light can help plants yield more leaves than blue light alone. But together, the combination of red and blue significantly improves plant growth, making it an optimal choice for development.

Far Red: Like red light, far red light plays an important role in plant development. Specifically, far red light affects germination and flowering. Essentially, this light encourages flowering because plants require less time in darkness.

Green light does play an important role in gardening, particularly as it relates to people. Without the presence of green light, plants do not appear green to the naked eye. Not only is green light needed to reduce eye strain for employees, but also it helps more easily detect any problems or pest issues. The good news is that white LEDs combine green, red and blue light, which provides the benefits of all three colors.

Questions about light in your greenhouse or other growing settings? Let us know! When you call Gothic Arch Greenhouses at 800-531-4769, you’ll always get a friendly representative ready to help you. You can also visit our website at www.GothicArchGreenhouses.com for more information as well.