Do Different Color Lights Affect Plant Growth
Plants need light to grow, but not all colors of light are equal. Recently I was surprised when my daughter told me that the color of the lights we use in our homes affects how plants grow. I had never heard about this before and decided to do some research. The following paragraphs will explain why plants need light, what colors make up white light, which colors help and hurt plant growth, and how you can test this effect yourself.
Why do plants grow?
For plants to grow, they must absorb light. Plants absorb carbon dioxide (CO2) as well. To do this, they need water and nutrients. These nutrients help them reproduce and survive in their environment.
Plants also need to live because they are alive!
What color is the Sun?
The Sun is a star. It is a yellow dwarf star, which means that it’s medium-sized and has a low mass. It’s also the closest star to Earth. The Sun itself is actually in the main sequence stage of its life cycle, meaning it’s burning hydrogen into helium like our other stars do. As such, it has an estimated age of 4.6 billion years (give or take).
The Sun is also classified as being a G2V star—this means that its surface temperature falls between 5800K and 6000K (in Kelvin), with an effective temperature around 5780K; this puts it just below an A0V classification on the Harvard system used to classify stellar temperatures from hottest to coolest.
What are the effects of different color lights on plant growth?
- Red light: The red spectrum is one of the most visible colors to humans, so it can be said that plants are “red blind.” Plants only need a few minutes of red light per day to thrive.
- Blue light: Much like red, blue is also visible to humans but doesn’t have as much effect on plant growth. However, because it is more highly visible than other wavelengths of light in our atmosphere, blue may be more effective at encouraging photosynthesis than other colors.
- Green light: This one’s pretty obvious—green lights are usually associated with photosynthesis! Studies have shown that green lights promote plant growth when used for long periods of time (at least 24 hours).
How to test the effect of light on plant growth
To test the effects of light on plant growth, you will need to use different colors of light. It’s best to use a range of colors, including red and blue. You can also test the effect of different intensities and wavelengths—the frequency at which electromagnetic radiation oscillates.
On average, blue light is more energetic than red light, so it has more ability to promote photosynthesis in plants. However, this doesn’t mean that all plants respond the same way to these different frequencies! In fact, some species may benefit from being exposed to only one particular color or combination of colors over others when they’re grown indoors under artificial lighting conditions like those found inside offices or homes with fluorescent bulbs installed throughout each room (which is what most people do).
Questions you can investigate
Here are some questions you can investigate:
- How do different wavelengths affect plant growth?
- What color lights are best for growing plants?
- What color lights are best for flowering plants?
- What color lights are best for plant growth in a greenhouse?
- What color lights are best for plant growth indoors?
Different wavelengths of light affect plant growth.
If you want to grow plants that are as tall as possible, then use blue light. If you’re growing a houseplant and don’t have much space, yellow lighting is best for small, compact growth. White light is ideal for most plants because it provides an equal amount of all wavelengths necessary for photosynthesis. The color purple can be used as an additional wavelength to help your plants grow more slowly or in extremely low-lit environments such as caves (where there is no light at all).
Red light causes plants to grow faster than any other color in the spectrum and can also increase resistance against disease and pests. However, red doesn’t have enough energy to make bigger leaves or stems so if you need a plant with these characteristics then use white or green instead!
Overall, we hope this article has given you a good introduction to the science of plant growth. If you want to dive deeper into this field and learn more about the effects of color on plant growth, we recommend reading some of our other articles about the science behind light. You can also start experimenting yourself! Start by looking around your house for sources of colored lights (like colored bulbs at Christmas time or different types of light bulbs in your kitchen). Try creating an experiment using these types of lights and measuring how well different plants do under each type—then, let us know what happened!