Plant Growth Under Different Colors Of Light

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Last Updated on December 7, 2022

The effect of plant growth under different colors of the light spectrum plays a key role in how they flourish. As a grower, it is normal for you to want your plant to thrive beautifully, and supplying them with the appropriate colors of light is the way to go.

This is why you need to know the impact different colors of light have on the growth of your plant. In this article, we will enlighten you on how the various colors of light affect the growth of plants. So, read on to find out.

Plant Growth Under Different Colors Of Light

The varying colors of light have a tangible implication on how rapidly or slow your plants will develop. All green plants require either natural sunlight or artificial light that will switch on the chlorophyll that prompts nutrient production. This is done through the process of photosynthesis.

Light also plays a crucial part in the different growth stages of your plant’s life cycle. The energy from light is captured by the green pigment chlorophyll and this light is used to manufacture food for the use of plants.

The production of this food enhances the growth of plants thereby generating more plant produce. Now, what we want to know is do all the different colors of light generate the same amount of yield for the growth of plants.

Effect Of Plant Growth Under Different Colors Of Light

The color of light has a different spectrum and plants will assimilate each color but in different amounts. The absorption rate will determine how plants will flourish under each color.

Different colors of light come in different wavelengths and it is this wavelength that will determine how plants will take in colors of light. But have in mind that the more plants absorb light the more it boosts plants’ growth.

Blue Light

Blue light has a short wavelength and its energy potential is great. This light is known to enhance the growth of plants and it makes plants attain maturity more rapidly. It is particularly required during the early stage of the plant.

Blue Light

Blue light also assists in the manufacture of chlorophyll and it helps assimilates energy for the use of photosynthesis. They are great for germinating seeds or seedlings and young plants because plants will absorb a huge amount of blue light to grow. The blue light will also boost the growth of leaves, stems, and roots.

How Does Red Light Affect Plant Growth?

Red light has the longest wavelength when it comes to the color spectrum. It is great for plants’ growth but they are not so effective on their own.

So, they need to be combined with other colors especially blue light to yield excellent results. Red light is required for flowering and the combination with blue is great for the vegetative phase. Red light also assists in the breakdown of chlorophyll thereby encouraging more light and energy assimilation for plant development.

Far-Red Light

We also have far-red light and it has a very low wavelength which is closer to the infrared wavelength. If you want abundant yield, far-red should be used. Far-red will help accelerate the growth process of the plant every time they go into the nighttime state.

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Violet Or Purple Light

Violet with its short wavelength and higher amount of energy boosts the flavor and color of vegetables and fruits. This color will also boost the number of antioxidants present in plants.

How Does Yellow Light Affect Plant Growth?

Yellow light does not have much effect on plant growth and no significant plant benefits have been seen with yellow light.


Because plants are already green, green light is usually reflected by plants and thus does not have much effect on them. However, plants can assimilate just a little portion of green light for their photosynthesis process.

Ultraviolet Light

Ultraviolet light has been known to be detrimental to life forms, especially in too much dose. Therefore, the high intensity of UV light is as well detrimental to plant growth.

Ultraviolet Light

What Hormone Causes Plants to Grow Towards Light?

The hormone that ensures plant cells elongate and grows toward the sun is auxin. When light conditions are normal, auxins spread throughout the plant. When there’s more shade, auxins break down and move to the sunnier side.

Which Plants Can Grow in Artificial Light?

All plants can grow under artificial light. Sunlight has the perfect balance of wavelengths plants need to thrive, but this can be closely created with grow lights. Low-light plants do well under artificial light. If you have the right light, your plants will stay healthy!

Which Color of Light Bulb Would Be Least Useful for Growing Plants Indoors?

The least effective artificial light bulb is green. Plants are already green thanks to the chlorophyll pigment in their leaves. They need the light of different colors to help them achieve their growth goals.

You should use violet-blue grow lights for the best results. This color encourages chlorophyll absorption, helping plants photosynthesis and grow. Flowers are more likely to bud and bloom if you use red light.

How Do You Grow Plants With UV Light?

Growing plants with UV lights can be beneficial. UV lights can speed up germination and strengthen plants. You can use UV lights by hanging them over your plants and placing them at the sides of your grow room or tent.

How Long Should I Leave My Plants Under Grow Lights?

Plants typically need 14 – 18 hours of artificial light daily, depending on what you grow. A good rule of thumb is to keep plants under this amount of UV light if they need 6 – 8 hours of sunlight daily.

How Far Should LED Grow Light Be From Plants?

How far a LED grow light should be from a plant depends on its wattage. It’s best to keep 200-watt lights at least 12 inches from the top of your plants. Lights with an even higher wattage should be a minimum of 35 inches from the top of your plants.

Exposing your plants to too much UV light can harm them. Your plant cells will damage, resulting in bleached leaves. If overexposure continues, your plant could die.

It’s important not to misuse grow lights. Do enough research to ensure you know how it’ll affect your plants and how to properly use it.

How Much Are Grow Lights for Plants?

You should use at least 20 watts of grow lights per square foot of plants. To determine how much you need, divide your bulb wattage between 20. How much this amount of light will cost you depends on several factors. The brand, size, and type of light are a few.

You can expect to pay about $15 for white 100-watt grow bulbs. A 100-watt lamp can cost up to $40. Colored lights typically cost more. The price range for a 200-watt white, blue, and red panel light starts at $50.

I suggest shopping around and talking to a sales consultant at local stores selling grow lights. This will give you a better idea of what you need.

Conclusion On Does The Color Of Light Affect Plants Growth

We can now conclude that red and blue light has the most significant effect on plant growth.

With that said, we hope you now have an understanding of plant growth under different colors of light. Ensure you are enlightened on how light intensity affects plants’ growth and yield.


How does different colored light affect plant growth?

Different colored lights can be used to control the growth of plants. Different types of lights are used to stimulate plant growth. They can be used indoors or outdoors. The lights can be used to control the growth of plants in a greenhouse, indoor garden, or outdoor garden. Colored lights are used to improve the growth of plants. The lights may be used to control the growth of plants indoors or outdoors.

The lights may be used to control the growth of plants indoors or outdoors. A white light is used to stimulate growth. The light stimulates photosynthesis. A white light is also used for colorizing the plants. Red light stimulates growth and promotes root development. It also improves the production of chlorophyll. It also reduces the growth of harmful bacteria. Blue light is used to promote flowering. It also helps to regulate circadian rhythms. Yellow light increases the production of sugar in the plants. It also improves the production of chlorophyll. It also stimulates the growth of root hairs. Green light is used to promote plant growth. It also controls the growth of weeds and pests. It also stimulates the formation of chlorophyll. Green light is used to control the growth of weeds and pests. Orange light is used to promote root growth. Orange light is also used to stimulate the production of chlorophyll.

What color light produces the most flowers?

Plants grown under red light grow and bloom more quickly than plants grown under blue or green light, which means that they produce more flowers. In addition, plants grown under red light have a greater number of leaves. Plants grown under blue light grow and bloom slower than those grown under red light, but they produce fewer flowers.

What should I consider when choosing a color light for my plants?

Here is a list of things to consider when deciding on a plant light:

What color of light do you want? What kind of plants do you have? Do you have a limited budget? How much time do you have to spend on your plants? Are you able to access the sun at any time during the day? (Many indoor plants like to have some direct sunlight, and some indirect light.) If you can't get direct sunlight, what kind of artificial lighting is available to you? Do you have a window that can be opened to allow in light? Do you have plants that require high levels of light? (This can mean that you will need to use high-intensity lamps). If you have a large number of plants, how much space do you have for lights? Is it easy to move your plants around, and would you like to be able to move the lights with the plants?

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