why do plants need sunlight to grow

Light is something that sustains all life on this planet, but we may wonder why do plants grow with light? When you buy a new plant, you may wonder what kind of light do plants need? Do all plants need the same amount of light? How can I tell if my plant is having problems with too little light? Keep reading to answer these questions on how light affects the growth of a plant. All things need energy to grow. We get energy from the food we eat. Plants get energy from light through a process called.

This is how light affects the growth of a plant. Without light, a plant would not be able to produce the energy it needs to grow. What Kind of Light Do Plants Need? While plants need light to grow, not all light or plants are the same. If someone asks, What kind of light do plants need they may be referring to the light spectrum. Plants are affected by light that falls into the blue spectrum of the light scale.

and grow lights all have blue tones in them and will help provide the light your plant needs. Incandescent and halogen lights are more red and will not help your plant grow. The question, What kind of light do plants need may also refer to time needed in light. Normally they are referred to as /shade, /part sun or /full sun plants. Low or shade plants may need only a few hours of light a day while high or full sun plants need eight or more hours of light a day.

Sometimes a plant will not get enough light and will have problems with too little light. Plants affected by light shortages or too little blue light will have the following signs: The sun, a torch, and a light bulb all emit energy in the form of particles called photons. The photons from the sun are a product of thermonuclear fusion. A torch uses a chemical reaction to burn. A light bulb converts electricity to photons. But a photon is a photon and light is light whether it comes from the sun or a flashlight.

Vastly more energy comes from the sun than from any artificial light. But the light from the sun is different from a street lamp another way: most artificial light doesn t emit as much energy in the red and blue region of the light spectrum as sunlight does. In other words, different ratios of reds, yellows and blues all combine together to make up white sunlight. Researchers can successfully grow plants using only artificial light in growth chambers.

But sunlight is best for most plants. It s generally more intense than artificial light, and it s pretty equally distributed among the different wavelengths that earthly plants have evolved to like best. And there s another difference between lamps even grow lamps and sunlight. Grow lamps need energy to light up. Sunlight is unlimited and free. Our thanks to: Chicago, IL Logan, UT