Do Plants Need Darkness ?

Do Plants Need Darkness : People often overlook how much darkness your plant needs when they hear about plant care, but one of the main focus points is light and how much light you should give your plant.

How does darkness affect plants? Periods of darkness affect their metabolism as well as the amount of food they process (photosynthesis). They also use up the huge amount of energy they’ve stored throughout the day to grow.

Nevertheless, there are some plants that can survive in 24/7 light, although it will usually hinder their growth. A good example of this is the Shameplant, which withers away if it is kept in sunlight all the time.

Learn what actually happens during these dark periods to truly provide the best care for your plants. Check out the information to the right to get your bearings.

Why Do Plants Grow Taller In The Dark?

Many people find that their plants grow a little faster if they leave them in the dark for a long time. There are a variety of reasons for this, but one you want to avoid. It’s just not healthy at all.

One reason plants grow taller at night is they are utilizing the extra energy they have stored during the day and will not require light till it has been depleted.

However, you should not leave your plant in the dark for long periods of time in order to grow it larger. Although it may increase its size, your plant will be shorter, thin, and weak.

This happens as your plant will be trying to outgrow its neighbors in search of light, which is a natural survival mechanism that is embedded in their DNA.


Do Plants Grow Faster In The Dark?

Most plants certainly grow in the dark, so the growth rates aren’t altered if the plants’ regular light/dark cycles are changed accordingly, so most hydroponic systems do the same automatically.

But as they don’t need to use photosynthesis for energy at night, that does lend some credence to the notion that they grow faster in darkness since they’ve got more energy to squander.

Many people mistakenly believe that plants grow faster when they are with no light. This is actually the plants’ natural response to a lack of light: They grow upwards!

When plants are in desperate situations, they will grow straight up due to the lack of light, as a natural emergency response.

This isn’t speedier growth, it’s simply the plants elongated cells seeking a light source so they can begin photosynthesizing.

The mung bean is a popular example of a plant that grows much faster in darkness than in the light, while this is beneficial to mass producers, it is unhealthy for individuals.

Why Do Mung Beans Grow Faster In The Dark?

It’s not necessarily healthy mung beans that grow a great deal in the dark, sometimes they’re elongated and weaker than usual. But why do they grow faster in the dark?

Mung beans grow much faster in dim environments because they usually grow close to each other, making them extremely competitive for light. It’s part of their natural survival strategy to grow much faster in order to reach the light.

Although they tend to grow faster in complete darkness, you cannot leave them in complete darkness for the rest of their lives as they will die. Mungbeans need light, like all plants, to produce food.

Why Do Plants Take In Oxygen In The Dark?

Many people believe that green plants simply stop breathing once it gets dark, no longer requiring oxygen. Some people don’t know plants even use oxygen!

The plants that require oxygen at night do so because they use it for respiration (breathing) as well as for metabolic purposes. During the day in sunlight, they take in less oxygen as photosynthesis occurs, however at night, this process no longer occurs.

Are There Plants That Grow In Complete Darkness?

With the discussion about plants and darkness, you’re probably wondering if there are any plants that are able to grow in complete darkness.

Plants can only exist in complete darkness as they cannot produce food without sunlight through photosynthesis. 

There are some plants that can thrive in low light conditions, so twilight fans should not be too depressed. Take a look.


Low-Light Plants

  • Lucky Bamboo
  • Mung Beans
  • Snake Plants
  • Devil’s Ivy
  • Peace Lilies
  • Heartleaf Philodendron
  • Kentia Palm

Below are some low light plants which thrive indoors. These plants are perfect for office environments as they thrive in low light settings.


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