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Do plants grow faster in dark or sun?

Updated: 8/11/2023
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11y ago

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Plants require light for photosynthesis, so it is impossible for plants to increase in dry biomass without any light.

Some plants do not require high levels of light for growth, because they are adapted to low light conditions (such as jungle and forest plants).

Plants left in the dark will grow taller than plants in lighted conditions over a short period of time, but they will also be yellower and more spindly (etiolation). The increased height is a response to low light levels - the plant is trying to grow over anything that may be blocking the light, and will grow towards any source of light.

As mentioned in the discussion page of this question this response is controlled by auxins in the plant growth points.

For very short periods of time the plant will appear to be going faster than a control plant in normal light intensities - however, this is because the stem is normally thinner so the amount of biomass produced is roughly the same. In addition the plant has to make use of stored energy reserves as it is not able to photosynthesis.

Etiolation is a form of self-protection mechanism, the plant expends energy and reserves looking for a source of light that can ensure its continued survival.

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11y ago
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13y ago

yes it can grow faster in the dark because i am planting my flowers in a dark place but you have to keep watering it so it can grow. maybe not all plants grow faster in the dark there is certain kind of plants that can. if you dont take care of it it will not grow how you want it to grow.

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15y ago

Plants are designed by nature to grow at night that is they use O2 and some of the energy they convert from the sun to grow, in the daytime they are designed to concentrate on using photo synthesis to produce energy foods. starch and sugars.

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15y ago

plants grow faster in the right amount of sunlight. (not too much)

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14y ago

In the light. Plants need light energy from the sun to go through photosynthesis, which is how plants produce the energy and nutrients they need to grow.

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12y ago

A plant can grow in the dark . You might wonder why because it grows very tall and brown and weak looking because its growing so it can find sun light to live that's how it grows in the dark.

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11y ago

Plants grow faster in the sun. They cannot live without it.

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14y ago

No, plants need light to live and grow.

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Q: Do plants grow faster in dark or sun?
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