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How does putting my plants in a greenhouse help them grow? Is it purely to shield them from cold weather, or are there other benefits?

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up vote 21 down vote accepted

There are several benefits of a greenhouse:

  • accumulation of heat from the sun

  • possibility to regulate temperature and humidity

  • Protection from wind and excessive rain

  • protection from unwelcome pollens

  • limited protection from pests especially birds.

Typically you put in a greenhouse plants that prefer a warmer climate than the local one.

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Primarily, greenhouses trap heat and moisture.

Most plants prefer things warm and damp, so it's an ideal environment for growing fruit and germinating seeds.

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Green houses can extend your growing season, and even allow you to grow throughout the year.

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