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How Much Warmer Is A Plastic Greenhouse Than Outside?

How Much Warmer Is A Plastic Greenhouse Than Outside

There are several factors that affect greenhouse temperature. One of these is insulation. This keeps the greenhouse warm even if the outside temperature is freezing. Another factor is ventilation. If you have a greenhouse with poor ventilation, plants can’t grow as well as they would if they were outside. Luckily, there are several ways to improve the quality of your greenhouse and keep it comfortable year-round.


One of the best ways to provide ventilation to a plastic greenhouse is with a fan. Installing a ventilation fan on the back wall of your greenhouse will allow the air to circulate throughout the whole space. Make sure to select a fan with a waterproof housing and an air-activated vent. You can install the fan in an open or closed configuration. The fan’s open position will blow air into the greenhouse, while the fan’s closed position will circulate air. When you install a ventilation fan, you should choose one with a sufficient air-flow rating for your greenhouse’s floor area.

Another way to provide ventilation to a plastic greenhouse is to place multiple vents. These vents can be placed on opposite sides of the greenhouse to maximize air exchange. This method can also be used with an evaporative cooling pad.

Frost fabric

One way to ensure that frost-resistant plants grow in a plastic greenhouse is to use frost-free plankets. These fabrics are easy to install and remove, and trap warm air to protect plants. Many of them are breathable, so they are not only light-weight, but easy to maintain.

There are several different types of frost blankets available. You can either buy a commercial frost protection blanket or make your own. Both options have their advantages, but a commercial frost blanket is often easier to use. If you don’t have a lot of cash to spend on frost protection, you can also use a canvas drop cloth. Although they won’t provide the same protection as other materials, they can keep plants warm and prevent frost damage quickly. A downside to using canvas fabric is that it is breathable and will break down when the temperature rises.

Solar-powered greenhouses

The temperatures in solar greenhouses are significantly warmer than those outside, thereby boosting the growth of spring and fall crops. The internal temperature of solar greenhouses can rise to 16 degrees Celsius at noon and rarely dip below 8 degrees Celsius by daybreak. This makes the greenhouses warmer than outside, and this difference is particularly noticeable in southern Liaoning Province, China, where air temperatures are coldest during winter.

Solar rooms are often built as a wood-framed addition to a house. They are compact and have large exterior walls and windows, making them ideal for growing food and flowers. The soil temperature needs to be warm in order to support successful plant growth. This can be achieved through a combination of multiple layers of glass and circulation of warm air.


Using bubble wrap can help insulate a plastic greenhouse. It is relatively inexpensive and easy to install. Bubble wrap can also be used to cover individual plants. Make sure to use bubble wrap that has larger bubbles. It is also important to keep the windows clean and dry. These two steps should help in keeping the temperature within the plastic greenhouse within the recommended range.

Foil-faced Styrofoam can be used in small greenhouses. It is generally used in home construction and comes in 4-x-8-foot panels with a 1/2-inch (1.25-cm) thickness. It can be attached to the knee wall or clipped or woven between the greenhouse’s frame. This insulation will last a few seasons.

Insulating a plastic greenhouse

If you’re growing plants indoors, the first step to insulating your greenhouse is blocking drafts. Use blankets, thermal insulation foil, or thick, opaque materials. These materials will prevent light from penetrating the greenhouse during the day and keep it warmer at night. If your climate is particularly cold, you may also want to insulate the greenhouse with bubble wrap.

Foil-faced Styrofoam is another inexpensive option for insulating a plastic greenhouse. It comes in four-foot-square panels with a 1/2-inch (1.25-cm) thickness and is perfect for a small greenhouse. It’s also lightweight and non-toxic. The foil can be cut to fit the frame and kneewall and can be placed in the greenhouse for several seasons before needing replacement.