How To Heat a Greenhouse in Winter For Free

Heating a greenhouse in winter can be an expensive and energy-intensive process. However, there are several ways to harness free sources of heat to keep your greenhouse warm without breaking the bank.

Heating a greenhouse in winter can be a challenge, especially if you want to do it without spending a lot of money. However, there are several ways to heat a greenhouse for free or at a low cost. Here are some options:

  • Use the sun: The sun is the most obvious and cost-effective source of heat for a greenhouse. Make sure your greenhouse is properly oriented to receive maximum sun exposure. This means facing the greenhouse south in the Northern Hemisphere and north in the Southern Hemisphere. Also, ensure that the windows and roof are clean to allow maximum light penetration.
  • Insulate: Insulating the greenhouse can help retain heat and keep the plants warm. Use materials like bubble wrap, blankets, or even hay bales to insulate the greenhouse walls and floor. You can also use a layer of mulch to keep the soil warm.
  • Compost: Composting can generate a significant amount of heat, and you can use this heat to warm your greenhouse. Build a compost pile in or near your greenhouse, and the heat generated from the decomposing materials will warm the surrounding area. This method is known as hot composting.
  • Use water barrels: Water has a high thermal mass, which means it can absorb and release heat slowly. Place water barrels inside the greenhouse and let them absorb the sun’s heat during the day. At night, the water will release the stored heat, helping to keep the greenhouse warm.
  • Heat from animals: If you have livestock, consider placing them in a shelter attached to your greenhouse. The heat generated by the animals can help keep the greenhouse warm.
  • Install a wood-burning stove: Set up a properly ventilated wood-burning stove in your greenhouse to provide heat. Load it with seasoned firewood and maintain a controlled burn to regulate the temperature and keep your plants warm. If you can buy one rick wood, You can use it for one month. Depend on temperature and greenhouse size.

How To Use Heater in Green House

Heaters are a crucial component of greenhouse operations, especially during cold weather conditions when temperatures drop below optimum levels for plant growth. The use of heaters in greenhouses helps to maintain the desired temperature range for plants, which promotes optimal growth and yield. To use a heater in a greenhouse effectively, it is essential to consider several factors, including the size of the greenhouse, the type of heater, and the location of the heater.

The first step in using a heater in a greenhouse is to determine the appropriate size of the heater. The size of the heater needed depends on the size of the greenhouse and the temperature range required. A good rule of thumb is to use 1,000 watts of heating capacity for every 100 square feet of greenhouse space. This ensures that the greenhouse is adequately heated, and the plants are comfortable.

The second step is to choose the right type of heater for the greenhouse. There are various types of heaters, including electric, gas, and oil-fired heaters. Electric heaters are popular because they are easy to use and require little maintenance. Gas and oil-fired heaters are also effective, but they require more maintenance and are more expensive to operate. The type of heater chosen will depend on the specific needs of the greenhouse owner, such as cost, essential oils, and maintenance requirements.

The third step is to place the heater in the right location in the greenhouse. The heater should be positioned in a way that allows for optimal air circulation and heat distribution. The best location for the heater is typically at the opposite end of the greenhouse from the entrance. This ensures that the warm air circulates evenly throughout the greenhouse and keeps the plants at a consistent temperature.

How To Create Small GreenHouse Heating System

A small greenhouse heating system is essential for maintaining a warm and stable environment for your plants. The first step in creating a heating system for your greenhouse is to choose a heating method. Some common heating methods include electric heaters, propane heaters, and hot water heaters. Electric heaters are easy to install and use, while propane heaters provide more heat but require more maintenance. Hot water heaters are another option that can be used with radiant heating systems.

You have chosen your heating method, you will need to consider insulation. Insulation is crucial for keeping the heat inside the greenhouse. You can use bubble wrap, fiberglass, or polycarbonate panels to insulate the greenhouse. It is also essential to seal any gaps or cracks in the greenhouse to prevent heat from escaping.

You will need to install a thermostat to regulate the temperature inside the greenhouse. A digital thermostat is ideal because it can be programmed to maintain a specific temperature range. You can also install a fan to circulate the warm air inside the greenhouse.

To distribute the heat evenly throughout the greenhouse, you can use a radiant heating system. This involves installing heating coils under the greenhouse benches or in the soil. The coils are then connected to the heating source and thermostat.

What is the cheapest way to heat a greenhouse?

Using passive solar heating methods such as insulating the greenhouse, using double-glazed windows and adding thermal mass can be the cheapest way to heat a greenhouse. Another option is to use a small electric heater or a low-cost propane heater.

How can I heat my greenhouse naturally?

Two natural ways to heat a greenhouse are by using passive solar heating techniques such as south-facing windows and thermal mass, or by using renewable energy sources like solar panels or a wind turbine to power a heating system.

What is the best way to heat a greenhouse in winter?

The best way to heat a greenhouse in winter is by using a heating system that utilizes renewable energy sources such as geothermal or solar energy. Another option is to use a propane or natural gas heater, but these can be more costly and less sustainable.

Do you need to heat a greenhouse in winter?

Heating a greenhouse in winter is necessary to maintain a warm and stable environment for plants to grow. The amount of heating required depends on the type of plants grown and the outside temperature.

How To Heat a Plastic GreenHouse

Heating a plastic greenhouse can be done using various methods depending on the size of the greenhouse and the temperature requirements of the plants. One common method is to use electric heaters, which can be portable or wall-mounted, and are available in different wattage and size options. These heaters are easy to install and maintain, and they provide a controlled and reliable source of heat. Another option is to use propane or natural gas heaters, which can be more cost-effective for larger greenhouses but require proper ventilation to avoid the risk of carbon monoxide buildup.

Another way to heat a plastic greenhouse is to use a system of hot water pipes or radiant heat panels that circulate warm water or air throughout the space. These systems are more complex and expensive to install, but they provide a consistent and energy-efficient source of heat that can be adjusted to meet the specific needs of the plants. Additionally, using insulation such as bubble wrap or thermal curtains can help retain heat and reduce energy costs.

It’s important to monitor the temperature inside the greenhouse regularly, as overheating can be just as damaging as underheating. Installing a thermostat and a thermometer can help maintain a stable temperature and prevent damage to the plants. Also, it’s important to remember that plants need ventilation to thrive, so ensuring proper ventilation is crucial for maintaining a healthy growing environment.


There are several ways to heat a greenhouse in the winter for free or on a budget, such as using passive solar heating, insulation, and thermal mass. However, if these methods are not sufficient, a heater can be used in conjunction with these techniques to maintain a comfortable temperature for plants. When creating a small greenhouse heating system.

It is important to consider the size of the greenhouse, the type of plants being grown, and the climate of the region. For plastic greenhouses, insulation and proper ventilation are key factors to consider when using a heater. Overall, a combination of these methods can help reduce the cost of heating a greenhouse in the winter.