Finding the Best Heater for Your Small Greenhouse

As a dedicated gardener, you understand the importance of providing a nurturing environment for your plants year-round. But when the cold weather rolls in, your small greenhouse can quickly become an inhospitable place for your precious flora.

That's where a reliable greenhouse heater comes into play. In this guide, we'll explore the ins and outs of choosing the best heater for your small greenhouse, ensuring your plants thrive even in the chilliest of seasons.


  • The Importance of Heating Your Small Greenhouse
  • Factors to Consider When Choosing a Greenhouse Heater
  • Top Heater Options for Small Greenhouses
  • Conclusion

The Importance of Heating Your Small Greenhouse

Before diving into the world of greenhouse heaters, it's essential to understand why maintaining a consistent temperature is crucial for your plants' health and growth. Here are some key reasons:

Temperature Regulation: Most plants have specific temperature requirements for optimal growth. Inconsistent temperatures can stress your plants and hinder their development.

Frost Protection: Cold temperatures can lead to frost damage, which can be devastating to your plants. A heater helps prevent this by maintaining a stable and warm environment.

Extended Growing Season: With a heater, you can extend your growing season, allowing you to cultivate a wider variety of plants and enjoy fresh produce all year.

Disease Prevention:
Warm and humid conditions can promote the growth of mold and fungi. A heater helps maintain a drier, more controlled environment, reducing the risk of diseases.

Energy Efficiency:
While a small greenhouse might not require as much energy as a larger one, efficient heating solutions can still save you money on energy bills.

Now that we've established the importance of heating your small greenhouse, let's delve into the factors you should consider when choosing the best heater for your specific needs.

Factors to Consider When Choosing a Greenhouse Heater 

Greenhouse Size: The size of your greenhouse plays a significant role in determining the type and size of the heater you need. Measure the square footage of your greenhouse to calculate the heating requirements accurately.

Heating Capacity: Ensure the heater you choose has enough heating capacity to maintain your desired temperature. Consider factors like insulation, outdoor climate, and the lowest temperature you expect in your area.

Heater Type: There are various types of greenhouse heaters to choose from, including electric, propane, and paraffin heaters. Each has its advantages and disadvantages. Electric heaters are efficient and clean but may be costlier to run, while propane heaters are cheaper to operate but require proper ventilation.

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Safety Features: Safety should be a top priority when selecting a greenhouse heater. Look for models with features like overheat protection, tip-over switches, and proper ventilation to prevent accidents and ensure peace of mind.

Energy Efficiency: Opt for heaters that are energy-efficient to reduce operating costs. Look for heaters with adjustable thermostats and timers, allowing you to control when and how much heat is distributed.

Heating Method: Some heaters use radiant heat, while others rely on convection. Radiant heaters warm objects directly, making them more suitable for larger plants, while convection heaters heat the air and are better for smaller spaces.

Portability: If you plan to move your heater between different areas of your greenhouse or store it during the summer, consider a portable and lightweight option.

Budget: Set a budget for your greenhouse heater and try to find a balance between cost and quality. Remember that investing in a reliable heater can save you money in the long run.

Now that you have a clear understanding of what to consider, let's explore some of the best heater options for small greenhouses.

Top Heater Options for Small Greenhouses 

Electric Fan Heaters: Electric fan heaters are efficient and provide even heat distribution. They are perfect for small to medium-sized greenhouses. Look for models with adjustable thermostats and timers for energy savings.

If you want to learn more about greenhouse heaters with thermostat, visit our blog.

Propane Heaters: Propane heaters are an excellent choice if you're looking for an affordable heating option. They provide reliable heat but require proper ventilation to prevent carbon monoxide buildup.

Paraffin Heaters: Paraffin heaters, also known as kerosene heaters, are a cost-effective choice for small greenhouses. They are easy to use but should be monitored for safety and proper ventilation.

Infrared Heaters:
Infrared heaters emit radiant heat, warming plants and objects directly. They are energy-efficient and suitable for small spaces. However, they may not be as effective in extremely cold climates.

Ceramic Heaters: Ceramic heaters are compact and energy-efficient. They are a good choice for small greenhouses with limited space. They provide consistent heat but may not be as powerful as other options.

Oil-Filled Radiators: Oil-filled radiators are silent and efficient heaters that provide a steady source of heat. They are suitable for small to medium-sized greenhouses and are known for their durability.

Heat Mats and Cables: If you have a limited budget or need to target specific areas in your greenhouse, consider using heat mats or cables placed under seedlings or pots. These are energy-efficient and can promote healthy root growth.

Solar-Powered Heaters: For eco-conscious gardeners, solar-powered heaters harness the sun's energy to warm your greenhouse during the day. They may require a backup heat source for nighttime or cloudy days.


In the world of gardening, a small greenhouse can be a sanctuary for your plants, allowing you to nurture them year-round. To ensure your green space thrives, choosing the right heater is paramount. Consider factors like greenhouse size, heating capacity, safety features, and budget when making your decision.

Remember that maintaining a consistent and suitable temperature is essential for your plants' health and growth. Whether you opt for an electric fan heater, propane heater, or another heating solution, make sure it meets your specific needs and provides a comfortable environment for your plants to flourish.

With the right heater in place, you'll be well on your way to enjoying a year-round bounty of beautiful blooms and fresh produce in your small greenhouse. Happy gardening!

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