Discover the Ultimate Greenhouse Heaters for Year-Round Plant Protection

As a dedicated gardener, it’s frustrating seeing cold weather wilt your precious plants. Did you know that employing a greenhouse heater can help extend growing season and protect those delicate blooms from frost? This article will guide you through the ins and outs of selecting the best greenhouse heaters perfect for your plant sanctuary.

Let’s jump into this warm world to defend our green friends!

Here Are Our Top Greenhouse Guides:

Why Do You Need Greenhouse Heaters?

Greenhouse heaters are essential for protecting plants in cold weather, extending the growing season, and maintaining stable temperatures.

Protect plants in cold weather

Icy weather can spell disaster for even the hardiest of plants. With temperatures plummeting, frost formation poses a significant risk to their survival. Installing a greenhouse heater becomes crucial in this situation, being an excellent way to shield your plants from cold snaps and detrimental frost damage.

Not only does it keep the harsh winter at bay but also creates an optimal environment that promotes growth by maintaining accurate temperature regulation inside the greenhouse all throughout the year.

This approach doesn’t just protect your precious greens during colder months; it also extends their growing season, allowing thriving plants even when outdoor conditions are less than ideal!

Extend growing season

Using electric greenhouse heaters effectively extends the growing season. It allows gardeners to start planting earlier in the spring, even when outside temperatures are still low. Heat inside a greenhouse nurtures seedlings and helps them grow sturdy enough for outdoor planting.

Frost-sensitive plants thrive in this controlled environment during cooler months. With temperature range manipulation using efficient greenhouse heating systems, you can cultivate fruits, vegetables, and flowers usually impossible to grow off-season.

Greenhouse heaters provide the opportunity for year-round gardening by keeping your greenhouse warm during winter or frosty weather. The rewards of a bountiful harvest well into December make it an investment worth considering for many.

Maintain stable temperatures

Maintaining stable temperatures is crucial to the health of your greenhouse plants. Inconsistent temperatures can cause seasonal stress, damaging or even killing your plants. Greenhouse heaters come handy in maintaining this warmth and combating icy weather conditions.

An electric heater with built-in temperature controls allows you to set a desired room temperature effectively, providing reliable greenhouse heating for your indoor garden throughout the year. Digital thermostats offer precise control over the ambient room temperature while saving energy.

These features combined help keep your greenhouse warm and ensure tender plants thrive even in colder climates. Proper usage of propane or natural gas heaters along with adequate ventilation further reduces any chances of harmful fumes building up within the space ensuring a healthy environment plays its role in maintaining stable conditions all round.

Types of Greenhouse Heaters

There are several types of heaters available, including electric heaters, gas heaters, infrared heaters, and fan heaters.

Electric heaters (soil heating mats, 110/120 volt, etc.)

Electric heaters, including soil heating mats and 110/120 volt models, are a popular choice for greenhouse owners. These heaters provide reliable and consistent heat to keep your plants warm in colder temperatures.

See also  Commercial Greenhouse A-Z: The 19 Types & Which To Choose (2024)

With their adjustable thermostat controls and ventilation fan air technology, electric heaters ensure even heat distribution throughout the greenhouse. Plus, many electric heaters come with built-in safety features like overheat protection and automatic shut-off, providing peace of mind while keeping your plants at an optimal temperature.

Gas heaters (propane, natural gas)

A propane greenhouse heater is a popular choice for heating greenhouses. They provide reliable and efficient heat to keep plants warm in colder climates. With their fuel source easily accessible through a propane tank or a natural gas line, they offer convenience and ease of use more than a solar heating system.

Gas heaters are known for their heating capacity, making them suitable for large greenhouses that require ample warmth. Additionally, these heaters come with safety features like oxygen depletion sensors to ensure the well-being of both your plants and yourself.

Overall, a gas heater in an effective choice for maintaining the desired temperature range in your greenhouse without sacrificing energy efficiency or safety.

Infrared heaters

Infrared heaters provide an efficient and effective way to heat your greenhouse. An electric heater uses infrared radiation to directly warm objects and people in the room, rather than wasting energy heating the air.

This targeted heating method helps maintain a stable temperature within your greenhouse, keeping your plants warm and protected. Infrared heaters also tend to be more energy-efficient compared to other types of heaters, making them a cost-effective choice for greenhouse owners.

With their ability to evenly distribute heat and their convenient portability, infrared heaters are a reliable option for maintaining optimal growing conditions in your greenhouse.

Fan heaters

Fan heaters are a popular choice for greenhouse owners looking to provide efficient and reliable heating. These heaters use fan air technology to quickly distribute warm air throughout the space, ensuring that your plants stay warm even in cold climates.

With built-in thermostats and adjustable vents, fan heaters allow you to easily control the temperature and maintain an ideal growing environment for your plants. Additionally, fan heaters are energy-efficient and have safety features such as overheat protection, making them a practical option for any greenhouse.

How to Choose the Right Greenhouse Heater

To choose the right heater, consider the size and type of your greenhouse, determine your heating needs, look for energy-efficient options, and consider safety as a top priority.

Consider the size and type of your greenhouse

To choose the right greenhouse heater, it’s important to consider the size and type of your greenhouse. The size of your greenhouse will determine the heating capacity you need. Larger greenhouses may require more powerful heaters, while smaller ones can often be adequately heated with a smaller unit.

Additionally, different types of greenhouses may have varying insulation levels and ventilation systems, which can affect how well they retain heat. By considering these factors, you can ensure that you choose a heater that is suitable for your specific greenhouse needs.

Determine your heating needs

To choose the right greenhouse heater, you need to determine your specific heating needs. Consider the size and type of your greenhouse, as larger spaces may require more powerful heaters.

Think about the temperature range you want to maintain and whether you’ll be using supplemental heating or relying solely on a greenhouse heater. Take into account any existing insulation or thermal mass in your greenhouse that may affect heat retention.

By understanding your heating requirements, you can find a greenhouse heater that will effectively and efficiently keep your plants toasty throughout the colder months.

Look for energy-efficient options

When choosing greenhouse heaters – it is important to look for energy-efficient options. This will not only help you save on your energy bills but also reduce your carbon footprint.

Look for heaters that have an Energy Star label or high energy efficiency ratings. Consider heaters with programmable timers or thermostats that allow you to set specific temperature ranges and minimize unnecessary heating.

Investing in an energy-efficient greenhouse heater will ensure that your plants stay warm while being environmentally friendly.

Consider safety features

When choosing a greenhouse heater, it’s important to consider safety. Look for heaters that have overheat protection to prevent fire hazards and adjustable vents to maintain proper ventilation and make the best greenhouse ever.

Additionally, choose heaters with oxygen depletion sensors to ensure the air quality stays safe. Safety features are crucial for protecting both your plants and yourself while providing reliable heat in your greenhouse.

The Best Greenhouse Heaters on the Market

CategoryGreenhouse Heater Brand
Best Greenhouse HeaterBio Green Palma 2.0
Best Infrared HeaterDr. Heater
Best Propane HeaterMr Heater 540-Degree Heater
Best Heating MatsVIVOSUN Heat Mat
Honorable MentionsBuy Plus Heater Fan

Discover the top-performing electric, gas, and infrared heaters that will keep your greenhouse toasty and your plants thriving all year round.

See also  Greenhouse Millipede Prevention: Get Rid Of Them Naturally

Recommendation 1: Bio Green Palma 2.0 (Best Fan Heater)

greenhouse heaters

Where To Buy: Amazon

Key Features:
– 1500 W output that will rapidly warm your greenhouse and create the ideal conditions for your plants

– Includes a built in thermostat with an external oxygen depletion sensor cable to manage temperatures.

– Great price for a portable fan heater that serves its function perfectly.

– In my opinion – this is the best greenhouse heater on the market right now.

The Bio Green PAL 2.0/USDT Palma Heater is a versatile heating solution designed for optimal greenhouse conditions. With a powerful 5118 BTU/1500W output, it’s perfect for both grow tents and greenhouses up to 120 ft.², promoting plant thriving. This will even keep a large greenhouse toasty warm.

Featuring precise climate control, the heater comes with a digital summer/winter thermostat and UL-approved external sensor cable, ensuring a safe and controlled environment. Engineered in Germany for durability in humid conditions, it boasts a stainless steel housing and splash-proof elements, along with a fan only mode that you’ll love.

This cost-effective and energy-efficient heater is suitable for various spaces, including greenhouses, garages, and storerooms. The package includes the heater, thermostat, and user manuals for easy setup, backed by a 2-year warranty. Invest in the Bio Green PAL 2.0/USDT Palma Greenhouse Heater for reliable, efficient, and durable warmth to nurture your plants in any setting.

Here is a quick explainer video to give you more information:

Recommendation 2: Dr. Heater (Best Infrared Heater)

Where To Buy: Amazon

Key Features:
– 1500 W output that will rapidly warm your greenhouse and create the ideal conditions for your plants

– Includes a digital thermostat with an external sensor cable to manage temperatures.

– Great price for a portable fan heater that serves its function perfectly.

greenhouse heaters

The Dr. Heater DR218-1500W Greenhouse Infrared Heater is a powerful and efficient heating solution for maintaining an optimal climate in your greenhouse during winter. With a 1500W output, it’s designed to keep tender plants happy and thriving, covering an area of 150 sq. ft. Its IPX4 structure ensures protection against water splashing, and it’s both lightweight and portable for easy placement.

This heater utilizes fan-forced air technology for reliable and efficient heat distribution. With a permanently lubricated, totally enclosed, thermally protected motor, it offers long-lasting performance with minimal maintenance. The precision temperature sensor, built-in over-heat protection, and adjustable thermostat control allow you to create the perfect climate for your plants. This is perfect for small greenhouses.

Recommendation 3: Mr Heater 540-Degree Heater (Best Propane Heater)

greenhouse heaters

Where To Buy: Amazon

Key Features:
– 54-Degree propane heater that heats everything around it.

– Runs for about 10 hours on high with a 20 lb tank (running normal temperatures last a few weeks) while also saves energy.

– Adjustable temperature to get the perfect conditions in your greenhouse.

The Original 540-Degree 45,000 BTU Tank Top Radiant Propane Heaters is a versatile and portable heating solution for greenhouses. Mountable directly to a 20 lb propane tank, it offers easy portability. With a high-medium-low regulator, it provides adjustable heat settings from 30,000 to 45,000 BTUs. This means you can run it at a lower temperature, making it honestly one of the best propane heaters on the market.

The heater includes a tip-over safety shut-off switch, ensuring safety. On high, it offers an approximate 9.5-hour run time with a 20 lb tank. Suitable for 20-100 lb propane cylinders, this heater is an efficient choice for maintaining warmth in greenhouses, making it a smart investment for greenhouse owners looking for reliable and adjustable heating options.

Remember to keep it away from flammable objects because it could present a fire hazard, and make sure to keep the tank full because propane tanks frequently run out of gas.

Recommendation 4: VIVOSUN Heat Mat (Best Heat Mat)

Where To Buy: Amazon

Key Features:
– Creates stable heat that helps with rooting and see germination

– Waterproof material so it won’t short circuit if wet

– Thermometer with digital display so you can set the perfect temperature.

greenhouse heaters

The VIVOSUN 20″ x 20.75″ Seedling Heat Mat and Digital Thermostat Combo Set is a reliable and efficient solution for greenhouse enthusiasts. Maintaining temperatures ideal for seed germination and cutting propagation (68-86℉), this UL & MET-certified heating pad is made of durable PVC material. Its advanced far-infrared heating technology ensures stable and uniform heat distribution, promoting faster germination and growth without scorching roots. And it all functions with a handy remote control.

Built to last, this waterproof mat exceeds stringent MET standards and is easy to clean. It operates on only 40 Watts, providing cost savings on electricity. Equipped with a carrying bag, it’s portable and convenient for moving between locations. The combo set, when paired with the VIVOSUN thermostat, offers versatile applications for plant sprouting, indoor gardening, home brewing, and terrarium warming.

See also  Gazebo Greenhouse 101: Everything You Need To Know

The innovative heating design utilizes radiate far-infrared light waves, creating a soft and ample heat source that reaches up to 40 ℃ (104℉) in minutes. For optimal performance, it is recommended to use with the VIVOSUN thermostat controller and humidity dome. Invest in this combo set for precise temperature control and successful greenhouse propagation.

Recommendation 5: Buy Plus Heater Fan (Honorable Mention)

greenhouse heaters

Where To Buy: Amazon

Key Features:
– Overheating protection and rapid cooldown

– 3 Heat settings lets you choose a great environment in your greenhouse

– Very good with energy usage

The Electric Greenhouse Heater is a versatile and portable heating solution suitable for greenhouses. Utilizing innovative PTC technology, it ensures safe operation by generating heat only as needed, preventing overheating. With a long cord and compact design, it’s ideal for use in large greenhouses, garages, offices, and workplaces.

The heater offers three heat settings (fan only, low, and high heat), providing quick warmth and comfort. It’s energy-efficient, saving on heating costs, and includes protection from overheating. With fast heating capabilities, adjustable thermostat, and a focus on safety, this heater is an excellent choice to adequately heat your greenhouse.

No matter how much heat you need, this is a good bet for your greenhouse.

Tips for Using Greenhouse Heaters

Properly place your greenhouse heaters to ensure even heat distribution throughout the space. Regularly clean and maintain your heaters to optimize their performance. Monitor temperature and humidity levels to create the ideal environment for your plants.

Proper placement for even heat distribution

Place your greenhouse heater strategically to ensure even heat distribution. Position the heater in a central location, allowing the warm air to circulate throughout the space effectively.

Avoid placing it too close to plants or walls, as this can create hotspots and uneven heating. Additionally, consider using fans or ventilation systems to help distribute the warm air evenly across the entire greenhouse.

By properly placing your greenhouse heater, you’ll provide consistent warmth for your plants and protect them from cold temperatures.

Regular maintenance and cleaning

Regular maintenance and cleaning are essential for keeping your greenhouse heater in optimal condition. This ensures that it functions efficiently and provides reliable heat for your plants.

To maintain your heater, regularly check for any dust or debris that may have accumulated on the unit or heating elements. Clean these areas using a soft cloth or brush to prevent them from affecting the performance of the heater.

Additionally, inspect and replace any damaged or worn-out parts as needed to ensure safety and prolong the lifespan of your greenhouse heater.

Monitoring temperature and humidity levels

To ensure optimal conditions for your plants, it is crucial to monitor the temperature and humidity levels inside your greenhouse. By regularly checking these factors, you can make adjustments as needed to create a suitable environment for your plants to thrive.

Use a digital thermometer and hygrometer to accurately measure the temperature and humidity levels. Keep in mind that different plants have varying preferences, so it’s important to find the right balance for your specific plant species.

This will help prevent issues like overheating or excessive moisture that could harm your plants’ health.


In conclusion, choosing the right greenhouse heater is essential for efficient plant protection. Whether you opt for an electric, gas, or infrared heater, consider factors such as size, heating needs, energy efficiency, and safety features.

With the best greenhouse heaters on the market and proper usage tips in mind, you can ensure your plants stay warm and thriving even in frosty weather.

Greenhouse Heaters FAQs

What types of greenhouse heaters are best for plants?

There’s a variety to consider like electric greenhouse heaters, propane greenhouse heaters, paraffin heaters, and even solar heating systems!

How do I regulate the temperature in my greenhouse?

Most modern heaters come with built-in thermostats and digital displays allowing you to keep an ideal greenhouse temperature with ease.

Can a solar panel kit be used to heat up the greenhouses?

Yes! A good solar system can provide heat and power your small greenhouses efficiently while being energy efficient.

Are there any downsides using propane or paraffin heaters?

While propane and paraffin heaters work great in lower temperatures, they can release air pollutants which might not be ideal for small spaces without appropriate ventilation.

My heater takes up too much floor space; what should I do?

Consider portable heaters with designs that promote vortex air circulation; these often help prevent hot air pockets efficiently but taking minimal floor space.

What measures are essential for controlling heat loss in a Greenhouse?

Sealing any potential air leaks is crucial as they increase the heat loss value in your electrical system significantly raising fire risk if not checked regularly.

Avatar photo

Jason Watson

My initial goal was to protect my loved ones from harmful pesticides & help them enjoy nature more. Now, I want to tell as many people as I can about what I've learned... I hope that I can inspire you to help cool our planet with your own little slice of paradise 🌱. Let's do this together!

More to Explore