10 Best Portable Greenhouse Heaters 2025 in the United States

The Dr Infrared Heater DR-268 is a solid choice for those seeking a portable greenhouse heater. With its heating capacity of up to 1500W, it effectively warms areas of 150-200 square feet, making it suitable for greenhouses, garages, and sheds. One of its standout features is the built-in digital thermostat, which allows for precise temperature control, ensuring that your plants stay at the right temperature without wasting energy. User-friendly features like the digital display and selectable Auto or Manual modes also make operation straightforward, even for those who aren't tech-savvy.

Safety is a priority with this heater, as it includes features like overheat protection and is designed to be water-resistant (rated IPX5), allowing it to be used both indoors and outdoors without worrying about damage from moisture. Its construction from dual layers of aluminum helps retain heat effectively, making it especially useful in colder environments.

There are some considerations to keep in mind. The heater requires assembly and, while it has multiple mounting options, it may not be as easy to reposition once installed. Additionally, while it’s energy efficient, being electric means it will add to your electricity bill, especially with continuous use. Lastly, with a one-year limited warranty and USA-based customer support, users can feel secure about their purchase. This heater is particularly suited for gardeners and growers looking for a reliable, versatile heating solution that can easily adapt to different spaces and conditions.

The Buyplus Greenhouse Heater is a practical choice if you need to keep a small to medium greenhouse warm, covering about 215 square feet with its 1500W power. It heats up quickly—in just a few seconds—so your plants get warmth almost immediately. The built-in digital thermostat lets you set and maintain temperatures between 40℉ and 108℉, which helps create a stable environment for plants. Safety is well handled with an overheat protection feature that automatically shuts off the heater if it gets too hot, giving peace of mind during use.

Portability is a strong point here: it’s lightweight (around 9 pounds), has a handle for easy moving, and a long 7.5-foot power cord, so you can place it where it’s most needed. The heater also offers two modes—full heating or just a fan—for year-round use, which adds versatility beyond just keeping plants warm. Being electric, it’s easy to power up indoors or outdoors, but keep in mind it needs an outlet.

On the downside, while 1500W is sufficient for smaller spaces, it may struggle in larger greenhouses or extremely cold environments. The energy efficiency isn’t specifically highlighted, so it might use a fair amount of electricity when running at full power. Also, the size and dish shape mean it’s best placed on the floor or a stable surface, not mounted. If you need a straightforward, portable heater with reliable temperature control and safety for protecting plants in a small greenhouse or similar spaces like patios or garages, this Buyplus model is a solid option to consider.

This 1500W greenhouse heater is designed to keep small to medium growing spaces, up to about 150 square feet, warm and safe during colder months. It offers a good heating capacity for typical home greenhouses or grow tents. The smart thermostat control is a standout feature, allowing you to monitor and adjust the temperature remotely via an app on your phone. This adds convenience and helps maintain optimal conditions for your plants without needing to be physically present. You can also set temperature alerts so you’ll be notified if it gets too hot or too cold, which adds peace of mind.

Safety is well-covered with automatic shutoffs if the heater overheats or tips over, making it safer around precious plants and in busy spaces like garages or sunrooms. The heater also includes a fan mode that helps circulate air in warmer seasons without drying out your plants, adding versatility beyond just heating. On energy efficiency, while 1500 watts is a common power rating for portable heaters, the product claims to help save energy with precise temperature control, but running it continuously could still impact your electric bill depending on usage length and local rates. Its electric power source means no fuel storage or fumes, which is suitable for indoor and outdoor use.

Portability is decent; the heater is relatively compact and lightweight, making it easy to move between locations as needed. The cabinet-style form factor lets it stand securely on the floor. This heater is well suited for gardeners wanting smart, reliable temperature control in small to mid-sized greenhouses or grow tents. Its smart features and safety protections are definite advantages, though users should consider typical electric heater power consumption. It may be less ideal for very large greenhouses or those seeking ultra energy-efficient solutions.