3 Best Outsunny Greenhouses Under $200, Compared

Quick picks

The best fit for you

• You need a large footprint for manual ventilation control Outsunny 12x7x7 Walk-in Tunnel Greenhouse The 12-foot length and 85.2-inch height provide ample space for manual climate adjustments.
• You want durable UV protection in a small space Outsunny 6x6 Polycarbonate Walk-in Greenhouse Polycarbonate panels offer superior longevity and UV protection compared to standard plastic covers.
• You require maximum floor space for large crops Outsunny 20x10x7 Walk-in Tunnel Greenhouse The 20-foot length delivers the largest growing area among the options listed here.

Our 3 picks

1 Best overall

Outsunny 12x7x7 Walk-in Tunnel Greenhouse

Best for: Gardeners needing large manual ventilation control

Frame Material

powder-coated steel

Panel Material

140 GSM PE

Size

12' x 7' x 7'

Height

7.1' H

Door Type

roll-up zipper doors

Windows

4

View on Amazon: Outsunny 12x7x7 Walk-in Tunnel Greenhouse Affiliate link

This Outsunny walk-in tunnel greenhouse measures 12 feet long by 7 feet wide with a 7.1-foot height. It uses a 140 GSM PE cover that blocks UV rays while letting in 85% of sunlight. The steel frame is powder-coated for durability. You get roll-up windows with screens for ventilation and zippered doors for access. This kit includes 12 ground stakes to secure the structure against wind and rain.

Pros

• 12' x 7' x 7' footprint offers ample growing space
• 140 GSM PE cover blocks UV while transmitting 85% sunlight
• Roll-up windows include screens for controlled ventilation
• Powder-coated steel frame resists chipping and peeling

Cons

• Requires manual adjustment of roll-up windows and zippered doors
• PE cover material is less durable than polycarbonate panels
• Must be taken down before strong winds or storms

Good fit if

• You need a large 12-foot footprint for extensive planting
• You prefer manual ventilation control via roll-up windows
• You want a structure that blocks harmful UV rays

Skip if

• You require automatic ventilation systems
• You need a polycarbonate panel structure
• You live in an area with frequent severe storms

Verdict: Outsunny 12x7 Tunnel Greenhouse provides a spacious 12-foot footprint for gardeners who need manual control over ventilation and light exposure. It suits those who prioritize a large growing area and UV protection over automated features or permanent panel durability.

2 Best premium

Outsunny 6x6 Polycarbonate Walk-in Greenhouse

Best for: small spaces needing durable UV protection

Frame Material

aluminum

Panel Material

polycarbonate

Size

6' x 6'

Height

6.4' H

Door Type

lockable door

Ventilation

adjustable roof vent

View on Amazon: Outsunny 6x6 Polycarbonate Walk-in Greenhouse Affiliate link

This 6-foot by 6-foot walk-in greenhouse uses polycarbonate panels to protect plants from wind, rain, and UV damage. It lets in 90% of light while maintaining a controlled environment. The aluminum frame resists corrosion, and the adjustable roof vent helps manage humidity. You get a dedicated space for seedlings and tools. It suits gardeners who need a compact, durable structure for year-round growing without requiring a large footprint.

Pros

• Polycarbonate panels block UV damage while allowing 90% light transmission
• Adjustable roof vent controls humidity and heat
• Aluminum frame resists corrosion for long-term durability
• Includes rain gutters for water collection

Cons

• 6-foot width is smaller than the 12-foot and 20-foot options on this list
• Polycarbonate panels are heavier and less transparent than PE plastic alternatives
• No automatic climate control or remote monitoring features listed

Good fit if

• You have limited garden space but need a walk-in structure
• You want to collect rainwater for your plants
• You prefer durable polycarbonate over plastic covers

Skip if

• You need a large footprint for commercial growing
• You prefer lightweight plastic covers for easy storage
• You want automated ventilation systems

Verdict: Outsunny 6x6 Polycarbonate Greenhouse fits small-space gardeners who want durable, UV-protected growing space with manual climate control. It is ideal for those prioritizing material longevity over maximum square footage.

3 Best budget

Outsunny 20x10x7 Walk-in Tunnel Greenhouse

Best for: large footprint gardeners needing walk-in access

Frame Material

galvanized steel

Panel Material

PE plastic

Size

20' x 10' x 7'

Height

7'

Door Type

zipped rollup door

Windows

8

View on Amazon: Outsunny 20x10x7 Walk-in Tunnel Greenhouse Affiliate link

This Outsunny greenhouse offers a 20 by 10 by 7 foot footprint for serious growing. It features a galvanized steel frame with reinforced bracing for stability. The PE plastic cover allows sunlight through while protecting plants. You get eight roll-up side windows with netting for ventilation. A large zippered door provides easy access. This setup suits those needing a large, walk-in space for extended seasons.

Pros

• 20' x 10' x 7' walk-in footprint
• Galvanized steel frame with rust resistance
• 8 roll-up windows with netting for ventilation
• Zippered roll-up front door for access

Cons

• PE plastic cover requires removal in heavy snow
• No polycarbonate panels for superior insulation
• Assembly relies on tether balls and tape

Good fit if

• You need a large 200 square foot growing area
• You want a walk-in structure for easy management
• You prefer natural ventilation via roll-up windows

Skip if

• You require polycarbonate panels for better heat retention
• You cannot remove the cover during heavy snow
• You need a smaller 6' x 6' footprint

Verdict: Outsunny 20x10x7 Walk-in Greenhouse fits buyers who prioritize maximum floor space and ventilation over premium panel materials. It is a practical solution for gardeners needing a large, accessible tunnel for their crops.

Specifications side by side

How to Choose the Right Greenhouse

1. Check the footprint size

   Measure your available garden space before buying. The 12x7x7 tunnel offers a 144-inch length, which is ideal for gardeners who need a large manual ventilation area. If your space is tighter, the 6x6 polycarbonate model provides a 72-inch length that fits smaller yards. The 20x10x7 tunnel has a 64-inch length but a wider 13-inch width, which may not suit all layouts. Ensure the dimensions match your actual ground area to avoid fit issues during setup.

2. Select the right material

   Your climate dictates the best cover material. The 6x6 polycarbonate greenhouse uses durable panels that offer superior UV protection and longevity compared to standard plastic. This model is best for small spaces where you prioritize material durability over maximum square footage. The 12x7x7 tunnel uses a PE cover, which is lighter and suitable for those who prioritize a large growing area and UV protection over permanent panel durability. Choose polycarbonate for long-term resilience in harsh weather.

3. Verify the frame strength

   The frame determines how well the structure withstands wind and snow. The 12x7x7 tunnel features a steel frame, providing sturdy support for its large 12-foot footprint. This steel construction helps maintain shape during manual ventilation adjustments. The other models do not specify frame materials in the provided data, so you must check their listings for structural details. A steel frame is generally preferred for larger structures to ensure stability and safety for your plants throughout the growing season.

4. Consider walk-in access

   Ease of access affects your daily gardening routine. All three listed models are walk-in styles, allowing you to enter the structure easily. The 12x7x7 tunnel has an 85.2-inch height, offering ample room to stand comfortably. The 6x6 polycarbonate model has a 76.8-inch height, which may require slight bending for taller users. The 20x10x7 tunnel has a 5.99-inch height, which seems unusually low and may restrict movement. Verify the height specs to ensure you can move freely inside the greenhouse.

5. Evaluate weight and portability

   Heavier structures are more stable but harder to move. The 12x7x7 tunnel weighs 55 pounds, making it manageable for two people to assemble. The 6x6 polycarbonate model is slightly heavier at 58 pounds, while the 20x10x7 tunnel weighs 67 pounds. Consider how often you might need to relocate the greenhouse. A lighter PE cover structure is easier to adjust, whereas heavier polycarbonate models offer better durability but require more effort to set up or move if needed.

Frequently asked questions

See also

• outsunny vs garvee greenhouse
• outsunny vs backyard discovery greenhouse
• best outsunny gazebos under 200
• best climbers under 200