Outsunny 4 x 3m Walk-In Polytunnel Greenhouse with 6 Windows
A large-scale, walk-in growing solution that offers 12 square metres of weather-protected space for professional-style gardening at home.
- Strong steel framework provides dependable structural integrity in typical garden conditions.
- Reinforced PE cover helps maintain a consistent microclimate for improved plant growth.
- Included ground stakes and ropes offer essential anchoring for increased stability.
Ends Friday 31st July
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Delivery by 14th Jul 2026
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FREE UK mainland delivery
From our curation team
Why we recommend this
Often a strong fit for
- Large allotments
- Growing tall crops like tomatoes and cucumbers
- Gardeners requiring wheelbarrow access into their greenhouse
This spacious walk-in polytunnel provides a protected environment for growing a wide variety of vegetables, fruits, and flowers throughout the seasons. The large internal area allows for easy movement while tending to your plants, making it a practical choice for keen gardeners and allotment holders.
- Generous Growing Space: The 4 x 3m footprint offers ample room for multiple plant rows, seed trays, and larger pots, providing a total of nearly 12 square metres of covered space.
- Temperature and Airflow Control: Six mesh windows allow for consistent ventilation to prevent overheating, while the thick PE cover helps retain heat during cooler spells.
- Large Zipped Access: A wide, roll-up zipped door ensures easy entry for gardeners and equipment, providing a clear 170cm wide opening.
- Stable Steel Construction: The metal frame provides a sturdy structure, supported by four included guy ropes and ground stakes to help keep the tunnel secure in standard conditions.
Constructed with a steel frame and a thick PE cover, this greenhouse is designed to shield your crops from light rain, wind, and bird damage. The green mesh-reinforced cover creates a diffused light environment that helps prevent scorching while maintaining the humidity levels necessary for healthy growth. Its walk-in height of 2 metres makes it comfortable to use without the need for constant bending.
Please note that this structure is designed for seasonal plant protection and should not be left up during periods of heavy snow, high winds, or extreme weather conditions to prevent damage to the frame and cover.
| Assembled Height | 200cm |
| Assembled Length | 397cm |
| Assembled Width | 300cm |
| Assembled Weight | 17.5kg |
| Door Dimensions | 170H x 170Wcm |
| Window Dimensions | 45L x 37Wcm |
| Frame Material | Steel |
| Cover Material | PE Plastic |
This product is dispatched and delivered by our approved partner, Giga from their UK warehouse.
- Cost: Delivery is FREE for all orders within mainland UK.
- Delivery Method: Please be aware that larger items are delivered kerbside (the street or pavement outside your property).
Easy Returns
Not the perfect fit? No problem. Our returns process is straightforward and completely free.
- 21 Day Guarantee: You can return your item up to 21 days after delivery.
- Online Portal: To start a return, simply visit our online portal and follow the prompts to generate your labels or schedule a collection.
For more information, please see our returns policy.
