4m x 3m Walk-In Polytunnel Greenhouse with 3 Doors - Green
A high-capacity walk-in growing space featuring a three-door design for superior accessibility and ventilation compared to standard models.
- Galvanised steel frame for improved rust resistance and structural longevity
- 140gsm reinforced PE cover designed to withstand UV exposure
- Complete anchoring kit included with stakes and guy ropes for added 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
- Allotment gardening
- Growing vegetables and fruit
- Extending the growing season
- Gardeners needing frequent access to multiple areas of the tunnel
This spacious 4m x 3m walk-in polytunnel is designed to provide a controlled environment for growing a wide variety of plants, flowers, and vegetables. Its large footprint offers ample room for flexible internal layouts, making it suitable for both hobbyists and more experienced gardeners.
- Three Roll-Up Doors: Features three large zip-up doors that provide easy access to different sections of the tunnel and allow for high levels of cross-ventilation.
- Six Mesh Windows: Equipped with six mesh-lined windows to regulate temperature and humidity while preventing larger pests from entering.
- 140gsm Reinforced Cover: The durable PE cover includes a middle reinforcement grid for added strength and is UV-resistant to protect plants from harsh sunlight.
- Galvanised Steel Frame: Built with a sturdy, rust-resistant galvanised steel core and slanted bracing tubes for improved structural integrity.
- Stability Kit: Includes four ground stakes and four guy ropes to help secure the structure firmly to the ground.
The walk-in design of this garden polytunnel ensures you have plenty of vertical clearance and floor space to organise your growing area exactly how you need it. Whether you are overwintering delicate plants or starting seedlings early in the season, the 140gsm cover provides a protective shell against light weather and UV rays.
Construction is focused on durability, using a galvanised steel frame that resists the elements better than standard steel. The inclusion of slanted bracing tubes and a full anchoring kit provides the necessary stability for outdoor use in gardens or on allotments. With its three-door configuration, managing airflow and accessibility is significantly easier than with traditional single-door models.
| Height | 200 cm |
| Length | 397 cm |
| Width | 300 cm |
| Frame Material | Galvanised Steel |
| Cover Material | 140gsm Reinforced PE |
| Front Door Dimensions | 180H x 160W cm |
| Side Door Dimensions | 150H x 133W cm |
| Window Dimensions | 40H x 47W cm |
| Assembled Weight | 21 kg |
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.
