4.5m x 3m Walk-In Polytunnel Greenhouse with Galvanised Steel Frame - White
A spacious 13.5m² growing environment with a reinforced galvanised steel frame designed to withstand UK weather and extend the gardening season.
- Rust-resistant galvanised steel frame for longevity
- UV-resistant PE cover protects plants and prevents material degradation
- Reinforced with 4 extra slant rods for improved structural integrity
- Extended 15cm cover edges for secure ground anchoring
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 vegetable patches
- Growing tropical plants in the UK climate
- Gardeners wanting to start seeds early in spring
- Allotment use where a permanent glass structure is not feasible
This 4.5m x 3m walk-in polytunnel provides a spacious and protected environment for growing fruit, vegetables, and plants throughout the year. The heavy-duty design helps extend the growing season by shielding crops from wind, light rain, and pests while maintaining the humidity levels required for healthy growth.
- Galvanised Steel Frame: The rust-resistant frame includes four extra slant supporting rods and a bottom frame designed to be secured into the ground for increased stability.
- UV-Resistant PE Cover: The fully closed waterproof cover allows sunlight to reach your plants while protecting them from UV damage and maintaining internal heat.
- Ventilation and Access: Features six mesh windows to encourage air circulation and a large zippered roll-up door for easy entry with tools or trays.
- Secure Ground Fixing: Includes four wind ropes and ground stakes, plus a 15cm extended cover edge that can be buried in the soil to prevent lifting and water accumulation.
Built for gardeners who require a reliable and sizeable growing space, this tunnel shelter offers over 13 square metres of floor area. The internal height of 2.05 metres allows most adults to walk inside comfortably, making it easier to tend to tall plants or move equipment without restriction. The mesh windows not only provide essential airflow during warmer months but also serve as observation points to monitor plant progress without disrupting the internal climate.
Assembly is supported by a reinforced structure, where the bottom frame is intended to be nailed into the ground. By burying the 15cm extended edges of the white PE cover, you create a tighter seal that improves wind resistance and helps prevent rainwater from pooling at the base. This setup is particularly effective for starting seeds early in the spring or protecting delicate tropical species during cooler periods.
| Assembled Length | 445cm |
| Assembled Width | 300cm |
| Assembled Height | 205cm |
| Assembled Weight | 17.5kg |
| Material | Galvanised Steel, PE |
| Colour | White |
| Door Type | Zippered Roll-up |
| Number of Windows | 6 Mesh Windows |
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.
