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    Halls Magnum Green 8x12 Greenhouse

    • 8ft 5" (2570mm) Wide Aluminium Greenhouse.
    • 6mm Twin Wall Polycarbonate Glazing.
    • Green Aluminium Frame.
    • Box Section Ridge Bar.
    • Cast Iron Joints on Ridge and Eaves.
    • Double Sliding Doors with Lock.
    • 4x Opening Roof Vents.
    • 10 Year Warranty (Frame and Base).
    • HALLS ACCESSORIES - ADD BELOW.

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    The 8ft 5" wide Halls Magnum 8x12 with double doors is a great greenhouse for the keen gardener or allotment keeper with room for a larger greenhouse.

    The Halls Magnum 8ft x 12ft Greenhouse will give you more than enough growing space to bring on seedlings as well as grow salad, herbs and vegetables all year round. The great thing about an 8ft wide greenhouse is the working space inside that means a couple of you can be toiling away potting up or plants without bumping into each other. The extra width also gives you more planting options such as using large raised beds or tubs for vine plants.

    The Magnum is strengthened at the eaves and ridge by using cast iron joints as well as the actual ridge bar itself being constructed from thick box section. These strengthening features will keep the greenhouse rigid and square in strong winds.

    Halls 6mm Twin Wall Polycarbonate is the ultimate glazing choice for safety. This is especially important in educational and public environments where children may be present and insurance may dictate that glass is not used. 6mm polycarbonate glazing gives the magnum the very best insulation and heat retention properties and is the glazing of choice in Europe above glass.

    • 8ft 5" (2570mm) Wide Aluminium Greenhouse.
    • 6mm Twin Wall Polycarbonate Glazing.
    • Green Aluminium Frame.
    • Box Section Ridge Bar.
    • Cast Iron Joints on Ridge and Eaves.
    • Double Sliding Doors with Lock.
    • 4x Opening Roof Vents.
    • 10 Year Warranty (Frame and Base).
    • HALLS ACCESSORIES - ADD BELOW.
    Greenhouse Size Diagram

    Greenhouse Dimensions

    A: Greenhouse width

    2570mm (8′ 5″)

    B: Greenhouse depth

    3840mm (12′ 7″)

    C: Ridge height

    2580mm (8′ 5″)

    D: Eaves height

    1480mm (4′ 10″)

    E & F: Door Size

    1200mm (3′ 11″) x 1820mm (5′ 11″) (aperture)

    Minimum Base Size

    2570mm (8′ 5″) x 3840mm (12′ 7″)

    How to Prepare the Ground for a Greenhouse Base

    How to Prepare the Ground for a Greenhouse Base

    A solid base is the backbone of any greenhouse. You might think skipping this step saves time, but trust me—I've seen plenty of greenhouses fail because of poor foundations. A dodgy base causes more headaches than you'd believe.

    What happens with a bad base? Glass cracks. Doors jam. The structure twists. Water pools where it shouldn't. And fixing these problems costs way more than doing it right first time.

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    Best Position for a Greenhouse UK

    Best Position for a Greenhouse UK

    Placing your greenhouse in the right spot makes all the difference between thriving plants and disappointing results. As a greenhouse specialist who's spent 15 years helping UK gardeners optimise their growing spaces, I've seen first-hand how position affects everything from temperature regulation to plant health.

    Let me share what actually works in our unique British climate. The greenhouse position might seem like a minor detail, but it's one of those things that can make or break your growing success. I made this mistake myself when I first started - my poorly positioned greenhouse meant I was fighting an uphill battle with inadequate light and temperature fluctuations.

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