Halls Forest Green Magnum 12ft x 8ft Greenhouse (Green Frame)

Mode Magnum 128 Green Frame

Strong Aluminium frame, using cast iron joints ensuring this spacious and stylish structure is completely safe. Its double doors provide you with a helpful addition, allowing clear access for wheelchairs, plenty of room for your wheelbarrow and the option of extra ventilation if required. Extra ridge height adds in added dimension providing you with greater headroom for the development of your taller plants.

Growing area

9.9 square metres

Door opening width

1200 mm

No. of vents


Internal height to ridge

2.390 metres

Internal height to eaves

1.360 metres

External width

2.570 metres

External length

3.84 metres

Addition of base to height

128 mm

DOUBLE DOORS are standard on this model. All toughened glass models in this range utilise SINGLE SHEET GLASS in the roof and side walls.

Would you like a Halls base for your greenhouse?
A Halls Steel Base can only be ordered at the same time as a greenhouse. This will make your life a whole lot easier compared to the alternative of building your own brick surround base Note: we only supply GENUINE Halls Bases - some don't.


Select frame colour and glazing options from the list on the right.


Select an optional base for your greenhouse.


Select your shipping option. UK Mainland & N. Ireland or Scottish Highlands. For other areas or overseas deliveries please contact us for a quote 


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Each Halls Magnum model comes in a choice of glazing options to suit your tastes

Traditionally horticultural glass has been used. Sunlight is allowed to stream into the greenhouse for maximum light and warmth.

By choosing small pane toughened glass, you can be sure of added safety, whilst allowing
sunlight to penetrate the glass just as horticultural glass does.

You can also choose large pane toughened glass which comes in single sheets.
It's always best to check with your local supplier to ensure that the model you select is available in a particular type and size of glass.