Halls Magnum 8ft x 12ft Green Greenhouse

A forest green-framed Halls magnum 8ft x 12ft greenhouse is the perfect size for many gardens, not too large but with a copious amount of room to create a very productive growing environment.

  • 8ft Wide by 12ft Deep Greenhouse from the Halls Magnum Range
  • Bigger, Stronger & Increased Internal Growing Space
  • Crafted from Virtually Maintenance-Free Aluminium
  • Powder Coated Frame in a Natural Green Colour Finish
  • Wide Access with Double Easy-Open Sliding Doors
  • 60cm Taller External Ridge Height Compared to the Halls Popular Range
  • Integrated Side Roof Gutters For Rainwater Collection
  • Integrated Cast Iron Joints for Added Frame Strength
  • Official Halls Branded Frame, Glazing & Accessories
  • Included As Standard: Four Opening Roof Vents
  • Included As Standard: 12-Year Manufacturer's Frame Guarantee
  • Choose From Horticultural, Toughened, or Polycarbonate Glazing

£1,349.00 inc. VAT

Buy now, pay later with PayPal Credit

Delivery Normally Within 10 - 20 Working Days.

Configure Your Greenhouse

1 Glazing Customisation

with Horticultural Glass

with Horticultural Glass (70892)

Provided with standard 3mm-thick horticultural clear glass, consisting of mainly 2ft square panes that overlap onto the frame and are held in place with glazing clips.

with Toughened Glass

with Toughened Glass (70893)

Provided with 3mm-thick clear toughened glass that is a lot stronger than standard horticultural glass. Supplied in mostly full-length panes.

with Polycarbonate Glazing

with Polycarbonate Glazing (70903)

Super durable 4mm-thick plastic glazing, twin-walled and opaque (semi-transparent). The safest option that's great at insulating. Supplied in mostly full-length panes.

2 Accessories: Base Plinth

with Base Plinth

with Base Plinth (SO8319)

A metal base plinth that is designed to add additional height to your greenhouse and provide a sturdy base frame for the greenhouse to be installed on top of. Highly recommended for when the greenhouse will be sited on grass, gravel, and compacted soil.

3 Accessories: Ventilation

with Auto Roof Vent Opener

with Auto Roof Vent Opener (70182)

A solar-powered auto opener for a roof vent. Automatically opens and closes a roof vent as the outside temperature changes.

  • 17% Off
  • Save £10.00
with Extra Green Roof Vent

with Extra Green Roof Vent

An additional roof vent, replacing a standard roof pane, allowing additional air flow throughout your greenhouse.

with Green Louvre Window

with Green Louvre Window

A louvre window to add extra ventilation within the greenhouse. Usually installed in the lower section of a side wall.

with Auto Louvre Opener

with Auto Louvre Opener (70959)

A solar-powered auto opener for a louvre window. Automatically opens and closes a louvre window as the temperature changes.

4 Delivery Services

with Delivery to Mainland England, Wales & Scotland

with Delivery to Mainland England, Wales & Scotland

Standard, inclusive delivery for a greenhouse being delivered within Mainland England, Wales, and Scotland.

with Bespoke Delivery to Isle of Wight/Man and Scottish Islands

with Bespoke Delivery to Isle of Wight/Man and Scottish Islands

Our extended, bespoke delivery service for a greenhouse being delivered to the Isle of Wight, Isle of Man and Scottish Islands.

with Bespoke Delivery to Jersey or Guernsey

with Bespoke Delivery to Jersey or Guernsey

Our extended, bespoke delivery service for a greenhouse being delivered to Jersey or Guernsey.

with Bespoke Delivery to Northern Ireland

with Bespoke Delivery to Northern Ireland

Our extended, bespoke delivery service for a greenhouse being delivered to Northern Ireland.

5 Installation Services

Please Quote Me For Installation of My Greenhouse

Please Quote Me For Installation of My Greenhouse

If you require or are thinking of purchasing an installation service along with greenhouse order, tick this box and we'll get back to you with a no-obligation quotation for installation services. We'll contact our recommended installers and email you with an installation price quotation for your consideration, catered to your chosen greenhouse and location.
Note: A base plinth MUST be purchased above for installation services to be valid. The installers will not complete the installation without the matching base plinth accessory. The area must be prepared, flat, level, and solid prior to installation, such as concrete or slabbed base area.

6 Additional Accessories

with 3ft 1-Tier Silver Staging

with 3ft 1-Tier Silver Staging (SO1708)

with 3ft 2-Tier Silver Staging

with 3ft 2-Tier Silver Staging (SO1709)

with 3ft Silver Top Staging Extension

with 3ft Silver Top Staging Extension (70137)

with 2ft 10ins Silver Shelf Set (Pair)

with 2ft 10ins Silver Shelf Set (Pair) (R04101)

with 3ft 1-Tier Green Staging

with 3ft 1-Tier Green Staging (70134)

with 3ft 2-Tier Green Staging

with 3ft 2-Tier Green Staging (70128)

with 3ft Green Top Staging Extension

with 3ft Green Top Staging Extension (70131)

with 4ft 10ins Silver Shelf Set (Pair)

with 4ft 10ins Silver Shelf Set (Pair) (R04104)

with 2-Tier Potting Bench

with 2-Tier Potting Bench (70684)

with 3-Tier Seed Tray Unit

with 3-Tier Seed Tray Unit (70686)

with 100L Water Butt & Stand

with 100L Water Butt & Stand

with Rainwater Downpipe Kit

with Rainwater Downpipe Kit

  • 26% Off
  • Save £10.00
with Roller Blinds (Pair)

with Roller Blinds (Pair) (E05119)

with 8ft Shading Screen

with 8ft Shading Screen (70963)

with Paraffin Heater

with Paraffin Heater (F04453)

with Plastic Plant Rings (20 Pack)

with Plastic Plant Rings (20 Pack) (F04711)

with Plants Spirals (3 Pack)

with Plants Spirals (3 Pack) (F04905)

with Solar LED Lamp

with Solar LED Lamp (F04841)

with Thermometer

with Thermometer (F04353)

with Pot Holder

with Pot Holder (F04842)

Product Description

Its aluminium frame benefits from a powder coating that increases durability and cast iron joints provide additional strength to what is already a robust structure.

Be ready to choose from lots of options to complete your greenhouse which has double sliding doors to enable easy entry whatever you are carrying or pushing. 

To start with there are three glazing alternatives, then you have to decide whether to opt for another roof vent, adding to the four that are fitted as standard regulating humidity and temperature.  

A louvre might also be considered, together with automatic openers that ensure the conditions inside the greenhouse are always ideal even when you are on holiday.

Always popular are shelving and staging used for storage and many different tasks such as sowing seed and potting plants. Many people like to recycle rainwater for their plants, this is easy if you fit a collection kit used in conjunction with an automatic irrigation unit.

PDF Downloads

Halls Greenhouses 8x12 Magnum Instruction Manual

Halls Greenhouse Warranty Terms

Product Specification

Door Opening Height:
182cm (6ft)
Door Opening Width:
120cm (3ft 11in)
External Depth:
384cm (12ft 7in)
External Height To Eaves:
151cm (5ft)
External Height To Ridge:
258cm (8ft 6in)
External Width:
257cm (8ft 5in)
Growing Area:
9.9sqm
Optional Base Plinth Height:
12cm ( 4.7in)

Delivery Information

Halls Greenhouse Delivery

For the majority of our greenhouses, we offer inclusive delivery within mainland England, Wales, and Scotland.

The delivery timeframe may vary for each greenhouses range and so live delivery timeframes can be found on each product page, giving you the most up-to-date and realistic delivery information.

Inclusive Delivery Areas

Our standard, inclusive delivery covers the majority of England, Wales, and Scotland.

Non-Inclusive Delivery Areas

Our non-inclusive delivery areas which will incur an additional delivery charge include;

  • Scottish Islands
  • Isle of Man / Wight
  • Jersey or Guernsey
  • Northern Ireland

The additional delivery charge to these areas can be found and selceted on the delivery option on each greenhouses' product page.

Unfortunately, due to the large nature of the greenhouses, we can't deliver to the Republic of Ireland or to any other countries outside of UK.

See our Delivery Information guide for full details, how greenhouse deliveries are made and what to expect during delivery. 

Installation Services
Installation services are available on our greenhouse products, excluding lean-to models, within mainland England and Wales, but excludes Scotland, Scottish Highlands, Northern Ireland, and Offshore Islands.
Installation is limited to home addresses only - we are unable to install on allotments (although we can deliver to them if they have a postcode).

See our Installation Information guide for full details, how to prepare a base area ready for your greenhouse installation, installation terms, and what to expect during installation.

Halls Magnum 8ft x 12ft Green Greenhouse

£1,349.00 inc. VAT