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Ridge ventilation

Air circulation starts low down in our greenhouse but hot exhausted air can escape through the handsome full length ridge vents, located on both sides of the greenhouse for optimum air flow. Plants love air movement, you will be rewarded if you offer plenty of fresh air. To this end our vents are automated with heat sensitive cylinders and strong spring mechanisms. 6mm toughened clear glass panels allow maximum light and the openers allow maximum ventilation.

Find out more Configure now

Accoya Framework

We are proud to manufacture with Accoya. It is an acetylated wood that has been thoroughly tested for dimensional stability and durability, guaranteed for 50 years untreated and even given a 70 year service life by TRADA. Accoya is so strong that it is used in the construction of bridges and even to line canals. Accoya is produced from fast growing, renewable, well-managed sources and as such has a low, even negative carbon footprint. Organically treated Accoya carries a prized FSC certification.

Find out more Configure now
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Large Greenhouses For Sale UK

Key Facts

  • Our large Greenhouses are modular, so can be altered in length to a size which is right for you;
  • Staging and shelving which is tailored to your specification;
  • High eaves and high ridge equated to more even air temperature;
  • Sophisticated automatic greenhouse ventilation system

“Buy the Biggest greenhouse you can afford” is the advice which is often given by experienced gardeners. It is a decision that you won’t regret, as you’ll find that you find that yourself wishing for more space before you know it!

Having a big greenhouse in your garden is a luxury, and here at Cultivar we have devised a clever system that allows us to offer large greenhouses for sale of infinite length. These are available in three standard widths with the largest being an impressive 10ft 7 inches (3218mm) wide and with a high eaves and steeply pitched roof to allow plenty of head room.

We have devised the large greenhouses on offer to be modular, in modules of approximately 2ft 5 inches (750mm). This effectively means that you can extend the length of your custom built large greenhouse to a length which is right for you in increments of 750mm at a time.

Design & Price

Configure your greenhouse

Explore the range of stylish greenhouses designed to appeal to your tastes and growing needs.

Large Greenhouses

Modern Greenhouses Portrait Range

Width: 3218mm

Material: Accoya

Model: Plant House



Large Greenhouses

Modern Greenhouses Portrait Range

Width: 3218mm

Material: Aluminium

Model: Glass House



Large Greenhouses

Modern Greenhouses Portrait Range

Width: 3218mm

Material: Accoya

Model: Dwarf Wall



Large Greenhouses

Modern Greenhouses Portrait Range

Width: 3218mm

Material: Accoya

Model: Glass House



Large Greenhouses

Modern Greenhouses Landscape Range

Width: 3218mm

Material: Accoya

Model: Porch Dwarf Wall



Large Greenhouses

Modern Greenhouses Landscape Range

Width: 3218mm

Material: Accoya

Model: Pavilion Plant House



Large Greenhouses

Victorian Greenhouses Landscape Range

Width: 3218mm

Material: Accoya

Model: Porch Plant House



Large Greenhouses

Modern Greenhouses Landscape Range

Width: 3218mm

Material: Accoya

Model: Alcove Plant House




Did You Know?

The adjoining biomes located at the Eden Project feature in the Guinness World Records for being classified the biggest greenhouse in the World!

The combined size of the three biomes covers approximately 13 hectares which equates in size to 35 full Football pitches.


Commercial Greenhouses

If you are looking for an extra large commercial greenhouse for sale, then you may wish to take advantage of our modular glasshouse range.

We are able to extend the length of our modular constructions to whatever length is specified by our customers. So regardless of whether you need a residential or commercial size greenhouse, we are confident that we can put together the perfect design based on your requirements.

If you are considering buying a residential or commercial Greenhouse from Cultivar, then feel free to read on and explore the design possibilities listed below.


Your Choice of Materials

At Cultivar we produce a range of large greenhouses in a choice of aluminium or wood. We only use Accoya wood in the manufacture of our greenhouses.

This is a Class 1 Durability Timber which is designed to be ultra strong and long lasting in any weather conditions. In fact, it is virtually rot proof and has a 70 year service life according to TRADA. If you are concerned about the environmental impact, then don’t be. All of the Accoya wood that we use comes from well managed sustainable sources.

Regardless of whether you opt for an Accoya wood or Aluminium metal greenhouse, you can be sure that you will be buying a high quality product when you buy a large greenhouse from Cultivar.


Configure Your Large Greenhouse

Explore our range of large Greenhouse styles below to get a better idea of the design possibilities available to you when you buy from Cultivar.

With our extra large greenhouse designs, we are able to offer models with style and practical double doors. This is just one of the many advantages which come when you opt for a big greenhouse model.

We are confident that we can help you put together the perfect greenhouse for your requirements, regardless of whether you are a private or commercial buyer. Our dedicated team will be on hand every step of the way and are happy to take on the hard work so that you can just look forward to getting that big greenhouse you had always wanted.

Take advantage of our greenhouse configuration tool below. You can start by letting us know your preferred style…

Greenhouse features and highlights

Take a look in detail at what makes our greenhouses the most advanced in the World. Observe the clean lines, free from fixings. See the superior ventilation in action and how we combine modern materials to produce a unique and attractive greenhouse.

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Water collection

A reliable source of pure water

High capacity, strong aluminium gutters will carry the rain from your greenhouse roof to provide the water that will ensure your plants will thrive. Our securely fixed gutter and downpipes which can be adjusted to length will allow you to collect this precious commodity in your waterbutt. Whether you choose to collect or discharge the water Cultivar provide the means.

Design and price your greenhouse
x

Frames

Our unique glasshouse frames

Wide 750mm toughened safety glass panels set into slim aluminium frames give plants the warmth, light and ultraviolet light required for promising propagation. The frames are designed based on modern sophisticated window frame principles but miniaturized to allow more light. The glass rests between EPDM gaskets which allow the glass to expand when it gets hot but makes sure the glass is securely and snugly held in place with no rattles. The framework is powder coated in quartz grey, RAL7039, for a maintenance free finish.

Design and price your greenhouse
x

Traditional look

Modern materials

Accoya is not only attractive, maturing to a grey patina, but is long lasting and dimensionally stable. The perfect tongue and groove boarding is machined to our exclusive design as we need consistency of quality and boards that will not warp, twist or bow. Twinned with automated low level ventilation the Plant House is both good looking and talented.

Design and price your greenhouse
x

Low level ventilation

Full length even air flow

Automated vents located at the plinth level run the entire length of each side of the greenhouse, providing more than enough ventilation. These automated flaps will provide the very best growing conditions. The autovents react to increased air temperature to ensure that your plants are not exposed to extreme temperatures.

Design and price your greenhouse
x

Eaves vents

Frameless and made from toughened safety glass

In the instance that you are building a dwarf wall on which to sit your greenhouse we offer full length eaves ventilation. These run the entire length of both sides of the greenhouse and are operated manually with a simple central opener. Like the roof ventilation these are frameless and made from 6mm toughened safety glass. The edges of the vents are polished and the corners are designed with a radius for safety. Automatic openers can be exchanged for manual openers should you desire.

Design and price your greenhouse
x

Staging and shelving

Utility, practicality and versatility

Work benches have never been so thoughtfully designed and have probably never been so strong and versatile. When installed the slatted aluminium surface will support all your plants. You can choose to have the staging down one or both sides depending upon your growing plans. If you would like a softer surface then our aluminium slats can be replaced by Accoya, an aesthetically pleasing, strong and reliable alternative. If you would like a sand bed or pea gravel then that’s no problem, just call us to discuss your needs. You can also buy online a ABS Plastic Tray for the 8 and 10 foot wide models which can be used for potting up or to soak your pots.

There is also a hidden advantage, your staging can be folded down, just remove the tray and it will pivot down in a flash with the external frame. If you prefer you can unhook the staging for complete removal. This will create a space should you wish to grow tomatoes during the summer months. The shelves adopts a similar range of options and facility.

The practical and attractive framework is finished in quartz grey, RAL7039, to co-ordinate with the greenhouse.

Design and price your greenhouse
x

Accoya framework

Strong, stable and natural

Accoya is obtained from fast growing sustainable sources including FSC, it is treated with natural occurring acetic acid which modifies the core producing a hard, dimensionally stable, beautiful solid wood, exceeding the qualities of tropical hardwoods. Its consistency and durability (up to 50 years) is perfect for outdoor use.

Design and price your greenhouse
x

Ridge ventilation

Frameless clear glass full length roof vents

Air circulation starts low down in our greenhouse but hot exhausted air can escape through the handsome full length ridge vents, located on both sides of the greenhouse for optimum air flow. Plants love air movement, you will be rewarded if you offer plenty of fresh air. To this end our vents are automated with heat sensitive cylinders and strong spring mechanisms. 6mm toughened clear glass panels allow maximum light and the openers allow maximum ventilation.

Design and price your greenhouse
x

The ultimate greenhouse door

Tight Fitting, Soft Closing with Sensible Handles, Locks, Hinges and Hold Backs

Door jammed or loose on it’s runners ? Not with a Cultivar Door. This class beating door wide enough for a wheelbarrow and on the 8 and 10ft models good for wheelchair access with a low threshold. It’s solid aluminium frame elegantly sits within a wooden Accoya framework. Glazed uppermost with toughened safety glass whilst the lower section has heavy duty Accoya wood paneling, it’s designed for a lifetime of hard work.

Not your typical greenhouse door, this one is secure, a high specification Eurolock (with spare keys), a quality handle, inside and out, hinges that will comfortably carry the weight of the door opening to 180 degrees where a push action will keep the door secured back and a pull will release when the day is done.

Design and price your greenhouse
x

Safety glass throughout

Clearly the best

Forget delicate 2mm horticultural glass, broken storm damaged panes. Other than boulders there is not much that will break our 4mm toughened safety glass. Captured securely our strong frames and rigid construction will further protect the glass. Like all safety glass it will not shatter into shards but into small crystals which can be swept up. In any case it’s a one in a million chance but easily remedied by a simple replacement method. Designed to last a lifetime 4mm or 6mm toughened safety glass to British Standards is used throughout a Cultivar Greenhouse.

Design and price your greenhouse
x

Small details make a big difference

All our roof and wall glazing frames have a groove, seen as a shadow line, known in the trade as a screw port. This has been designed with the grower in mind so you can fix, tie and hang plants or tools securely in position. No drilling required.

Our video shows just how easy this is using two proprietary fixings which can be bought online from the likes of amazon or ebay. A little creative thinking may suggest other solutions and uses. For instance, a simple screw with twine around the head would hold up your tomatoes or your electrician may use P-clips screwed into the groove to route your wiring.

The most important piece of information is however here. The screws should be stainless steel, self tapping, 4.2mm (no.8) gauge. The depth of the groove is 8mm, it cannot be tightened beyond this. A variety of screws may be required to suit your plans.

The parts featured in the video were purchased through ebay using the descriptions below :

  • Nylon Lacing Mushroom secured with
  • DIN7981 Pozi Panhead Self Tapping Screws – 4.2mm by 19mm
  • 5mm Marine Stainless Steel Oblong Boat Pads secured with
  • Pozi Panhead Flanged Self Tapping Screws – 4.2mm by 10mm
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Build a base

Matching or contrasting

The traditional dwarf wall greenhouse can be given a new look for the new century. Glazed bricks in a wide choice of colours would create quite a stir if you chose to contrast your new pastime and hobby centre to the appearance of your home. Brick bases can be a sensible but long term choice for the enthusiastic gardener, a sign of serious intent.

Furthermore brick wall greenhouses give a more even temperature throughout the structure, they’re slower to heat up and slower to cool. If you are seeking this option then discuss with your builder the plans for your new greenhouse base.

This dwarf wall greenhouse page might give you some inspiration as to the sort of bricks available.

Design and price your greenhouse Building your base

Water collection 1

A reliable source of pure water

High capacity, strong aluminium gutters will carry the rain from your greenhouse roof to provide the water that will ensure your plants will thrive. Our securely fixed gutter and downpipes which can be adjusted to length will allow you to collect this precious commodity in your waterbutt. Whether you choose to collect or discharge the water Cultivar provide the means.

Design and price your greenhouse

Frames 2

Our unique glasshouse frames

Wide 750mm toughened safety glass panels set into slim aluminium frames give plants the warmth, light and ultraviolet light required for promising propagation. The frames are designed based on modern sophisticated window frame principles but miniaturized to allow more light. The glass rests between EPDM gaskets which allow the glass to expand when it gets hot but makes sure the glass is securely and snugly held in place with no rattles. The framework is powder coated in quartz grey, RAL7039, for a maintenance free finish.

Design and price your greenhouse

Traditional look 3

Modern materials

Accoya is not only attractive, maturing to a grey patina, but is long lasting and dimensionally stable. The perfect tongue and groove boarding is machined to our exclusive design as we need consistency of quality and boards that will not warp, twist or bow. Twinned with automated low level ventilation the Plant House is both good looking and talented.

Design and price your greenhouse

Low level ventilation 3

Full length even air flow

Automated vents located at the plinth level run the entire length of each side of the greenhouse, providing more than enough ventilation. These automated flaps will provide the very best growing conditions. The autovents react to increased air temperature to ensure that your plants are not exposed to extreme temperatures.

Design and price your greenhouse

Eaves vents 3

Frameless and made from toughened safety glass

In the instance that you are building a dwarf wall on which to sit your greenhouse we offer full length eaves ventilation. These run the entire length of both sides of the greenhouse and are operated manually with a simple central opener. Like the roof ventilation these are frameless and made from 6mm toughened safety glass. The edges of the vents are polished and the corners are designed with a radius for safety. Automatic openers can be exchanged for manual openers should you desire.

Design and price your greenhouse

Staging and shelving 4

Utility, practicality and versatility

Work benches have never been so thoughtfully designed and have probably never been so strong and versatile. When installed the slatted aluminium surface will support all your plants. You can choose to have the staging down one or both sides depending upon your growing plans. If you would like a softer surface then our aluminium slats can be replaced by Accoya, an aesthetically pleasing, strong and reliable alternative. If you would like a sand bed or pea gravel then that’s no problem, just call us to discuss your needs. You can also buy online a ABS Plastic Tray for the 8 and 10 foot wide models which can be used for potting up or to soak your pots.

There is also a hidden advantage, your staging can be folded down, just remove the tray and it will pivot down in a flash with the external frame. If you prefer you can unhook the staging for complete removal. This will create a space should you wish to grow tomatoes during the summer months. The shelves adopts a similar range of options and facility.

The practical and attractive framework is finished in quartz grey, RAL7039, to co-ordinate with the greenhouse.

Design and price your greenhouse

Accoya framework 5

Strong, stable and natural

Accoya is obtained from fast growing sustainable sources including FSC, it is treated with natural occurring acetic acid which modifies the core producing a hard, dimensionally stable, beautiful solid wood, exceeding the qualities of tropical hardwoods. Its consistency and durability (up to 50 years) is perfect for outdoor use.

Design and price your greenhouse

Ridge ventilation 6

Frameless clear glass full length roof vents

Air circulation starts low down in our greenhouse but hot exhausted air can escape through the handsome full length ridge vents, located on both sides of the greenhouse for optimum air flow. Plants love air movement, you will be rewarded if you offer plenty of fresh air. To this end our vents are automated with heat sensitive cylinders and strong spring mechanisms. 6mm toughened clear glass panels allow maximum light and the openers allow maximum ventilation.

Design and price your greenhouse

The ultimate greenhouse door 7

Tight Fitting, Soft Closing with Sensible Handles, Locks, Hinges and Hold Backs

Door jammed or loose on it’s runners ? Not with a Cultivar Door. This class beating door wide enough for a wheelbarrow and on the 8 and 10ft models good for wheelchair access with a low threshold. It’s solid aluminium frame elegantly sits within a wooden Accoya framework. Glazed uppermost with toughened safety glass whilst the lower section has heavy duty Accoya wood paneling, it’s designed for a lifetime of hard work.

Not your typical greenhouse door, this one is secure, a high specification Eurolock (with spare keys), a quality handle, inside and out, hinges that will comfortably carry the weight of the door opening to 180 degrees where a push action will keep the door secured back and a pull will release when the day is done.

Design and price your greenhouse

Safety glass throughout 8

Clearly the best

Forget delicate 2mm horticultural glass, broken storm damaged panes. Other than boulders there is not much that will break our 4mm toughened safety glass. Captured securely our strong frames and rigid construction will further protect the glass. Like all safety glass it will not shatter into shards but into small crystals which can be swept up. In any case it’s a one in a million chance but easily remedied by a simple replacement method. Designed to last a lifetime 4mm or 6mm toughened safety glass to British Standards is used throughout a Cultivar Greenhouse.

Design and price your greenhouse

Build a base 9

Matching or contrasting

The traditional dwarf wall greenhouse can be given a new look for the new century. Glazed bricks in a wide choice of colours would create quite a stir if you chose to contrast your new pastime and hobby centre to the appearance of your home. Brick bases can be a sensible but long term choice for the enthusiastic gardener, a sign of serious intent.

Furthermore brick wall greenhouses give a more even temperature throughout the structure, they’re slower to heat up and slower to cool. If you are seeking this option then discuss with your builder the plans for your new greenhouse base.

This dwarf wall greenhouse page might give you some inspiration as to the sort of bricks available.

Design and price your greenhouse Building your base

Small 10

All our roof and wall glazing frames have a groove, seen as a shadow line, known in the trade as a screw port. This has been designed with the grower in mind so you can fix, tie and hang plants or tools securely in position. No drilling required.

Our video shows just how easy this is using two propriety fixings which can be bought online from the like of amazon or ebay. A little creative thinking may suggest other solutions and uses. For instance, a simple screw with twine around the head would hold up your tomatoes or your electrician may use P-clips screwed into the groove to route your wiring.

The most important piece of information is however here. The screws should be stainless steel, self tapping, 4.2mm (no.8) gauge. The depth of the groove is 8mm, it cannot be tightened beyond this. A variety of screws may be required to suit your plans.

The parts featured in the video were purchased through ebay using the descriptions below :

  • Nylon Lacing Mushroom secured with
  • DIN7981 Pozi Panhead Self Tapping Screws – 4.2mm by 19mm
  • 5mm Marine Stainless Steel Oblong Boat Pads secured with
  • Pozi Panhead Flanged Self Tapping Screws – 4.2mm by 10mm