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TETRA – quadrangular greenhouse, orangery

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An attractive square-shape garden glasshouse - for different uses and users.

This conservatory-greenhouse-garden room has a square shape. This allows maximum use of the inner space. Corners will provide enough space not only for larger plants but also for shelves, a potting table, and a chair.

The conservatory has broad double sliding doors.


Tetra tetra extra orangery greenhouse Gardenis


  • – The prices indicated below are for a standard greenhouse set of a standard size (W x L x H), mill finish aluminium frame with 4 mm clear tempered glass or 10 mm clear polycarbonate, with integrated aluminium base, condensation and rainwater gutters, downpipes, double sliding door, wall windows.
  • Painting the structure in RAL colour (powder coating, Qualicoat technology) costs extra (see the last column).
  • Delivery services cost extra, and are quoted separately; the price depends on the ordered greenhouse size and distance to the delivery address.
  • Special offer: in May all standard-size greenhouses and orangeries with glass glazing – 10 % (on mill finish structure)



For more useful information visit our F.A.Q. (Frequently asked questions) section.

  • 10 mm polycarbonate (clear)
  • 4 mm frosted texture glass
  • 4 mm tempered glass

Robust aluminium structure

The frame of the greenhouse is made of closed-type, solid aluminium profiles. Fasteners (bolts and nuts) – of stainless steel. The whole construction is stable and strong. Aluminium is a light but strong, durable metal. It does not rust, is resistant to moisture and sun, and does not require any special care.

Much attention is paid to finishing elements and aesthetics.

The structure is fully prepared for self-assembly (detailed assembly instruction is included in the package). There is no need to drill, cut or press anything when assembling the greenhouse.

High and spacious greenhouse

When choosing a greenhouse, it is important to consider the height of its side walls. The higher the walls, the more space inside the greenhouse. This not only provides more necessary space for the plants, their arrangement, but also ensures better air circulation inside the greenhouse; in such a greenhouse it is more comfortable to both work and rest.

The standard height of the sidewalls of the “TETRA” model greenhouse is 2,05 m. If you want an even higher greenhouse, order with a +20 cm higher side wall (the overall height of the greenhouse, and door passage height also change accordingly). Possible sidewall heights of “TETRA” greenhouses: 2,05 m (standard offer), 2.25 m.

Save space on the plot by taking advantage of the height of the greenhouse: don’t plant more seedlings – allow the plants to grow to the maximum upwards (eg tall tomatoes, cucumbers, vines, others); attach large, sturdy shelves to the side walls for potted plants, strawberries, lettuce, herbs.

Frame colour

The general aesthetic appearance of greenhouses is greatly influenced by their shape, glazing, and especially the colour of the structure. While natural aluminium (mill finish – unpainted) greenhouses remain the most popular, colour frame greenhouses are popular as well.

The profiles in the standard greenhouse set are mill finish. By the customer’s request, for an additional fee, we will offer all frame profiles powder coated (Qualicoat technology) in the desired colour of RAL palette.


Large windows (73×82 cm) ensure good ventilation of the greenhouse. The windows can be installed on any wall of the greenhouse. If necessary, you can purchase an additional window (-s) separately.

We recommend purchasing automatic window vents (see menu section “Accessories”).

Gutters and downpipes

Rainwater and moisture condensate gutters and rainwater downpipes are integrated into the greenhouse construction. All rainwater flowing from the roof will be collected and will run out through two downpipes. It is convenient to direct this stream to special water tanks and thus provide water for watering the greenhouse plants.


The standard “Tetra” includes one set of sliding double door.

An additional set of hinged or sliding door (single, double) can be ordered and installed in any wall.



The standard set includes an H-14.5 cm aluminium base.

The base can be anchored to the soil or to any other surface (bricks, concrete, stone, wood).

Another type of base profile (a”plate”) will be supplied if a greenhouse will be built on a brick or concrete foundation wall.


– Alu shelf W-20 cm

Greenhouse shelves allow for optimum use of the greenhouse space, and more efficient storage of plant care products.

– Alu loops

Convenient and effective greenhose accessory to tie up tomato, cucumber, vine or any other plants or small decorations

– Automatic window opener

Save yourself time and effort - fit automatic vent openers in your greenhouse.

– Extra windows, doors

When more intensive ventilation in your greenhouse is needed

– Alu tubes

A convenient way to tie plants in the greenhouse.

– Wooden raised beds

Enjoy your tiny garden anywhere - on a terrace, on a balcony, in a greenhouse!

– Alu shelf – frame

Make the most of your greenhouse space. Comfortable greenhouse shelves for plants, order, convenience, coziness.

Any questions?

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