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GardenSera – High-Volume Knock-Down Hobby Greenhouse
The GardenSera High-Volume Knock-Down Hobby Greenhouse is a high-volume greenhouse structure designed for gardens and large open spaces.
Indicative price · from
€4 305 / $4 970
Indicative ex-works İstanbul price, excluding VAT, freight and duties. Converted from the TRY list price at the rate shown; confirmed on the quotation.
rate as of: 2026-09-15
Overview
The GardenSera High-Volume Knock-Down Hobby Greenhouse is a high-volume greenhouse structure designed for gardens and large open spaces, made from hot-dip galvanised steel or aluminium sections whose parts are bolted together on site. It is not a heating appliance — it is an enclosed volume in which a climate is created; the heating side is built up from separate products. Its high roof lets you work standing up, grow tall plants and set out shelving and propagation benches. With UV-protected polycarbonate, high-density greenhouse film or toughened glass cladding options, optional automatic ventilation and ISITMAX greenhouse heating products, it is suited to production all year round.
At a glance
Hot-dip galvanised frameGalvanised steel or aluminium sections, sized according to structural calculations.
Bolted, knock-down structureNo welding on site. Erected with standard hand tools and, if needed, dismantled and moved.
High roof, generous internal volumeLeaves room to work standing, for climbing plants, shelving and propagation benches.
CE-certified manufacture, 2-year warrantyOur own production since 1995. Delivery throughout Türkiye. Technical support Monday–Saturday 09:00–17:00.
Where it is used
Gökkuşağı
The standard arched form, the starting point for gardens
Medium to high volume with a spacious working area. The length is chosen between 4 and 10 metres; single or double doors and optional windows can be specified. It is the most popular form in the family.
Asya
Wider footprint and a height option
A form suited to varying climates. With its expandable modular structure it is the right starting point if you plan to extend later.
Maya
The semi-professional variant of the Asya form
It carries design differences; the interior is optimised around the working layout of semi-professional growers.
Kelebek
Top-level ventilation with a side-opening leaf system
The side leaves open so the whole volume is ventilated. The choice in hot regions, in compact gardens and for growing sensitive specialist plants that need ventilation.
Orkide
A small-scale, multi-purpose model
The smallest form in the family. Specified for balcony and small garden applications; it is a different scale from the high-volume configuration on this page.
Kamelya
Orkide scale, different form factor
Suited to short-term growing projects. Used for seasonal trial plots and temporary applications.
| Applications | Typical application |
|---|---|
| Garden production | Growing vegetables, fruit and flowers; starting the season earlier and continuing production through winter |
| Aromatic and medicinal plants | Year-round cultivation of species that need controlled humidity and temperature |
| Small-scale commercial production | Semi-professional growers producing seedlings, flowers and niche crops |
| Education and research | School and campus practical areas, trial plots, installation of measuring equipment |
Technical specifications
| Property | Value |
|---|---|
| Product type | Knock-down hobby greenhouse, greenhouse structureGreenMax greenhouse systems range |
| Model forms | Gökkuşağı · Asya · Maya · Kelebek · Orkide · KamelyaSix forms, one common engineering standard |
| Length | 4 – 10 metresFor the Gökkuşağı form; dimensions for other forms are given in the quotation |
| Footprint and area | Determined by the model form and the length selectedGiven in the quotation according to the width, length and entrance orientation of your site |
| Roof height | A high roof optimised to allow working while standingVaries by model form; given in the quotation |
| Frame material | Hot-dip galvanised steel or aluminium sections |
| Section size | Sized according to structural calculationsSection size and wall thickness are given in the quotation according to the model selected |
| Joint type | Bolted, knock-downNo welding, cutting or bespoke fabrication is needed on site |
| Cladding material | UV-protected polycarbonate · high-density greenhouse film · toughened glassThe glass option is considered on request |
| Cladding thickness and UV life | Determined by the cladding selectedSheet thickness, film micron rating and UV warranty period are given in the quotation |
| Snow and wind load | The frame is designed to structural calculationsSized for the snow and wind loads of your region — tell us the installation location before ordering |
| Door | Single or double doorOptional windows can be specified on the Gökkuşağı form |
| Ventilation | Natural ventilation through doors and windowsAutomatic ventilation is optional · side-opening leaf system on the Kelebek form |
| Fixing to the ground | Compacted soil, concrete plinth or perimeter beamWhich is right depends on the slope and soil conditions of the site |
| Structure type | Modular, suitable for extensionCan be dismantled and moved |
| Erection | Delivered knock-down, with an assembly manual in TurkishDone with standard hand tools by a team of several people |
| Package size and shipping weight | Varies with the model and cladding selectedBulky shipment — dimensions and weight are confirmed at order confirmation |
| Heating integration | Compatible with ISITMAX greenhouse heating productsHeating equipment consists of separate products and is not included in the price |
| Irrigation | Optional |
| Use | All four seasonsA balance between heating and ventilation must be established for winter use |
| Conformity | CE-certified manufacture |
| Warranty | 2-year manufacturer warranty |
| Barcode / SKU | 8683498832296 |
Is this the right product?
A good fit when
- You want a permanent greenhouse in your garden that you can work in standing up.
- You want to start the season earlier, close it later and produce through the winter months as well.
- You will be growing tall plants such as cordon tomatoes and cucumbers; a high roof is a genuine requirement for you.
- You plan to install shelving, propagation benches, an irrigation line and heating equipment inside.
- You grow aromatic and medicinal plants, seedlings or flowers, and want to extend the modular structure if the business grows.
Not the right choice when
- You are looking for a compact greenhouse for a balcony or small terrace — this configuration is garden scale and will not fit a confined space. In the GardenSera family, balcony scale is a separate model form.
- You only need to overwinter a few seedlings — creating a small, controlled temperature zone is far more economical than heating a whole volume; a heated seedling and sapling bench is the right product for that.
- You already have a greenhouse and are only looking for heating — you do not need a new structure but heating products to install inside it; the heating section below explains which one is right.
- You are building a multi-span greenhouse at commercial production scale — work on that scale is handled project by project and is not sold as a stock product.
- You have a site where no ground preparation is possible, or which is sloping or has not finished settling — the structure cannot be plumbed, the cladding cannot be tensioned and the joints are put under strain.
Installation
Yes, the structure is designed to be erected by yourself — but it is not a one-person job. The parts are bolted together on site following the assembly manual; no welding, cutting or bespoke fabrication is needed and standard hand tools are enough. It is, however, bulky work: lifting the sections, seating the arches and plumbing the frame call for a team of several people. An installation service can be arranged separately on request.
Ventilation balance: In an enclosed volume, humidity has to be managed as well as temperature. Closing the ventilation completely while heating increases the risk of condensation and fungal disease. Allow controlled air changes during the day in winter too; the automatic ventilation option exists so that you do not have to manage this by hand. The side-opening leaf system of the Kelebek form is the strongest answer to this need.
Ordering and delivery
- dimensions and site confirmationSite details, model and configuration
- cladding, door and ventilation choicesOrder confirmation
- according to the production scheduleProduction and packing
- throughout TürkiyeDispatch
- once the ground is readySite erection
Warranty and support
ISITMAX has manufactured electric heating products in its own facility since 1995. The GardenSera High-Volume Knock-Down Hobby Greenhouse belongs to the GreenMax greenhouse systems range and is designed to work together with ISITMAX greenhouse heating products.
Frequently asked questions
What are the dimensions of the GardenSera High-Volume Knock-Down Hobby Greenhouse?
The dimensions depend on the model form you choose; on the arched Gökkuşağı form the length is selected between 4 and 10 metres. The footprint width, ridge height and door arrangement are determined by that length and the shape of the site, and are confirmed in writing in the quotation. The price on this page is for a single configuration — share the width, length and entrance orientation of your site and we will work out together which model fits.
Can I erect it myself, and how many people are needed?
Yes, the structure is bolted and knock-down; it comes with a Turkish assembly manual, needs no welding or bespoke fabrication and is erected with standard hand tools. It is, however, bulky work: lifting the sections and plumbing the frame call for a team of several people and are not safe for one person alone. An installation service can be arranged separately on request.
How do I fix the greenhouse to the ground — is a concrete foundation essential?
No, a reinforced concrete foundation is not essential — a knock-down greenhouse is fixed by one of three methods: compacted soil, a concrete plinth or a perimeter beam. Which is right depends on the slope of the site, the soil conditions and the cladding you choose; toughened glass is the heaviest cladding and puts the greatest load on the ground. In all three cases the ground must be level, settled and free draining.
Will it withstand wind and snow loads?
The frame is designed to structural calculations and made from hot-dip galvanised sections; it is not in the same class as lightweight tent-type greenhouses that last a season or two. Because snow and wind loads vary by region, the sizing is done for the installation location — tell us the province and the site before ordering.
Is planning permission needed for a knock-down greenhouse?
A knock-down greenhouse is a demountable structure and, because it may be assessed differently from a permanent building, permission may not be required in some cases. This varies with the region, the classification of the land and the size of the structure; binding information must be obtained from your local authority. Our product documentation gives no undertaking on this point.
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