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Polycarbonate Greenhouses
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Polycarbonate greenhouse kits for Australian gardens. Every greenhouse here is a Winter Gardenz kitset: a powder-coated aluminium frame glazed in twin-wall polycarbonate that resists hail, holds warmth on cold nights and diffuses harsh sun so plants are less likely to scorch. Choose by width, because width sets the layout: 6ft suits a single bench and a small courtyard, 8ft gives benches down both sides with a central path, and 10ft leaves room for potting and taller crops.
Every kit ships Australia-wide and is backed by our price-match promise and after-care. Need a heater, shelving or a shade cover? Browse greenhouse accessories. If you are weighing polycarbonate against glass or working out what size to buy, read the polycarbonate greenhouse buying guide.
Greenhouse kit FAQs
Are polycarbonate greenhouses good for Australian conditions?
Yes. UV-stabilised polycarbonate resists hail impact that would crack glass, insulates better than single glazing and diffuses harsh sun to reduce scorching. Paired with a powder-coated aluminium frame, it stands up to sun, wind and coastal air far better than a budget kit.
What size greenhouse kit should I buy?
Choose by width. A 6ft width suits a single bench and a small space, 8ft allows benches on both sides with a central path, and 10ft gives room for benches, potting and taller crops. Length can often be extended in bays later.
What do I need to prepare before a greenhouse arrives?
A level, well-anchored base. A firm, level footing and proper ground anchoring matter most in wind, so prepare the base before the kit arrives rather than relying on the greenhouse's weight alone.
Buying guide
Which polycarbonate greenhouse to choose
For a courtyard or a first greenhouse, choose the 6ft Wide Polycarbonate Greenhouse (from $2,635). For room to work a full bench of seedlings, choose the 8ft Wide (from $3,295). For serious year-round growing, choose the 10ft Wide (from $5,935), or the 10ft MultiZone Growhouse (from $9,895) when you want a warm propagation zone and a cool shaded zone in one house. Prefer glass over polycarbonate? The fully-equipped Elite range (from $10,555) is 4mm toughened safety glass.
A polycarbonate greenhouse is a growing house glazed in twin-wall polycarbonate rather than glass: two skins of rigid plastic with an insulating air gap between them. My Acre's range is built by Winter Gardenz on a heavy-duty black aluminium frame, glazed in 6mm twin-wall polycarbonate that holds heat overnight and stands up to Australian wind, hail and UV. Widths run 6ft, 8ft and 10ft, in lengths from 6ft to 36ft, so the house grows with your garden.
Which to choose
| Model | Price from | Glazing | Widths & lengths | Best for |
|---|---|---|---|---|
| 6ft Wide Polycarbonate | $2,635 | 6mm twin-wall polycarbonate | 6ft wide, 6ft to 24ft long | Courtyards, balconies and a first greenhouse |
| 8ft Wide Polycarbonate | $3,295 | 6mm twin-wall polycarbonate | 8ft wide, 6ft to 24ft long | A full bench of seedlings with room to move |
| 10ft Wide Polycarbonate | $5,935 | 6mm twin-wall polycarbonate | 10ft wide, 8ft to 36ft long | Serious year-round growing and walk-down beds |
| 10ft MultiZone Growhouse | $9,895 | 6mm twin-wall polycarbonate + shade mesh | 10ft wide, multiple lengths | Two climates in one house: warm propagation and cool shade |
| Elite 8ft (glass) | $10,555 | 4mm toughened safety glass | 8ft wide, 10ft to 24ft long | A glass house, fully fitted with auto vents and shelving |
| Elite 10ft (glass) | $14,515 | 4mm toughened safety glass | 10ft wide, 10ft to 24ft long | The largest glass house, fully equipped |
Choose by width first: 6ft for compact spaces, 8ft to stand and work comfortably, 10ft for serious growing. Then by glazing: 6mm twin-wall polycarbonate for insulation, value and hail resistance; 4mm toughened glass (the Elite range) for clarity and a premium finish.
Polycarbonate vs glass: which is better for a greenhouse?
Polycarbonate is the better all-rounder for most Australian gardens: twin-wall polycarbonate insulates far better than single glazing, diffuses light so plants don't scorch, and shrugs off hail where glass shatters. Glass wins on clarity and looks, and lasts decades without clouding. Both ranges here sit on the same heavy-duty aluminium frame, so the real choice is insulation and toughness (polycarbonate) against clarity and finish (the toughened-glass Elite).
| 6mm twin-wall polycarbonate | 4mm toughened glass (Elite) | |
|---|---|---|
| Insulation | Better: two skins and an air gap hold overnight heat | Lower: single pane loses heat faster |
| Light | Diffused, even light; less leaf scorch | Maximum clarity and brightness |
| Hail & impact | High resistance; flexes rather than shatters | Toughened, but can break on heavy impact |
| Longevity | UV-protected; may soften in tint over many years | Stays clear for decades |
| Price from | $2,635 | $10,555 |
Why Winter Gardenz
Winter Gardenz greenhouses are engineered for the wind, sun and hail of the Southern Hemisphere, not imported flat-pack kits built for milder climates. Every house pairs a heavy-duty black aluminium frame with 6mm twin-wall polycarbonate or 4mm toughened glass; the Elite range arrives fully fitted with auto-opening roof vents, integrated shelving, a shade cover and hinged lockable double doors.
Growing year-round in the Australian climate
A twin-wall polycarbonate greenhouse extends the season at both ends: it holds enough overnight warmth to start seedlings weeks earlier in spring; its diffused light and roof venting keep growing manageable through summer heat. Cool-season crops like lettuce, spinach and brassicas keep going through winter, while tomatoes, chillies and cucumbers get a longer, warmer run than they would outdoors. Match the house to your space, add auto vents for hot days, then you have a productive garden every month of the year.
Polycarbonate greenhouse FAQs
Tap a question to read the answer.
Are polycarbonate greenhouses any good?
Yes, and for most home gardeners they are the better choice over glass. Twin-wall polycarbonate insulates better, so the house holds overnight heat for earlier and later growing; it diffuses light so plants are less likely to scorch; and it resists hail and knocks that would shatter glass. Winter Gardenz houses use 6mm twin-wall polycarbonate on a heavy-duty aluminium frame built for Australian conditions.
Is polycarbonate or glass better for a greenhouse?
Polycarbonate is the better all-rounder: more insulation, softer diffused light and far better hail and impact resistance. Glass offers maximum clarity and a premium look and stays clear for decades. If insulation, value and toughness matter most, choose polycarbonate; if you want a glass house and a fully-equipped finish, the toughened-glass Elite range is the one.
What thickness of polycarbonate is best for a greenhouse?
6mm twin-wall is the practical sweet spot for a year-round greenhouse and the thickness Winter Gardenz uses across this range. It gives real insulation from the air gap between the two skins while staying light enough for the frame and easy to panel. Thinner 4mm sheet is common on cheap kits but insulates and lasts less well.
Will a polycarbonate greenhouse survive hail and strong wind?
Yes. Twin-wall polycarbonate flexes under hail rather than shattering, which is a real advantage over glass in Australian storms; Winter Gardenz builds on a heavy-duty black aluminium frame engineered for wind. Anchor the base properly to a level, stable footing and keep the roof vents in good order.
What size greenhouse do I need?
Choose by width first. The 6ft wide suits courtyards, balconies and a first greenhouse; the 8ft wide gives room to stand and work a full bench of seedlings; the 10ft wide is for serious year-round growing with walk-down beds. Every width comes in several lengths (from 6ft up to 36ft on the 10ft wide), so you can size the house to your garden and budget.
Can I grow all year round in a polycarbonate greenhouse in Australia?
Yes. The twin-wall insulation holds overnight warmth to start seedlings earlier in spring and carry cool-season crops like lettuce, spinach and brassicas through winter, while roof venting and diffused light keep growing manageable in summer. It extends the season at both ends across most of Australia.
Do the greenhouses come with vents and shelving?
The Elite glass range arrives fully fitted with auto-opening roof vents, integrated shelving, a shade cover and hinged lockable double doors. The polycarbonate range includes roof venting; talk to us about adding auto vent openers and staging to suit how you plan to grow.
Are these greenhouses hard to assemble?
They arrive as a kit with instructions and are designed for owner assembly on a prepared, level base. The larger 10ft houses are a bigger build and easier with a second pair of hands. If you would rather not build it yourself, ask us about installation.
Not sure where to start?
Tell us about your space and we'll suggest what suits.
















