Sungrow 20 Greenhouse

The Sungrow 20 Greenhouse packs the strength of a professional-grade structure into a size that suits the average Australian backyard. At roughly 10′ wide x 20′ long — around 18.5m² of growing space — it’s spacious enough for serious year-round gardening, yet compact enough for urban and suburban yards where a larger greenhouse won’t fit. Built on a heavy-duty, rust-resistant galvanised steel frame and glazed with 6mm double-wall polycarbonate, it’s engineered to stand up to tough Australian conditions while keeping your plants protected.

Like the rest of the Sungrow range, the 20 uses a bell-shaped profile that lets wind, rain and hail slide straight off the curved sides. The 6mm twin-wall polycarbonate panels insulate well for steadier temperatures and block 100% of harmful UV, with a UV-protected outer layer that keeps them performing for years.

 Why Choose the Sungrow 20 Greenhouse

The Sungrow 20 hits the sweet spot between space and footprint. You get a tall 8 ft roof for comfortable working room and trellising, split doors at both ends for excellent through-ventilation on hot days, and a galvanised steel frame that’s wind-resistant to around 100km/h when properly anchored — serious durability for an exposed or breezy site. And because the Sungrow is modular, you’re not locked in: you can extend the length in sections later if your growing needs expand.

H2: Key Features

• Spacious 10′ x 20′ footprint — around 18.5m² of growing area
• Heavy-duty, rust-resistant galvanised steel frame
• 6mm double-wall polycarbonate panels with UV-protected exterior
• 100% protection from harmful UV rays
• Bell-shaped design sheds wind, rain and hail
• Wind-resistant to approximately 100km/h (65 mph)
• Split doors at both ends for excellent end-to-end ventilation
• Two manual windows, with the option to add automated vents
• Tall 8 ft roof for generous headroom and trellising
• Modular and extendable in sections
• Can be installed with or without a base
• Virtually maintenance-free
• 10-year limited warranty

H2: Dimensions and Specifications

• Width: approx. 3.0m (10′)
• Length: approx. 6.0m (20′)
• Height: approx. 2.4m (8′)
• Growing area: approx. 18.5m² (200 sq ft)
• Frame: heavy-duty galvanised steel (silver)
• Glazing: 6mm double-wall polycarbonate
• Doors: split doors at both ends, with windows above
• Wind rating: approx. 100km/h (65 mph)
• Warranty: 10-year limited

Browse our full greenhouse range and greenhouse accessories — including extension kits and automated vent windows — or speak with our team for advice on the right size for your site.

H2: Sungrow 20 vs Sungrow 26 — Which Size?

Both share the same heavy-duty galvanised frame, 6mm glazing and 10-year warranty — the difference is length and growing area. The Sungrow 20 (around 18.5m²) suits urban and suburban backyards and keen home growers. The Sungrow 26 (around 24m²) steps up to a larger footprint for high-volume or semi-commercial growing. Because both are extendable, you can also start with the 20 and lengthen it later. Choose based on your available space and how much you want to grow.

H2: Siting, Permits and Setting Up

Pick a level, well-drained, sunny spot, ideally orienting the longer side toward the sun’s path. Because the Sungrow is a substantial structure, check with your local council about whether a building or planning permit is required before you build — requirements vary by council and property. Anchor it securely (with or without a base) for stability in wind. For siting and orientation guidance, the Australian Government’s Your Home guide is helpful, and the Bureau of Meteorology can help you plan around local wind, sun and frost.

H2: What to Grow

With nearly 18.5m² of protected space, you can grow year-round — vegetables, fruit, flowers, seedlings and tender plants through the cooler months. For season-by-season advice tailored to Australian climates, Gardening Australia is an excellent, trusted resource.

H2: Frequently Asked Questions

How big is the Sungrow 20? Roughly 10′ wide x 20′ long x 8′ high — around 18.5m² of growing area with a tall, comfortable roof height.

What’s it made from? A heavy-duty galvanised steel frame with 6mm double-wall polycarbonate panels that block 100% of UV.

Can it be extended? Yes — the Sungrow is modular and can be extended in sections, so you can lengthen it later.

How does it handle the weather? The bell-shaped design sheds wind, rain and hail, and it’s wind-resistant to around 100km/h when properly anchored.

Do I need a permit? Possibly — a structure this size often requires council approval. Always check with your local council before building.

H2: Conclusion

Strong, spacious and sensibly sized, the Sungrow 20 Greenhouse brings heavy-duty, year-round growing to backyards that can’t fit a giant. With a galvanised steel frame, insulating 6mm polycarbonate panels, a weather-shedding bell design and the option to extend, it’s a greenhouse built to last and to grow with you. Browse the range or get in touch for expert advice today.

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