Buy a Greenhouse from Trade Tested

Turn your garden into a year-round growing space with a quality greenhouse. From raising healthy seedlings to keeping tropical plants alive through winter, a greenhouse gives you control over temperature, light, and protection from pests. At Trade Tested, our greenhouses are built to withstand New Zealand’s changing weather conditions, with UV protection, rust-proof aluminium frames, and easy-to-assemble kits delivered nationwide.

Why own a greenhouse?

A greenhouse opens up growing possibilities regardless of what the weather is doing.

Grow all year round: Extend your season for vegetables, herbs, and flowers.

Protect your plants: Keep them safe from frost, wind, and pests.

Boost success rates: Raise stronger seedlings and maintain consistent conditions.

Save money: Enjoy more home-grown produce and fewer trips to the supermarket.

How to select the right greenhouse

Size matters

If you’re short on space or budget, a compact option like a mini greenhouse is a great start. Otherwise, buy the largest greenhouse you can fit or afford, as most gardeners quickly fill smaller ones and wish they’d gone bigger.

Material selection

The covering of your greenhouse makes a big difference to plant health

Polycarbonate panels: Durable, virtually unbreakable, and UV-protected. They diffuse light to prevent scorching while holding warmth inside, giving you a stable, year-round environment.

Polyethylene film: Lightweight and budget-friendly, this covering creates a warm, humid environment that’s ideal for vegetables, herbs, and flowers.

Glass panels: Offers maximum clarity and excellent light transmission. Glass greenhouses look timeless and help plants thrive with abundant natural light.

Frames and structure

The frame is the backbone of your greenhouse, so choosing the right material is key.

Aluminium frames: Lightweight yet strong, naturally rust-proof, and low-maintenance. Easy to assemble and ideal for long-term durability.

Galvanised steel frames: Exceptionally sturdy and able to handle NZ’s high winds. The protective zinc coating resists corrosion, giving years of reliable use.

Timber framing: Offers natural insulation and a traditional look that blends beautifully into garden settings, while still providing solid structural support.

Ventilation and access

Adequate ventilation keeps plants healthy. All Trade Tested greenhouses come with roof vents to control temperature and humidity, while sliding or roll-up walls give you easy access and airflow.

Trade Tested’s greenhouse range

Polycarbonate greenhouses

Perfect for year-round gardeners, polycarbonate greenhouses combine UV-protected twin-wall polycarbonate panels with aluminium frames. Durable, light-diffusing, and backed by a manufacturer's warranty, they’re built to last more than 10 years.

Mini greenhouses

A cost-effective choice for small gardens, balconies, or beginners. Mini greenhouses are ideal for seed starting and extending your growing season without taking up too much room.

Tunnel houses

Popular with Kiwi gardeners, tunnel houses feature a polyethylene cover over a steel frame to create a versatile growing area. They’re great for vegetables, herbs, and flowers, with roll-up walls and vents for airflow.

Professional greenhouses

Our professional greenhouses are for serious horticulturists. These large-scale houses feature premium aluminium construction with glass or polycarbonate panels, offering maximum growing space, durability, and protection from NZ’s harsh weather.

Buy your greenhouse online today at Trade Tested

Ready to grow more, save more, and garden year-round? Trade Tested has a greenhouse to match your site, budget, and growing goals. While you’re here, make sure you explore our selection of greenhouse accessories. Got a question about our greenhouses? Either send us an email or give us a bell during office hours on 0800 800 880.

Browse our full range and buy your outdoor greenhouse online today. We’ll deliver directly to your door anywhere in New Zealand.

Real customer reviews & testimonials

“Just so thrilled with our mighty wee Greenhouse. It was super easy to assemble (with the cat’s help of course...). It's a perfect size for our narrow garden space down the side of the house. Yet it is surprising just how much we can fit into it. Seedlings and new plant starts are all successfully housed for the winter cold season. The cat does his daily seedling growth checks no matter the weather! So it's doing its job so well - best buy ever.”

“Great product, simple instructions for assemblies.”

“This is a fantastic buy - in fact, I have now bought two. I have one permanently set up in my garden, and I used the other one as a market stall for a festival! They are easy to assemble, sturdy, spacious, and very warm inside. My polytunnel garden is coming on well, and I am learning new things about growing in a polytunnel. A very good investment.”

FAQs about buying a greenhouse

What size greenhouse should I buy?

Make your selection based on available space and how many plants you plan to grow. If in doubt, go slightly larger as most gardeners find they quickly run out of room in smaller houses.

Do greenhouses need ventilation?

Yes. Roof vents and roll-up sides prevent overheating and aid in pollination by keeping air circulating.

Can I assemble a Trade Tested greenhouse myself?

Yes. All our kits come with clear instructions, and most customers can build them with basic tools.