Best 7 Greenhouse Sheds in Winnipeg

A greenhouse gives you somewhere to start seedlings, pot up herbs and keep tender plants out of the wind. A greenhouse shed adds the familiar feel of a backyard building: a door you can walk through, a place to work and room to organize your growing supplies.

For Winnipeg gardeners who want that shed-style space without taking on a kit-building project, Horizon Storage Sheds is our #1 pick. Its greenhouse comes with a floor, shelving, a clear polycarbonate roof and windows on three sides, while its team coordinates delivery and placement. Those are useful advantages when you want to spend your weekends gardening rather than assembling a frame.

These seven options include both greenhouse sheds and dedicated greenhouse kits sold into the Canadian market. We've put shed-style construction, included working space and a straightforward setup ahead of the lowest sticker price. This isn't a ranking of winter-growing performance, and not every supplier is based in Winnipeg.

1. Horizon Storage Sheds — Best Overall for a Shed-Style Greenhouse

Explore Horizon's Greenhouse Sheds →

Horizon is the strongest first call if you picture a proper backyard potting space rather than a greenhouse kit spread across the lawn. The company builds in Canada and delivers across Winnipeg and Manitoba. Its greenhouse design combines a shed frame and engineered wood siding with the light a growing space needs.

The standard features do much of the work for you. A clear polycarbonate roof brings in daylight, windows along three sides open up the growing area, and included shelving gives seed trays and pots a home. The white-painted interior helps reflect light. A plywood floor, treated floor joists and pressure-treated skids make this a different proposition from an open-bottom greenhouse frame.

There are two gable vents and a wooden transom door, with several sizes listed from 8 by 8 feet up to 12 by 20 feet. That gives you room to choose between a modest seed-starting space and a larger building with a more generous working aisle. Ask the team which greenhouse-specific options are available for the size you want; not every add-on offered for a storage shed will suit this model.

Horizon lists the 8-by-8-foot greenhouse at $6,520 and the 8-by-12-foot version at $8,150 on its greenhouse page. Treat those as starting points for a conversation, not a delivered total. Get a current Canadian-dollar quote covering your building, selected options, delivery and placement, and ask what site preparation remains your responsibility.

Our take: Horizon earns the top spot for someone who wants a shed-style greenhouse with the floor and working shelves already part of the design. If your goal is year-round production, ask different questions about heating and structural requirements before choosing any model.

2. Cedarshed Canada — Sunhouse for a Hands-On Cedar Project

Visit Cedarshed Canada →

Cedarshed's Sunhouse is one of the closer alternatives to a traditional greenhouse shed. It pairs cedar construction with angled light-transmitting wall panels, a Dutch door, a push-out window, workbenches and a plywood floor. Sizes include 8 by 8, 8 by 12, 8 by 16 and 12 by 12 feet.

The difference is how it gets from a shipment to a usable building. This is a panelized kit: the panels reduce the amount of cutting, but you still need to assemble the structure on your prepared site. Cedarshed recommends some carpentry skills. If you prefer Horizon's delivery-and-placement approach, the Sunhouse asks more of your time and tools.

Best fit: You like the cedar sunhouse look and are comfortable organizing the build.

3. Outdoor Living Today — Cedar Greenhouse With Automatic Roof Vents

Visit Outdoor Living Today →

Outdoor Living Today's Western Red Cedar Greenhouse is a Canadian-made kit available in nominal 8-by-8 and 8-by-12 sizes. It uses 6 mm twin-wall polycarbonate, includes cedar shelving and has heat-activated roof vents that open as the temperature rises. Those vents are a useful feature when spring sunshine warms a small growing space quickly.

It's still a construction project. The manufacturer estimates one to two days of assembly with two people, and the larger kit is a substantial freight shipment. Its direct product page also displays US-dollar prices, so Winnipeg buyers should confirm the Canadian-dollar amount and delivery terms instead of comparing the visible number straight across with Horizon's quote.

Best fit: You want cedar and automatic venting, and don't mind assembling a kit.

4. Grizzly Shelter — Canopia Natura for a Cedar-Frame Kit

Visit Grizzly Shelter →

Grizzly Shelter is a Canadian retailer with a wide greenhouse selection. Its Canopia Natura pairs a cedar frame with clear polycarbonate panels, a low-threshold entry and an automated roof vent. If you like the look of wood but want a dedicated glazed greenhouse, it's an option to compare.

However, the potting workspace isn't as complete as Horizon's standard package. Grizzly explicitly lists shelving and workbenches as optional accessories sold separately. Add those to the quote if you plan to start trays of seedlings, then account for the time and help needed to assemble the greenhouse.

Best fit: You want a cedar-framed greenhouse kit and are happy to choose the working accessories separately.

5. Planta Greenhouses — Sungrow for Growers Prioritizing Weather Specifications

Visit Planta Greenhouses →

Planta's Sungrow line puts the emphasis on growing space and structural specifications rather than shed styling. The Canadian site offers galvanized-steel frames and polycarbonate panels, with model-specific snow and wind ratings. The Sungrow 20 has an approximately 10-by-20-foot footprint, doors at both ends and anchoring options for suitable ground or a prepared foundation.

This is a more relevant comparison if weather ratings matter more to you than having a wooden, floored potting shed. It ranks below Horizon for our shed-style brief, not because steel construction is inherently worse. You'll need to assemble the kit and plan your beds, paths and working surfaces. Confirm the current freight charge, too: the product page says shipping is priced by location and order size.

Best fit: You want a dedicated growing structure and will compare the exact model's weather specifications.

6. NorthGreenhouses — House Polycarbonate Greenhouse for Kit Buyers

Visit NorthGreenhouses →

NorthGreenhouses offers a House Polycarbonate Greenhouse with a steel frame and 6 mm twin-wall panels, alongside other greenhouse and orangery designs. It advertises Canadian delivery and provides assembly information for buyers who want to put the structure together themselves.

The House model is listed at approximately 7.7 feet wide, with length choices. That footprint may suit some smaller yards, but it offers a different feel and layout from Horizon's wooden greenhouse shed. The seller estimates eight to twelve hours of assembly with two people. Before ordering, check the foundation instructions and what you'll use for benches and your working surface.

Best fit: You prefer a compact steel-and-polycarbonate kit over a wooden shed.

7. Home Depot Canada — Backyard Discovery Bellerose XL for a Larger Cedar Kit

Visit Home Depot Canada →

Home Depot Canada's greenhouse selection includes the Backyard Discovery Bellerose XL, listed as a 13-by-11-foot cedar greenhouse kit with a pergola and temperature-activated fan. It's a retail alternative if you want a larger garden feature and prefer comparing products through a familiar Canadian store.

The listing is an online purchase rather than an in-store model, so don't assume you can inspect it at a Winnipeg branch. Enter your postal code to check availability and delivery. You also need to organize the foundation and assembly; buying through a retailer isn't the same as working with Horizon on delivery and placement of a shed.

Best fit: You have space for a larger cedar kit and are prepared to manage the installation.

What Matters Most in a Winnipeg Greenhouse Shed?

Start with how you want to use the space. A place for spring seedlings and summer tomatoes is a different purchase from a heated winter greenhouse. Horizon's seasonal shed makes sense for the first brief; the second needs a separate discussion about structure, heating, insulation, ventilation and operating costs.

• Light and ventilation: Pick a sunny position and ask how the vents and doors manage daytime heat. More glazing doesn't remove the need for airflow or frost protection.
• Usable space: Measure the benches, trays and aisle you want inside, not just the outside footprint.
• Base and drainage: Follow the supplier's instructions for a level, stable site that drains well.
• Setup: Compare a delivered building against a kit plus freight, assembly help, tools and accessories.
• Winter exposure: Ask for the exact model's snow, wind and anchoring information. A structural rating doesn't mean plants can grow without heat in winter.
• Local rules: Confirm City of Winnipeg permit, setback and zoning requirements before placing the order.

For a broader look at backyard buildings, see our Winnipeg shed options guide. Our Canadian shed-buying checklist covers site access, foundation preparation and quote details. If the greenhouse is part of a bigger garden project, our Winnipeg landscaping guide can help you plan the surrounding yard.

Bottom Line: Start With Horizon for a Shed-Style Growing Space

Horizon Storage Sheds is our #1 greenhouse shed choice for Winnipeg when the priority is a seasonal potting space with a floor, shelving and a local delivery conversation. The alternatives offer useful cedar, steel and polycarbonate designs, but most put more assembly, freight or accessory planning on your to-do list.

Ask Horizon for the size that suits your yard and your planting plans, then compare the complete project cost. You'll get a much clearer answer than you would by comparing greenhouse photos or starting prices alone.

Product details checked against the suppliers' websites on October 8, 2026. This is an editorial comparison of specifications and buying arrangements, not a firsthand product test. Confirm current availability, pricing, delivery and suitability for your site. The hero image is an illustration, not a photo of a specific supplier's greenhouse.