Summary: Industries we service
Harnois Greenhouses is a division of Industries Harnois and a Canadian manufacturer of high-performance commercial greenhouse structures. We design and install engineered greenhouses for growers and garden centres across Canada and the United States, built to deliver reliable snow-load capacity, optimal light transmission, and stable year-round climate control.
We support a wide range of agricultural and commercial sectors, including:
Fruits & vegetables
Nurseries & tree seedlings
Soft fruits
Institutional & research facilities
Garden centers
Our structures are developed to help producers operate efficiently, protect crops in demanding climates, and achieve consistent, high-quality results season after season.
Commercial greenhouses enable growers to offer produce earlier and later in the season, maintain constant yields, and consistently produce high-quality crops, especially for climate-sensitive varieties. Common fruits and vegetables grown in Harnois greenhouses include:
- Tomatoes (cluster, grape, cherry)
- Peppers (sweet, hot)
- Cucumbers, lettuce, spinach, and leafy greens
By controlling light, humidity, and temperature, growers can achieve year-round production or early-season harvests, depending on the crop and setup.
Harnois greenhouses are ideal for garden centers,retail areas, flower growers, and landscapers. Our structures provide optimal light diffusion and climate control for:
- Bedding plants (petunias, impatiens, begonias)
- Hanging baskets and potted plants (reinforced greenhouse required)
- Perennials and seasonal flowers
We support both high-volume commercial operations and local garden centers seeking to offer a better shopping experience, stable climate, and high-quality products.
If you produce seedlings, cuttings, or young plants for transplant, propagation greenhouses are essential. Harnois greenhouses offer the environmental stability and modularity required for:
- Vegetable transplants
- Tree nurseries
- Herb seedlings
- Grafted plants
Controlled root zone temperatures, optimal ventilation, and misting options are available to maximize plant health and minimize transplant shock.
Harnois commercial greenhouses and high tunnels provide the ideal controlled environment for soft-fruit producers seeking longer seasons, higher yields, and premium-quality berries. Our structures deliver optimal light diffusion, ventilation, and climate stability to support near year-round production in many climates.
Perfect for:
Strawberries (soil or substrate systems)
Raspberries and blackberries
Blueberries and specialty berries
Whether supporting high-volume berry operations or smaller farms looking to extend their season, Harnois high tunnels offer reliable protection, reduced weather-related losses, and consistently high-quality fruit.
Harnois commercial greenhouses provide garden centers with bright, welcoming, and climate-stable retail environments that enhance the shopping experience and protect plants throughout the season. Our structures offer superior light diffusion, customizable ventilation, and reliable snow-load performance, ensuring your inventory stays healthy and visually appealing, even during weather extremes.
Ideal for:
Bedding plants, annuals, and perennials
Hanging baskets and potted plants (reinforced structures available)
Seasonal displays and outdoor retail expansions
Whether you operate a large-scale garden center or a local nursery, Harnois greenhouses help you maintain a consistent climate, improve plant quality, and create an inviting retail space that encourages customer engagement and boosts sales. Our flexible designs adapt to your layout, merchandising needs, and growth plans.
Institutional and research greenhouses
Harnois also supports schools, community projects, and institutional researchers who want to integrate greenhouse production into educational, social or research environments. These institutional greenhouses are tailored for:
- High & Elementary Schools
- Public & Botanical Gardens
- Conservatories
- Public & Privates Institutions
- Research centers and universities
Whether you need a small-scale high tunnel or a more advanced glass structure with automation, our team can help design an institutional greenhouse adapted to training, experimentation, or research..
