Commercial Greenhouses, Structures and Equipment: Designed for predictability
Looking for a top-tier greenhouse in Canada or USA? Harnois Greenhouse designs and manufactures high-performance commercial greenhouse engineered for Canadian & Northern USA climates. Trusted by growers across both countries, our greenhouse structures are built for durability, energy efficiency, and scalable growth—making us a leading choice for greenhouse Canada solutions.
Commercial greenhouse structures come in a variety of designs and structures to meet the diverse needs of growers. From glass and polycarbonate greenhouse structures to high tunnels and gutter-connected models, Harnois Greenhouses provide optimal growing environments for a wide range of crops. Advanced climate control, irrigation systems, and energy-efficient materials enhance productivity while ensuring consistent yields. Whether for vegetable, flower, or hydroponic production, commercial greenhouse structures offer customizable solutions to maximize efficiency and profitability.
Commercial Greenhouses
What’s your goal?
New greenhouse project
Design and build a custom Harnois greenhouse from the ground up; engineered for your crops, climate, and long-term growth.
Expansion of an existing structure
Seamlessly connect new bays or modules to your current greenhouse to increase space and production capacity.
Increase production capacity
Maximize yield potential through improved layout design, crop zoning, and structural scalability.
Harnois
Greenhouses
Optimization / retrofit
Upgrade your existing greenhouse with modern materials, automation systems, and energy-saving enhancements.
Improve efficiency
Enhance temperature, light, and ventilation management with advanced Harnois climate solutions tailored to your needs.
Repairs or maintenance
Restore the performance and safety of your structure with expert inspections, part replacements, and certified repairs.
Why Harnois Is a Leading Commercial Greenhouse Structures Manufacturer in North America
With over 60 years of expertise, Harnois is recognized as one of the top greenhouse manufacturers in Canada. Our commercial greenhouse structures are designed for Canadian growers who need structures that can withstand extreme weather, optimize crop yield, and integrate seamlessly with automation technology.
Discover how growers across Canada are using Harnois greenhouses—from Quebec to Ontario to British Columbia—to increase production and extend their growing season.
FAQ on Commercial Greenhouse Structures
What Are Commercial/Industrial Greenhouses?
Commercial greenhouses structures are large-scale growing structures designed to create optimal environmental conditions for crop production, regardless of external weather. Engineered to maximize space, light diffusion, and energy efficiency, these structures support a wide range of crops and agricultural practices—from year-round vegetable production to specialty flowers and organic farming. Unlike hobby or backyard greenhouses, commercial greenhouses are built for durability, scale, and profitability.
Potential Uses of Commercial Greenhouses
Commercial greenhouses serve multiple industries and growing objectives, including:
Horticulture and Floriculture: Ideal for growing flowers, ornamental plants, and nursery products.
Vegetable and Fruit Production: Allows for controlled cultivation of tomatoes, cucumbers, peppers, strawberries, and leafy greens.
Organic Farming: Offers a protected environment to meet organic certification standards.
Research and Education: Used in academic institutions for controlled experiments and teaching.
Pharmaceutical and Cannabis Production: Enables precise climate control for high-value crops requiring strict regulation.
These greenhouses can be tailored to fit both high-tech and low-tech growing models, with options for automation, climate zones, and renewable energy integration.
Components Used & Their Benefits
At Harnois, we use only high-quality components that ensure performance, longevity, and ease of maintenance:
Galvanized Steel Frames: Engineered for snow and wind loads in North American climates, with optional hot-dip galvanizing for maximum corrosion resistance.
High Light Transmission Coverings: Choose from multiwall polycarbonate or high-performance polyethylene film to enhance photosynthesis while reducing heat loss.
Ventilation Systems: Natural ridge vents, sidewall roll-ups, and mechanical fans maintain airflow and reduce humidity.
Shading and Climate Curtains: Optimize light levels and temperature to reduce energy costs and boost crop yield.
Irrigation & Fertigation Systems: Integrated solutions for precise water and nutrient delivery.
These components are customizable based on your crops, climate, and automation needs.
Benefits of Commercial Greenhouses
Choosing a Harnois commercial greenhouse brings a host of operational and financial advantages:
Year-Round Production: Extend the growing season or produce crops continuously, regardless of outdoor conditions.
Increased Yields: Controlled environments lead to healthier plants and higher productivity per square meter.
Reduced Input Costs: Optimized irrigation, energy use, and climate control lower water, fertilizer, and heating expenses.
Improved Biosecurity: Protect crops from pests, diseases, and contamination.
Faster ROI: Reliable structures and efficient systems help you reach profitability sooner.
Our greenhouses are designed to evolve with your business, offering expansion-ready structures and scalable technologies.
Commercial Greenhouse Structures by Harnois
Harnois offers a complete range of engineered commercial greenhouse models tailored to your needs:
Vermax Glass Greenhouses: A premium solution for high-efficiency production and advanced climate control, ideal for producers aiming for Nearly Zero Energy Buildings (NZEB).
Ovaltech High Tunnel Greenhouses: Durable, economical, and modular—perfect for soft fruit production, seasonal crops, or organic farming.
Custom Engineered Greenhouses: Designed in-house to meet local codes, site-specific climate conditions, and crop requirements.
All our structures are manufactured and sourced in Canada, built with decades of experience in agricultural innovation. Our team of engineers and agronomists supports you from project design to post-installation optimization.
Where can I find a high-quality commercial greenhouse in Canada?
You can find high-quality commercial greenhouses directly from Harnois Greenhouses, a Canadian manufacturer recognized for its durable, efficient, and customizable structures. Designed and built in Canada, our greenhouses are engineered to perform in harsh northern climates, with features like oval-tube arches, optimized light transmission, and energy-efficient coverings.
Whether you operate a vegetable farm, nursery, or research facility, Harnois offers tailored greenhouse solutions that ensure long-term profitability and reliability.
Does Harnois offer commercial greenhouse solutions in the USA?
Yes. Harnois Greenhouses proudly serves growers across the United States with high-performance commercial greenhouse structures. Our solutions are designed to adapt to diverse U.S. climates — from northern regions with heavy snow loads to southern states with intense heat and humidity.
All Harnois structures are engineered for strength, light optimization, and durability, using our exclusive oval-tube arches that reduce steel usage while maximizing performance.
Our team provides full support, from design and customization to shipping and technical assistance throughout North America.
Can Harnois commercial greenhouses be exported internationally?
Yes. Harnois Greenhouses exports its commercial greenhouse structures worldwide. Our modular and durable designs make international shipping simple and cost-effective. Each structure is carefully engineered for easy transport, quick assembly, and long-term performance, even in challenging climates.
With decades of experience in global projects, Harnois supports customers with customized designs, documentation, and technical assistance to ensure smooth delivery and installation anywhere in the world.