Types of Commercial Greenhouse Crops
Commercial greenhouse production is one of the most efficient methods for consistently growing fruits, vegetables, flowers, or seedlings. Our professional greenhouses boost productivity, improve harvest quality, and increase yields. Each crop has specific requirements for climate, irrigation, and light. Because every plant deserves the best conditions to thrive, our greenhouses are specifically designed to sustainably and efficiently meet the needs of each type of crop. We create environments that allow your crops to flourish season after season.
Types of Commercial Greenhouse Crops
At Harnois, our commercial greenhouses are designed to support a wide variety of crops, from high-value vegetables to ornamental flowers and tree seedlings. Whether you grow for direct sale, wholesale, or propagation, our commercial greenhouse structures can be tailored to meet your specific production needs.
Fruits & vegetables
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:
- Soft fruits like strawberries, raspberries and blueberries
- 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.
Flowers & ornamentals
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.
Nurseries & seedlings
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.
Institutional & community crops
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..
Benefits of Growing in Greenhouses
Harnois Greenhouses offers growers a range of structural, technical, and economic benefits that improve both productivity and resilience.
Predictable yields
A commercial greenhouse provides a stable and controlled environment for growing plants. By managing key variables such as temperature, humidity, light intensity, and CO₂ levels, growers can reduce crop stress and minimize variability in their crops. This results in more uniform plants, consistent harvest cycles, and higher overall yields, all of which are critical for meeting market demand and planning resources effectively.
Extended growing season
Commercial Greenhouses allow producers to start crops earlier in the spring and extend the harvest later into the fall. With proper heating and ventilation, many crops, such as lettuce, cucumbers, or strawberries, can be grown year-round. This provides more marketing opportunities and supports the local food supply during off-seasons..
Reduced environmental footprint
Commercial greenhouses optimize the use of inputs. With tools like drip irrigation, fertigation, and climate control, growers can use less water, fewer fertilizers, and fewer pesticides per unit of production. This makes greenhouse farming more efficient and aligned with sustainability goals.
Improved crop quality
Stable growing conditions contribute to improved colour, flavour, texture, and shelf life. Greenhouses reduce the risk of defects caused by temperature fluctuations or excess moisture, which improves the value and competitiveness of your produce.
More reliable planning & profitability
Commercial greenhouse production enables growers to anticipate revenues and effectively manage operational costs more accurately. By reducing exposure to external risks and allowing tighter control over production parameters, it becomes easier to secure contracts, fulfill orders, and scale operations sustainably.
Efficient use of labor & infrastructure
A predictable, controlled environment allows for better scheduling of planting, harvesting, and maintenance activities. It also facilitates automation and integration of monitoring technologies, which help reduce labor costs and improve traceability.
Protection against weather extremes
Extreme weather events, such as hail, heavy rain, frost, or heatwaves — are becoming more frequent. A greenhouse acts as a physical barrier, ensuring stable production conditions regardless of outdoor variability. This improves resilience and reduces the risk of total crop loss.
Why Choose Harnois Greenhouses for your crops
We design and manufacture commercial greenhouse structures adapted to a wide range of agricultural realities. Our greenhouse solutions are based on decades of field experience and continuous research & development.
Structures adapted to your production
Whether you grow fruits, vegetables, flowers, or tree seedlings, we offer commercial greenhouse models suited to your climate, production goals, and scale of operation. Our range includes high tunnels, freestanding greenhouses, gutter-connected structures, and a glass greenhouse.
Modular and scalable design
Our greenhouse structures are designed to evolve with your needs. You can start with a single unit and expand over time. Integration of ventilation, heating, shading, or automation systems is possible at every stage.
Technical support and expertise
Our team includes engineers, agronomists, and greenhouse specialists. From planning to installation, we provide guidance tailored to your project and location.
Trusted by growers
Harnois Greenhouses has delivered thousands of greenhouses in North America and beyond. Our clients include commercial producers, research institutions, and community-based operations.