Many large-scale horticulturists are familiar with the challenge: despite years of experience and substantial investments, consistent year-round production remains a puzzle. Traditional greenhouses are dependent on external weather conditions, which can cause yields to vary significantly from season to season.
This article delves into the key limiting factors for crop yield in commercial greenhouses. You’ll discover how greenhouse infrastructure, climate control, and greenhouse management directly impact your growing results.
The structure of your greenhouse determines how much sunlight reaches your crops and how well you can regulate the indoor climate. Greenhouse type, roof construction, and insulation value have a direct impact on light transmission and heat loss.
Traditional Venlo greenhouses often use single-pane glass, which can lead to overheating in the summer and significant heat loss in the winter. This makes it difficult to maintain a stable growing climate without incurring high energy costs.
Greenhouse covers made of polyethylene or polycarbonate offer better insulation, but each has its own drawbacks. Polyethylene film has a limited lifespan of about four years, while polycarbonate can reduce light transmission. Choosing the right infrastructure is therefore a trade-off between cost, lifespan, and performance.
A south-facing greenhouse captures more sunlight during the winter months. However, many existing greenhouse complexes do not take this factor into account, as they were built before energy efficiency became a priority.
Windbreaks on the north side can reduce heat loss, while a slight slope of 1–2% ensures proper drainage. These infrastructure choices influence your energy consumption and, ultimately, your growing costs.
Photosynthesis requires a precise balance of light, temperature, CO₂, and humidity. When any one of these factors is suboptimal, it becomes the limiting factor for growth, regardless of how favorable the other conditions are.
During the winter months, greenhouses in the Netherlands receive only a fraction of the light available in summer. This limits photosynthetic capacity and, consequently, potential yield. Supplemental lighting can partially compensate for this, but it entails significant energy costs.
With the Ultra-Clima® concept, KUBO Group has demonstrated that efficient use of available light, combined with climate control, leads to higher yields per square meter.
Plants experience stress when temperatures fall outside their optimal range. In traditional greenhouses, day-night temperature differences can exceed 15 degrees, leading to uneven growth and increased susceptibility to disease.
Soil temperature also plays a crucial role. Roots function optimally at a constant temperature between 18 and 22 degrees. Without adequate soil heating infrastructure, the root zone often remains too cold in winter for optimal nutrient uptake.
During active photosynthesis, the CO₂ concentration in a closed greenhouse can quickly drop to levels that limit growth. Traditional greenhouses lose not only heat but also the precious CO₂ that was previously supplied when ventilating.
With its CO₂-negative cultivation strategy, KUBO has developed a method that utilizes CO₂ more efficiently by employing positive pressure and air mixing. This results in a 25.4% lower CO₂ footprint per kilogram of tomatoes compared to conventional cultivation methods.
Even with the best infrastructure, greenhouse management remains the key to successful year-round cultivation. This includes both daily operational decisions and long-term strategies for crop protection and energy management.
Irregular water supply leads to stress and reduced yield. In hydroponic systems, the nutrient balance must be continuously monitored and adjusted. Without adequate monitoring, this can lead to deficiencies or toxicity that inhibit growth.
Modern greenhouse operations are therefore increasingly using sensor technology and data analysis for real-time adjustments to irrigation and fertilization.
The warm, humid greenhouse climate is ideal not only for crops but also for pests and diseases. Traditional greenhouses with open ventilation windows are vulnerable to insect infestations entering from the outside.
Semi-closed greenhouse systems such as Ultra-Clima® operate with positive pressure, effectively keeping insects out. This reduces reliance on chemical crop protection products and supports the transition to pesticide-free cultivation.
Heating is often the largest expense in greenhouse cultivation. In temperate climates, energy costs can account for up to 40% of production costs. Without efficient heat recovery and insulation, these costs rise exponentially when attempting year-round cultivation.
Innovative greenhouse systems utilize residual heat and heat recovery. KUBO’s Ultra-Clima® achieves energy savings of up to 18.5% through smart ventilation systems that recycle heat instead of venting it.
Controlled Environment Agriculture (CEA) offers the greatest potential for consistent year-round production. By actively regulating all climate factors, external weather conditions become irrelevant to cultivation.
Semi-closed greenhouses combine the advantages of traditional greenhouse horticulture with advanced climate control. They use mechanical ventilation, cooling, and dehumidification to create optimal growing conditions.
With more than 700 hectares worldwide, KUBO has proven that the Ultra-Clima® concept works in a wide range of climate zones. From the hot climate of the Middle East to the cold winters of Canada, this concept delivers consistent results.
Sensors for temperature, humidity, CO₂, and light provide continuous data streams that form the basis for automated climate control. Internet of Things (IoT) technology makes it possible to remotely monitor and adjust greenhouse systems.
KUBO integrates these technologies into Horti Software solutions that help growers make data-driven decisions. This reduces reliance on individual expert knowledge and lowers operational risk.
The Dutch horticulture sector faces the challenge of achieving fossil-free cultivation by 2040. This requires not only investments in new greenhouse infrastructure but also a fundamental shift in cultivation strategies.
With more than 80 years of experience in greenhouse construction, KUBO Group supports growers and investors in this transition. From concept to day-to-day operations, KUBO offers the knowledge and technology to enable sustainable, profitable cultivation.
By treating greenhouse infrastructure, climate control, and greenhouse management as an integrated system, the limiting factors for year-round yield can be systematically addressed. The right combination of technology and expertise makes the difference between seasonal production and consistent year-round harvests.