Greenhouse Tomatoes

The Benchmark: Growing Tomatoes in Greenhouses

Tomatoes are a crop that thrives in warm, well-ventilated environments. They require a good balance of light and dark periods for optimal growth. Tomato plants benefit from a consistent light schedule with at least 6 to 8 hours of sunlight, while the dark period aids in their respiration process, promoting healthy growth and fruit development.

Things to Consider for Cultivating Tomatoes in Greenhouses

10 Frequently Asked Questions

Day temperature inside the greenhouse 28 C
Night temperature inside the greenhouse 18 C
Average daily temperature 22 C
Temperature differentiation 2 kelvin per hour 2 C
Relative humidiy levels 70 - 75 %
Carbon dioxide (CO2) levels 800 ppm
Truss length 8.0 m 8,0 m
Section, varying between 4.5 and 5.0 m 4,5 or 5,0 m
Post height 6,0 m
Foundation height 0,3 m
Roof glass Tempered, haze with AR  
Steel frame Galvanized  
General installation load 70 N/m2 70 N/m2
Crop load  200 N/m2
Crop systems  150 N/m2
Top Layer Shade / Diffuse Screens
Bottom Layer Energy Screens

Clean water, with added minerals
Clean water from a well or rain water, treated with Reversed Osmosis if needed

2.0 liter per square meter of dosing per hour is sufficient 2,0 L/hour
Recycling at approx. 30% of the water 30 %
Re-using the water treating with ultra-filtration    
Hanging gutter suspended from the gutter
Average 185 umol
Extreme 225 umol

Number of hours of operation, varies per region and planting date.

The yields of in a tomato greenhouse greatly vary between the cultivars.
Depending on the costs of labor, the bottom line figure is similar.
Minimal (Cherry) 28 kg / sqm
Maximum (Beef tomatoes) 90 kg / sqm
Note, depending on cost of labor the bottom line figure might be very similar    
Number of persons per hectare 10 persons
Management per facility 2 persons
Supporting staff per facility 2 persons
Typical minimal operation size 40.000 sqm
Optimal manageable operation size  80.000 sqm

Estimated return on investment of a tomatoe project?