THE GREENHOUSE ENVIRONMENT - Continued

Our plants are very sensitive to cool temperatures, so a “back-up” system, that uses a different fuel than the main system, is needed to protect them from killing temperatures. Some greenhouses use fuels other than natural gas as a primary heat source.

For example, some of our growers have moved to high efficiency, clean burning wood, or biomass, boilers because of high and fluctuating natural gas prices.

Many greenhouses store heat not used during the daytime in large water tanks. That hot water is used to heat the greenhouse during the cooler evening temperatures.

Our growers are committed to keeping British Columbia’s air quality excellent. We have a vision of responsible environmental stewardship and are proud to call the communities where we work and live home.

Watering and Feeding Systems
Our plants require the perfect amount of water and nutrients. We water and feed our plants through a drip irrigation system that puts water and nutrients right where the plants need it: at their roots.

We grow our plants in bags of porous sawdust or coconut fiber. That means nutrients and water stay in the bags and out of the ground water.

Our growers recycle their water and nutrients, pumping them back into the feeding system. Growers constantly monitor the watering and nutrient levels by computer. They adjust amounts fed to the plants based on the amount of light in the greenhouse. Many of our greenhouse growers collect rainwater and pump it into their watering systems.

Lighting
The natural light level in the southern coast of B.C. is too low for vegetable plants to grow year round. This means we’re only able to supply our communities and others with fresh, B.C. grown vegetables 10 months of the year. Some of our growers are now testing artificial lights for year round vegetable production.

Screens that keep light inside the greenhouse are available. However, some of our vegetable crops are very sensitive to the heat that builds up if those screens completely enclose the greenhouse. Vegetable crops can die from being overheated.

This is a challenge for all greenhouse production areas. Researchers are working to develop screens that “breathe,” allowing heat to escape and the plants to thrive.

For more information on the greenhouse environment, check out our virtual tour.

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