At Pacific Green Growers we continually strive to be as sustainable as possible. Doing more with less; water, fertilizer, utility usage, while still producing the highest quality plants has been a constant over the last 15 years.
Bottom heat: One of the most efficient methods of heating a greenhouse. 160-degree water heats in a single main boiler and circulates throughout the greenhouse benches directly under the plants. This keeps the heat mostly in the root zone where the plants need it, rather than trying to heat all the air in the greenhouse to bring the heat down to the plants. We currently have 20,000 square feet that can be heated this way.
Walls and roofs: Triple wall polycarbonate roofs and end walls are one of the most efficient greenhouse glazings available.
Energy curtains: Automatic moving curtains that can act as shade but mainly functioning to insulate the greenhouse during the night or very cold, clear days.
Black out curtains: Automatic curtains whose main function is for light deprivation but as they are a 2 layer curtain have excellent insulating properties to keep the cold out and the heat in. In combination with the energy curtains plus the triple wall glazing we have many layers to conserve energy use all year long.
Natural sunlight: Oregon that has several months where the sunlight is not bright enough but often on winter days we get some sun. We do use supplemental HPS lighting and we are looking at LED lights for the future.
Ebb and flood benches: These benches work through our computer fertigation controls. The benches begin watering, starting early in the morning flooding desired benches for the programmed amount of time. When the watering is complete, all the fertilizer and water drains into recycle water holding tanks and eventually back to the main watering tanks to be used again. We try to save every drop, and best of all, we are not leaching fertilizers into the ground water or our rivers.
Proactive Beneficial insects: We do not use any pesticides and rely on a rotation of beneficial insects to proactively protect against unwanted pests and to improve our soil. The insects often change with the seasons as they also have different light and feeding needs. We also work with with our beneficials and physically scout our plants daily to insure we are well protected.