As you know, the shorter daylight hours of winter limit plant growth. To bring this growth to a maximum rate, it is essential to not only provide normal summertime CO2 saturation rate but to "fertilize" the air with additional CO2. Plants can use more CO2 than normal atmosphere provides. And the more they use, the faster they grow.
Our low-cost CO2 generators for plants provide the necessary CO2 to speed up plant growth during the shorter daylight hours of winter. Plant quality is also improved as you add low-cost warmth to your greenhouse. Check out these carbon dioxide generators or contact CropKing for more information.