CO2 is one of the key ingredients of photosynthesis, meaning it is essential for plants to grow. Monitoring CO2 in a greenhouse allows optimisation of plant growth conditions, resulting in more efficient plant growth and higher crop yield. Different plants need different levels of CO2 in the air to maximise development.
Grow room and indoor greenhouse growers online agree that for optimum plant growth, you should enrich the air around the plants with carbon dioxide (CO2) during the daylight growth cycle. Photosynthesis (plant growth) requires light, nutrients, water and CO2.
If you give your plants the perfect amount of light, water, and nutrients, the limiting factor in their growth will be the amount of CO2 in the air.
While normal outdoor CO2 levels (about 400ppm) will achieve normal plant growth, doubling or tripling the CO2 levels can increase the growth rate. However, above 2,000ppm CO2 becomes toxic to plants, and above 5,000ppm CO2 becomes potentially harmful to people. Most experts agree that 1,500 ppm is the maximum CO2 level for maximum plant growth, although any CO2 level between 1,000ppm and 1,500ppm will produce greatly improved results.
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