How important is Humidity & Temperature?
It is extremely important to monitor & control relative humidity around a hydroponic crop. Relative humidity should be in the range of 50-70% and temperature should be around 30-33degrees Celsius during the day and 18-20degrees at night. Extremes in temperature should be avoided. Temperatures above 35 degrees stop plant development. High humidity increases the risk of moulds and mildew developing as well as encouraging an irresistible habitat for pests like spider mite & scaridfly. High humidity also reduces transpiration, which in turn reduces circulation in the plant of essential elements like calcium. Low humidity, or dry air, can decrease the likelihood of fungal diseases but it also increases transpiration in the plants which can in turn dry the leaves and growing points out excessively. This can produce lack of pollination in tomato crops because the growing point dies. This of course affects the overall harvest of the crop. Increased transpiration in the leaves also affects the
