Greenhouse plants usually favor the comfortable temperature range of 60 to 80 degrees Fahrenheit for the ideal growth, based on the species. Directly related to the temperature is that the indoor humidity. Plants exposed to excess humidity levels have a tendency to suffer with leaf disorders and stunting; they cannot transpire moisture easily through their stomata. Moisture control based on greenhouse temperatures requires monitoring of both heat and ventilation.
Temperature and Humidity
In general, higher greenhouse temperatures hold more water in the surrounding air mass. For example, if you maintain an indoor temperature of 68 degrees Fahrenheit, your relative humidity is put as high as 91 percent. By upping your temperature, your humidity rises as well. Consequently, you control moisture with a greater temperature; water cannot condense out of the atmosphere to damage foliage without a drop in temperature.
Venting
Keeping your greenhouse in an even temperature is a struggle for any gardener; daytime and nighttime temperature fluctuations vary widely among areas. Avoid hot or cold spots in the waterfront environment by employing wall air ports and horizontal fans to keep the air properly mixed. For example, venting air from the exterior brings in new carbon dioxide. Horizontal fans prevent unexpected falls in greenhouse temperatures so the dew point cannot be met; condensation looks on foliage once the dew point is accomplished.
Greenhouse Heating
An excellent greenhouse heating system typically comes with a timer and set temperature range. For a successful plant collection, you must put the heater into the optimum range for your individual species alternative; the heater cycles on and off based on the surrounding atmosphere temperatures. By selecting a greater temperature range for the plant species, then you control the moisture in the atmosphere. In general, the greenhouse inside should be hotter than the exterior atmosphere for the best moisture control.
Warming the Plants
The plant surfaces themselves usually have a lower temperature than the surrounding air mass. This temperature gap presents a moisture control problem; the thin atmosphere layer surrounding the plant, such as a huge fruit, which may condense moisture onto the foliage since the fruit has a lower surface temperature. As a solution, gardeners utilize glowing heat beneath the camel holding the plants. Gentle and constant heat in the radiant heat allows the plant surfaces to heat to the same temperature as the surrounding air mass. Moisture control is much more secure with air and plant temperatures equaling one another.