Farmers Put Their Faith In Dutch Greenhouse Fans

The object is to keep the inside of the growing room the same as the ambient air would be at the height of growing season, around July. In nature, the relative humidity rarely goes above 80% and the temperature almost never drops below 60 degrees during the peak summer months. In seasons where there is too much humidity, or an outside influence such as volcanic activity elsewhere on the planet impacts the temperature, there have been devastating losses to farming crops.

While most gardeners utilize their growing space primarily during winter, there are some areas where that is the only way one can expect to grow fruit or vegetables. Extreme northern climates where the therma-frost never fully thaws is one area, and those growers understand the risk of mold on plants when the humidity rises too high. They know they must have old air pumped out as new air is pumped in, keep it warm, and keep the humidity below 80%.

In order to have a successful growing space, it is vital to maintain the right air mixture in order to achieve ample but not excessive humidity in a warm tropical-like environment so that mildew does not develop. Many people sneer at the price of this system, however, and will try to cut corners. Too many corners being cut can mean the cost of the room itself is money lost.

When a new gardener fails to invest in the proper set up, it can mean a total crop failure. For a larger-sized space, a simple box fan and space heater will not suffice, and the space heater may actually run the electric bill higher than a proper system. If the temperature and humidity within the room are not kept even, the mold can grow in places like the undersides of leaves or the backs of planter boxes.

The box fan idea can work if the growing room is small enough, so long as the air is allowed to circulate adequately. The room should be able to maintain a constant 70 to 75 degrees, and never be allowed to go below 60. The key is to have the fan elevated to roof level and pointing down at the plants.

For larger growing spaces, one can utilize old attic fans if they have such a thing at their disposal. Sometimes such an item can be found cheaply at a metal recycling center that also has a store. Pay attention to any older homes which are up for demolition as well, for they may have a fan and other items useful for creation of a growing space, and the owners may be willing to let them go for free.

When the room has an excellent air mixture, then not only will plants survive but they will thrive. One can increase the carbon dioxide level at the same time they heat the growing room if they utilize a propane heat source. The drawback is the possibility of getting contaminated propane, but increasing the CO2 levels can help plants go wild with new growth.

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