Greenhouse Misting System
Greenhouses have become important tools in plant cultivation. They
provide much needed growing rooms for places which are not very conducive
for the development of certain plants. They allow the cultivation of
plants in places which could grow these plants normally.
There are many factors which can affect the development of plants inside
a greenhouse. The proper balance of air circulation, ventilation,
humidity, shading and heating will provide the plants with an optimum
Other factors will such as ventilation and shading, are important for
prevention of overheating in the greenhouse. However, proper misting or
the control of humidity is the main factor which maintains a comfortable
environment for the cultivation of plants. Evaporation uses up heat when
it turns water from liquid into a gas. When the venting process is done,
much needed moisture is lost from the greenhouse because it escapes into
the air. Misting is one of the ways to replace the lost moisture inside
The amount of moisture which is needed to be maintained by the greenhouse
is dependent on several factors such as the amount of shading and
ventilation that is provided, the status of the local climate and the
fluctuations in the daily weather. The rule of thumb is that for each 10
square-ft of area, there must be 1-2 gallons/hour of moisture. A misting
system will effectively distribute moisture evenly to all the parts of
the greenhouse. A good misting system can disperse water in a fine mist,
this will prevent the plants from being soaked.
Misting systems reduce temperatures by as much as twenty-five degrees F
which is about 14 degrees Celsius.
Here are some facts about misting systems
-Misting systems can be used to disperse water in an ultra fine mist or a
very coarse spray. The size of the droplets can depend on the nozzle
type, the spacing of the nozzle and the operating pressure.
-Misting systems are used for many different kinds of applications aside
from its normal greenhouse chores. They can be used from dust
suppression, controlling static electricity control and concrete curing.
-Misting systems utilize pumps which are designed for intermittent or
continuous duty. Intermittent pumps are designed to sprinkle water for
five minutes and rest for a minute in between misting.
-Misting systems now come with electronic timers which can be programmed
to mist 1-14 times a day with each misting ranging from 1 minute to 24
minutes. Other systems can be programmed to mist in shorter durations but
-Nozzles are made from brass or plastic materials. The brass nozzles can
be easily affected by minerals that abound in the water supply. The
plastic nozzles can tolerate these minerals and can actually repel lime
and other deposits.
-The amount of water which is needed to maximize the efficiency of the
misting system can be calculated by multiplying the rate of the nozzle
flow per minute by the number of nozzles in the system and the result
will then be multiplied again by the minutes that the misting system will
be in operation each day. This result will be a good estimate of how much
water is needed by the system.
-Most misting systems today offer pumps which are almost noise-free. They
will not affect the plants and especially the people near the greenhouse.
-Misting systems can be supplemented by an evaporative cooler. They work
very well in dry climates (where humidity is below 50%). The air is
cooled by around 10-20 degrees by the water which is evaporated because
they are drawn through the cooler and then into the greenhouse. Too much
humidity can be a problem and this is why people should water the plant
only when they need it.
-The use of tools which can measure humidity can also be very helpful for
There are other factors that need to be considered in greenhouse plant
cultivation. Misting is just one of them. Misting provides the plants
with much needed cooling for the plants.
There are many tools out there that are available for greenhouse plant
cultivations which can immensely increase the quality of their
greenhouses especially in terms of misting. A cultivator just needs to
find out what kind of misting system should be employed for his plants.