LED Grow Lights and the History of Hydroponics

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LED Grow Lights and the History of Hydroponics
Hydroponics has an interesting history. Perhaps
the first instance could be traced back to the
times of the Romans or even before that when man
learnt that plants can be grown with water and
some nutrients, without the need for soil.
However, hydroponics as it is practiced today
perhaps owes its origins to Jean Van Helmont,
who, in the 17th century experimented to show
that plants draw nutrients from water.
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After that it was left to Julium von Sachs and
W.Knop of Germany to find out that plants use
Nitrogen, Potassium and Phosphorus as nutrients.
In the early part of the 20th century, Dennis
Hoagland developed a nutrient solution the
formula of which is still in use. In addition to
the three basic nutrients, he also included
minute amounts of other metal salts. Then, in
WW2, the Americans used hydroponics to grow
vegetables on the rocky and barren islands of Iwo
Jima and Okinawa.
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Then in 1960s came along nutrient film technique
and drip irrigation system that gave a fillip to
hydroponics. Growers used mineral wool and these
two techniques to deliver nutrients to plants. A
decade later growers of cannabis discovered
this as being perfectly suited to their
requirements. Around this time General
Hydroponics arrived on the scene with its ready
to use mix of liquid nutrients.
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Light is crucial for indoor hydroponics, a
practice much preferred by cannabis and marijuana
growers. High intensity discharge lamps arrived
on the scene and gave a further fillip to
hydroponics as did halogen and sodium vapor
lamps. However, these were incremental progresses
in lighting technology. LED lights used for
hydroponics (or any other purpose) last for
100000 hours and have none of the drawbacks.
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