Hydroponic cultivation
Hydroponic cultivation generally occurs indoors, although there is no practical obstacle to growing outdoors. In general, it consists of a non-soil medium which is exposed to a nutrient and water flow.
There are many types of hydroponic systems. If the nutrient solution floods the loose growing medium and recedes for aeration, this is an ebb and flow or flood and drain system. Systems that gradually drip solution onto the medium are drip systems. Systems that intermittently spray roots floating in air are called aeroponic systems. If aerated water runs down a channel lined with a film of rooting medium, this is a nutrient film technique system. A series of tubes intermittently running high flow nutrient solution into the tops of growing containers use a top feed system.
Hydroponic systems greatly increase aeration of plant roots, and increase control of nutrient uptake. Hydroponic systems are decidedly more difficult to operate for the amateur or hobby grower, as over-fertilization is common, because there is no soil to act as a nutrient buffer. For this reason, many growers now use coconut fibre as a soilless medium due to its high drainage and buffering capabilities, making it almost impossible to over-fertilize. Additionally, if a hydroponic system fails, the crop has a high probability of dying as the roots rapidly dry out (this is especially true of aeroponic systems).
There is now a new bread of hydroponic configurations such as the Omega Garden and the Ecosystem that use circular designs to maximize efficiency. This consists of plants being placed or in the case of the Omega Garden revolving around a central light which maximizes the lumen output of the lights used.
[edit]Organic cultivation
Organic cultivation of marijuana is similar to the organic food movement in recent times. It is superficially similar to the hydroponic methods, with the exception of tending towards soil and nutrients which are derived from organic sources. In general, these sources are items like guano. The use of soil (generally in buckets or heavy duty plastic bags) makes for a more natural cultivation process. However, the composition of the "organic" nutrients is monitored by the manufacturers, and is usually printed on the container. For this reason, the supposed organic cultivation of cannabis, especially indoors, resembles other controlled cultivation methods where the intake of the plants is closely monitored.
[edit]Sea of green
In contrast to the "Screen of Green" methodology, Sea of Green (or SOG) growing depends on the high density of plants (as high as 60 per square meter) to create uniformity in the crop. In this technique, which is often grown in hydroponic media, only the colas of the plants are harvested. Containers are used to enforce the geometric distribution of flowers and plant material, as well as their exposure to lighting and atmosphere. Sea of green is popular with commercial cultivators, as it minimizes the amount of time a plant spends in vegetative stage, and allows very efficient light distribution, keeping the plants much closer to the lights than when grown to full size. However, the individual plants grown with this method typically give smaller yields than those grown with other methods.[citation needed]
[edit]Sinsemilla
Sinsemilla (literally, "without seeds" in Spanish) refers to removing male plants from the grow environment before they have a chance to fertilize the females. The resultant cannabis contains more psychoactive compounds known as Cannabinoids. The amount of Cannabinoids in sinsemilla is considerably more in comparison to cannabis that has been grown in a pollinated environment, because the production of seeds requires an immense amount of energy, and if left unpollenated a female plant will divert all her energy to calyxproduction in an effort to catch pollen. This is especially desirable, as the calyx is where the highest concentration of trichomes exists, and the more densely packed a plant is with calyces, the greater psychoactive effect that plant will likely have.
Thus, sinsemilla is more expensive to purchase than cannabis with seeds, as the purchaser is actually receiving more psychoactive substance. Potent sinsemilla is especially important to medical users, to minimize the amount of cannabis they must consume in order to be afforded relief. Cannabis with seeds is generally considered to be of inferior quality and/or grown with inferior technique. Common terms for seeded, or otherwise low-quality, cannabis are schwag or mersh.
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