Cannabis cultivation is the cultivation of the cannabis plant. Mintage of cannabis include C. Sativa, C. Indica, & C. Ruderalis. Cannabis is primarily grown for ii purposes: a production of hemp for materials such as clothing and oil (for cosmetics, fuel, when well as numbers of more products), or even for the production of the recreational drug, marijuana. A medical use of cannabis is well-documented but its have remains restricted within virtually all countries.

A legal status of marijuana has led growers to novel cultivation methods like hydroponics, aeroponics (itself a form of tank farming), likewise when organic cultivation methods. Locate into a production of cannabis for the drug marinol has further pushed a envelope of cannabis cultivation. This emphasis in advanced cultivation techniques -- two from either non-commercial & commercial growers -- is believed to become a factor out the increase in the overall quality of cannabis across the survive couple decades. A below covers a plant's entire incubation, from either germination to harvest.

Botany

Cannabis is an annual plant, which naturally is vegetive in the spring & summertime, preferring to fruit in the fall, or even late fall. Plants come male or even female, & come known for their production of oils, fibers, & a chemical Tetrahydrocannabinol, or THC.

Cultivatiin of the plant occasionally focuses on production of one of its above-noted ingredients. These are imaginable to develop a plants inside a super close matrix, whereupon the ensuant plants have had super ticket fibers, which may be utilized to produce silk. As an alternative, plants which are then grown under close nutritive superintendence by having enhanced carbon dioxide environments & lighting might develop comparatively higher quantities of THC.

When these are imaginable to develop cannabis only for the purpose of the houseplant or as the hobby, a practice is quite challenging due to the require to keep the plant around a close perpetual vegetive state.

Germination

Germination can be accomplished in the kind of ways. Whenever growing open air, only plant a seeds inside unfertile soil. Whenever growing inside nonetheless, 1 could plant seeds inside the aquacultural vermiculite solution. 1st-period cultivator typically utilise a good deal simpler method of growing around soil when opposed to hydroponically, for instance moving onto tank farming fallowing becoming supplementary wiz at cultivation. Rockwool cubes also act super easily, & increasingly big cubes can be utilized post-germination when a plant continues to develop.

That you might germinate seeds around the paper towel. Place the paper towel by using seeds around a bowl, saturated by having decrepit nourishing guide, & handle by having disposables diaper to keep it from either drying. Put the bowl around the warmly front yard; in top of a radiator even, a water supply heater closet, or above warmly lamps. within case storing a bowl in an region studied to weak, handle it using melanise paper to shut weak. Prevent a bowl when each Twelve hours, when soon when we underst& any midget develop-tips sprouting from either a seeds, have pair of pincers and plant a seeds, planting a develop-tip higher whenever conceivable. This method is quite tricky, when these are conceivable a paper towel might dry out as well convenient, probably killing a seeds.

Vegetative Growth

When sprouted, a plant starts vegetative growth. This means a plant is photosynthesizing as much as possible to develop tall. It may besides begin numbers of develop tips at both pair of leaves. The develop tip is the a portion that may be cloned or even propagated asexually (understand late within article). It is placed at a top of the plant, & each major internode. If you prune a plant, it so has 2 develop tips at a top. If smart shoppers prune every one, you have had Iv develop tips at a top of the plant, then in. Since it will require period for even the plant to feel better & recover from either the trauma of existence pruned it takes a few skill to acheive a balance sustaining pruning, overmuch or as well little may disadvantage plant incubation somewhat.

100% plants have a vegetive stage in which it is growing when convenient when imaginable when a plant 1st germinates from either seed. In case growing inside, 1 might only leave growlights in Xxiv hours the day, plainly requiring there is no timer. Plants may be grown vegetive indefinitely. These are as much as a agriculturalist to decide whilst to inflict a plant to flower. The cannabis plant might develop from either Xii inches to Eighter from decatur foot prior to existence forced to flower, so there is a wide timeframe using which to initiate flowering. Virtually all agriculturalist nonetheless, select to initiate a flowering stage 4 to six weeks fallowing germination.

These are vital that the single bend a immature plant's stem back & forth to inflict it to become super heavy & hard. Lank stems might prove the hindrance late, when it can't trend lines heavily flowering incubation. An internal oscillatory fan may reduce humidness on the leave's stomata & improve a stem strength as well. A importance of internal air circulation potty non become stressed plenty, typically, effective air circulation. It may exercise a plants & produce the two develop stronger, when reducing several hazards that may ruin your systems crop.

Vegetating plants necessitate very much feeding to fuel their incubation. These are vital from either each one plant receives trace mineral fertilizer, which is widely available from virtually all garden centres. Trace minerals come vital for cannabis plants when you took a vegetive stage. Epsom salts come besides utile, when it contain magnesium and sulphur minerals. For each gallon of water, put Single teaspoon of trace mineral fertiliser & 1/2 teaspoon of Epsom salts. Optionally, Ace teaspoon of oxygen-rich fertilizer can as well become added.

Flowering/Fruiting

A plant is caused to flowering by decreasing light from either 18-2 dozen hours a day to to dark oscillations of 11-13 hours that simulate a oncoming wintertime in the fall when the times develop shorter. Following, it works out swell inside to own 2 separate areas; 1 that is utilized for the initial vegetive state & of these that is utilized for flowering & fruiting. These are required to keep a dark period for even flowering super dark by having there is no lightly interruptions, when any weak may stall flowering by times or weeks. Flowering usually lives from either Three to Five weeks inside, whenever growing open air it can require somewhat hanker, based on the natural onset of the colder seasons.

Another time the plant is large plenty to mature, dark periods come mandatory for virtually all plants to flower & bear fruit. This takes putting the lamp in a timer, to produce regular & nonindulgent dark periods of continuous weak. around case growing in the greenhouse, the equivalent consequence may be created in the Summer (long times) by covering it by using the blanket to produce yearn nighttime periods. For instance, a nonindulgent schedule of covering the plants at 8pm & uncovering the babies at 8am for Ii weeks may begin the plants to flowering. Fallowing the number 1 Two weeks, a schedule may become relaxed a little, however it may however be necessary to prove my point this routine for the plants to all flower forswearing reverting back to vegetive incubation.

Open, inside spring and autumn, the nights come sufficiently yearn to cause flowering the least bit days. Whenever imaginable, simply bringing a plants from either inside to the outside at these days may permit natural flowering.

Flowering plants should lean high phosphorus plant food and by owning little or even there are no weak in the dark period. Long dozen hours weak, Xi dark for example could increase flower size when however leaving a plant to last into a flowering mode. Have hanker dark periods to speed maturity toward a prevent of the flowering period in case instance is parcel. Doing this might still reduce number yield.

Both shelves may be utilized, a single monovular to the more, in case strictly indoor horticulture is desired. 1 shelf's lights come placed for 12-13 hours, & 1 is lit day and night. Plants come began inside continuous weak, & come moved to the more shelf to flower to maturity when many weeks. This flowering shelf should exist as large than a "starting" or even "vegetative" shelf, and so that it potty accommodate big plants. Or even, a select few plants may be taken outside whenever there exists non plenty space on the flowering shelf for completely of the children touching harvesting.

Two or three weeks when turning back a lights, numbers of whiten pistils might start out emerging at each develop tip on the plant. Which are actually a flowers, another period smart shoppers sense satisfied by having a total of sprouted flowers, decrease a lighting schedule over again to about 8-10 hours, simulating late fall, a time while a cannabis plant reaches maturity & is wholly quick for harvest.

Harvest

Plants come harvested once a flowers come fully ripe. Typically, ripeness is defined while when a whiten pistils begin to turn 'last, orange, etc. & begin to withdraw back into a traitorously seed pod. A seed pods great sustaining rosin normally reticent for seed production, so improving a quality of the buds (known as colitas). These are interesting that a instance of harvest controls a "high" of the buds. In case harvested early using simply two or three of the pistils off color, the buds have had a additional pure THC content & less of the cannabinoids CBD and CBN. A lesser consciousness-altering drug might produce a bouquet of a marijuana, & control the overall nature and severity of of the high.

After harvesting, refrain from bouncing on a flowers, when a trichomes come fragile, & could break polish off. Totally cut the stalk of the plant, hang it upside-inverted within the cool, dark place like a shed or even an attic.

Drying

A plants should become dried slowly complete Two weeks or even sir thomas more at about room temperature (Xxiv celsius). Flowers come hung by their stalks, allowing for a internal water of the plant to remain in the flowers. Whilst a stems midmost of a big buds may exist as snapped well, the plant is dry plenty to be cured. Drying out should exist when neutralise the dark place, as trichomes may deteriorate whenever involved to weak.

Post-harvest

Curing

A curing process continues in breaking down sugars & assists produce taste & a smoother smoke, usually, the dried product is packed (not compressed) into glass caning jars which are airtight, initially the product must be checked periodically (every few hours) to make sure the herb was properly dry & has not remoistened itself, if it has it needs to be removed & further dried, after a couple of days when you are satisfied the product is dry, you can seal off the jars and just open them once a week. Curing is extremely varied, a minimum is commonly Ii weeks, a bit of agriculturalist potentially remedy when hanker Hexad months patch others don't remedy in the least. Easily-cured cannabis is, generally, the higher quality product & extra pleasent to smoke. For the equivalent reasons when drying out, curing jars should exist as stored inside the cool, dark, place.

Hash Oil

Cannabinoids come soluble inside a few chemical substance, notably butane. These are imaginable to choose a leaves & stems of the plant, which are then usually considered to become of moo THC concentration, and immerse the children within liquid butane. the butane is so captured across a purification, & evaporated (butane becomes a flatulence at room temperature, then of these might only allow it to evaporate). A consequent hash oil is often super heavy inside terms of THC content, which may be so smoked or even added to nutrients. Note that 1 should non smoke or even otherwise produce fire when in contact with evaporated butane, which is extremely combustible.

Hashish

Hasheesh may be by many methods. the method virtually all listed in a west is to choose the plants or even flowers & beat the two against a screen. This stimulates a trichomes to break off a plants, & exist as collected under the screen, which serves as a unprocessed purification.

Detection and the law

When cannabis & its cultivation is illegal within virtually all area of the globe, considerable resources come committed to the interdiction of cultivation.

Outdoors

Outdoor cultivation is very green around two rural and urban areas, with numbers of outdoor cultivators tending towards growing further sativa-based tries for better response to sunlight and less odour emission.

Cannabis plants tend to blend inside using more plants pertinent that it is unidentifiable by a lot however a virtually all observant. Typically elementary camoflage techniques can avert detection, like mixing within cannabis plants sustaining more bushy, leafy coinage. Plants began outside late in the year tend to develop less tall, so attracting tremendously less attention whilst laid next to plants of similar or even taller stature. Potentially tall plants grown among many trees may be just about invisible in their camouflage.

The super most common system utilized by several outdoor agriculturalist is to burrow the hole & put the potted plant inside it. This reduces the plant's height by at least the foot, thereby making it tremendously less visable to in the adjacent house neighbours, visitant & guests. Likewise, a bit of agriculturist top a plant once these are lone Xii" high, and grow the 2 tops horizontally along a trellis. Using this technique, it is highly unlikely the plant will ever be over 3 feet tall.

Law enforcement often monitors certain wider areas, in particular the countryside with a past history of marijuana growing, determining abnormal power draws. This is also done in conjunction with civilian agencies, such as local power companies. The use of infrared cameras is also common.

To detect plants outside, complex methods to measure the heat and reflective signature of cannabis are employed. This is quite effective, and difficult to defeat, as the reflective mask of a given plant is very difficult to change.

Indoors

Indoor growing has become increasingly common over the past decade, in part due to increased availability of equipment, seeds and instructions on how to cultivate. So-called Grow-ops are seen by many marijuana enthusiasts as a much cheaper way in which to gain a steady, higher-quality supply of cannabis, also, on a larger scale they have proven a viable commercial venture with some law enforcement agencies finding grow-ops large enough to yield several kilograms of marijuana. More expansive grow-ops, however, are generally more susceptible to detection than smaller scale operations.

Since individual grow light wattage generally ranges from 250 watts to in excess of 1000 watts, and remain lit for a long time each day, differences in utility bill costs are a significant security issue for growers. Indeed, it is not uncommon for power companies to work with law enforcement if they witness significant increases in power usage relative to a household's previous electricity costs. Employing energy saving methods is a common way to alleviate this, for instance; switching off light bulbs when leaving rooms, purchasing energy efficient appliances, using TV's or computers less, buying lower wattage light bulbs and so forth.

Some strains, especially indicas, can give off strong odors as they grow. Often, it is these odours that result in tip-offs and eventually detection. Growers frequently use strong air fresheners to control smells, as well as keeping windows firmly shut, and checking outside to see if any smells are emanating from indoors. Indeed, storing plants in more isolated areas such as a basement or attic can also help prevent smell detection. Another perhaps more obvious solution is to simply grow a strain which possesses a weaker odor.

Storing plants and lights away from windows and areas which may be seen by visitors is also a common practice. Again, keeping plants in the attic or basement can solve this problem. Some growers, finding this impractical, may cover their windows with light-resistant materials. This can solve the problem of escaping bright light but may still arouse suspicion among neighbours and local residents.

Of course, word of mouth can be as much a threat to growers as any of the above issues. Often, a few sentences of conversation overheard can result in a tip-off and thus speedy detection. It is for this reason many growers keep as quiet as possible about their cultivation.

Cultivation Techniques

Hydroponic Cultivation

Increasingly popular, especially in the developed world, is the hydroponic cultivation of cannabis. 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.

The main advantages of hydroponic systems are greatly increase aeration of plant roots, and increased real-time control of nutrient uptake. The latter fact means that hydroponic systems are decidedly more difficult to operate for the amateur or hobby grower, and overfertilization is common, as there is no soil to act as a nutrient buffer, many growers now use the hair from coconut shells as a soiless 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). However, properly operated hydroponic systems, with other factors at an optimum, have been proven to outperform soil under the same environmental circumstances.

In marijuana culture, some believe that hydroponically cultivated marijuana can have fewer byproducts in the resultant smoke and ash, providing for a cleaner and healthier smoke. Of course, the veracity of such claims is suspect, as with proper pre-harvest flushing, and post-harvest drying and curing, there would be nothing to indicate an inherent difference in harmful content between soil and soiless mediums. This itself is controversial , as many growers/botanists believe any excess nutrients are broken down into sugars during the drying and curing processes, effectively killing the plant by starving it of nutrients.

Organic Cultivation

Organic (a substance containing a carbon molecule, and that is or was a living organism), may be a misnomer when applied to cultivation of cannabis, though it is similar to the organic food movement in recent times. The methodology 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 things 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 strictly 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.

Outdoor Cultivation

When cultivated outdoors, the chosen areas are those which receive twelve hours or more of sunlight in a given day. Northern locations are preferred (Humboldt County, California being particularly notable), but southern locations (such as Maui, Hawaii) are also known to be good producers.

In general, a south facing exposure is preferred for maximum sunlight exposure. In instances where the local laws do not permit growing cannabis, cultivators may choose to grow in forests or rugged and rural areas where the local population are not likely to find the crop. Another technique is to grow cannabis in a crop that is larger and obscures the plants, such as maize. This is reported by the United States government to be common in the midwestern states.

Some government organizations have claimed that in state and national parks, people have been injured by these "rebel farmers" protecting their crops, including a well documented developing problem with Mexican cartels growing cannabis in US national parks.

Screen of Green

One of the techniques used in the cultivation of cannabis is referred to as screen of green. This technique is so called because it involves training the plants to adapt to a wire mesh (similar in technique to an arbor). In so doing, one attains a great uniformity in the crop, and all plants attain near equal exposure to lighting. Additionally, during harvesting, the extraction of marijuana from the cannabis plants is easier due to the uniform display of the flowering parts. This is a system particularly adopted by hobby growers with limited height in their grow-area to grow big plants and by commercial growers because the system uses little or no vegetation time i.e. less yield at harvest but more plants in a confined area grown more quickly meaning more frequent harvests leading to a better overall yield.

Sea of Green

A typical "Sea of Green" layout

In contrast to the "Screen of Green" methodology, Sea of Green 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 always grown in hydroponic media, only the colas of the plants are harvested. In the above image, geometric containers are visible. Such containers are used to enforce the geometric distribution of flowers and plant material, as well as their exposure to lighting and atmosphere.

Sinsemilla

A long tradition among cultivators of cannabis, sinsemilla (literally, "forswearing seeds" in Spanish) is the product of removing male plants from the grow environment. The resultant marijuana is considered to be quite strong in comparison to marijuana that has been grown in a pollinated environment. The reason for this is the plants use the resin which would otherwise be smoked as THC-containing will instead turn it into seeds and seed pods. In addition to depriving the end product of THC, the seeds themselves create a "coarse" smoke when consumed.

Thus, sinsemilla is generally more expensive to purchase than marijuana with seeds. Marijuana with seeds is considered by many to be of inferior quality and grown with inferior technique. A common term for the "seeded" form of marijuana is ditchweed, inferring that it actually grew as a weed (which is itself a colloquial term for marijuana) without attention.

To ensure that no pollen is introduced into the environment used for cultivation, it is important to sex the plants as early as possible and remove the males, pollen sacks take 1-2 weeks to mature and burst and are easily identifiable because their sex organs are displayed as small yellow or white balls growing in clusters at the branch internodes.

CO2 Enrichment

In addition to light, plants require carbon dioxide to grow successfully. Realizing this, successful growers will employ techniques for enriching the local atmosphere with carbon dioxide. This is frequently obtained with a propane burning device, which can be somewhat dangerous for crops left unattended.

A much more static and simple way to do it would be through the use of a CO2 regulator and tanks. This can result in very precise application of carbon dioxide to the atmosphere.

Other techniques include baking soda-vinegar slurries and various other chemical reactions and dry ice. The efficacy is much reduced when compared to a CO2 regulator.

Lighting

Metal Halide (MH) and High Pressure Sodium (HPS)

Lighting is crucial in any successful cannabis growing endeavor. The commonly used lights are metal halide and high pressure sodium or HPS, as it is sometimes called. There are many different light wattages available. Some growers use lights in excess of 1000w, while more commonly lights of around 400w are used.

There is much debate on the subject of which lights are better for cannabis plants. The important thing to realize is that plants need a full spectrum of light, and using just metal halide, or just sodium vapor, will not yield a broad spectrum. It is therefore much better to use one of each kind of light during vegetative growth, though with today's improved spectrum output where more blue light is produced some people use HPS throughout the whole process, but as most modern day ballasts run both MH and HPS, some growers will use MH for the vegative stages.

However, during flowering (or "fruiting"), a more "warmly" spectrum is preferred for the plant. For this reason, during flowering, it is key to use only a sodium vapor lamp. This may present problems for some users, as lighting intensity is also key during fruiting. Many sodium vapor lamps are lower in power than the corresponding metal halide lamps, and so the grower may need to procure additional sodium lamps for the fruiting process, while one (metal halide) may be sufficient for vegetative growth.

Compact fluorescent lights are a cheap alternative; a 40 watt bulb will initiate sprouting and the beginning of the vegetative state. They can be purchased for around $10.

Lighting Modifications

Cannabis, like other plants, will tend to grow faster and more massive with more light. However, because some plants are naturally more vigorous than others, some will grow taller than their sisters. At this point, the taller plants will occlude the shorter plants, and the shorter will continue to have poorer nourishment than the taller plants.

For this reason, some manufacturers have produced moving light fixtures. In this setup, a light or set of lights will be affixed to a scaffold that rotates or moves back and forth at regular intervals. This allows the shorter plants to receive more light.

Additionally, many cultivators will cover the walls of an indoor grow with either mylar or highly reflective white latex paint or black backed white reflective plastic sheeting so that all possible light is reflected back upon the plants.

Cloning and Sex Tricks

Genetics

An important factor in extreme efficiency cannabis cultivation is containing the genetics of one's crop. This is frequently done by starting with several known strains, or several strains with preferred genetics (in the case of marijuana, one might use seeds from a batch that somebody particularly enjoyed), and then breeding or growing them to find the children which performed best.

Plant characteristics which are generally selected for include: Overall yield Time to fruiting Resistance to pests Geometric traits (uniformity, compactness, flower density, etc) Color Flavor traits Resin content

After selecting the progeny which best typify the results desired, the plants can be cloned using rooting hormone before they flower or up to two weeks into flowering. Such a plant is referred to as a mother, and a plant can be carried through a cultivation operation for as long as the grower prefers to keep the plant around.

Sex Tricks

In addition to removing males from the growing environment, it is possible to use a combination of cloning and "shocking" plants to get them to procreate with their clones (a clone will retain the same sex throughout its life, so if you clone a female plant, its clone children will also be female, precluding reproduction).

It is possible to use very erratic lighting, or several days of no light at all, to shock a plant into turning into a hermaphrodite. Such plants have both male and female sex organs. After doing this, one can take the hermaphrodite and have it reproduce with one of its clone children. This will yield sometimes in excess of 90% female plants (with hermatic tendencies), if one starts with a female. This makes the cultivation of sinsemilla much easier, of course.

Hybrid Vigor

When crossing two strains of cannabis (or two of any plant), the resultant hybrid may possess what is called hybrid vigor. In general, this produces a plant which is healthier, stronger, or quicker growing than its predecessors. Sometimes, in the case of a plant which has been brought back from fruiting (see below), it may be beneficial to cross it back with another (close) relative, in the hopes that it will become invigorated.

Caution should be exercised, as one does not always attain a beneficial cross with hybridizing.

See Also
List of cannabis strains