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Marijuana seeds wikipedia

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Marijuana Cultivation/Producing Seeds

Producing Seeds [ edit | edit source ]

Sooner or later every grower is going to want to produce marijuana seeds. Developing a new stable strain is beyond the scope of this discussion and requires the ability to grow hundreds or even thousands of breeding plants. However, just about any grower can manage to preserve some genetics by growing f2 seeds where they have crossed a male and female of the same strain, or can produce a simple cross which would be referred to as strain1xstrain2 for instance white widow crossed with ak-47 would be referred to as a WW x AK-47. You can produce some excellent seed and excellent marijuana this way.

To Feminise or not to Feminise [ edit | edit source ]

There are numerous myths surrounding feminized seeds. Feminizing seeds are a bit more work than simply crossing two plants naturally. However it will save you a lot of time in the end. If you make fem seeds properly then there is no increased chance of hermaphrodites and all seeds will be female. This means no wasted time and effort growing males and it means that all your viable seeds produce useful plants. Since roughly half of normal seeds are male this effectively doubles the number of seeds you have.

Feminized seeds are bred to contain no male chromosomes, which will be able to produce the crop of resinous buds sought by most growers. For gardeners who require a quick and easy cultivation process, feminized seeds are the ideal choice. Some medicinal cannabis users may be deterred from growing their own supply because of the perceived difficulty of growing or of identifying the different genders and removing males early in the blooming period. Feminized seed-strains offer a simple solution to these issues, as there is no need to spend time in the first weeks of flowering checking for male plants.

Other times you will have no choice but to produce feminized seed because it will be a female plants genetics that you want to preserve and you won’t have any males. Perhaps you received these genetics via clone or didn’t keep males.

The new thing on the market for commercial Cannabis cultivation are auto-flowering feminized strains. By crossing of the cannabis ruderalis with Sativa and Indica strains many cultivators have created interesting hybrids which boast benefits from both sides of these families.

The first ‘auto-flowering cannabis seed’ which came on the market a few years ago was the Lowryder #1. This was a hybrid between a Cannabis ruderalis, a William’s Wonder and a Northern Lights #2. This strain was marketed by ‘The Joint Doctor’ and was honestly speaking not very impressive. The genetics of the ruderalis was still highly present which caused for a very low yield and little psychoactive effect. Not very attractive.

Auto-flowering cannabis and the easily distributed seed have opened a whole new market in the world of the online grow-shop, making it easy for home growers with shortage of space to grow rewarding cannabis plants in many different varieties. To grow plants indoors, a growing medium (e.g. soil or growing Potting soil, irrigation (water), fertilizer (nutrients), light and atmosphere need to be supplied to the plant.

Auto-flowers have been rising in popularity fast and there are now auto flower growers communities. These Web properties allow users to get information on how to grow these non photo-sensitive plants and what are the best practices when producing and germinating auto-flower seeds.

Selecting Suitable Parents [ edit | edit source ]

There are a number of important characteristics when selecting parents. First are you making fem seeds? If you are then both parents will be female. This makes things easier. If not then the best you can do is select a male with characteristics in common with the females you hope to achieve from the seed.

Obviously potency, yield, and psychoactive effects are critical to the selection process. But some other important traits are size, odor, taste, resistance to mold and contaminants, early finishing and consistency.

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Collecting and Storing Pollen [ edit | edit source ]

In order to collect pollen you simply put down newspaper around the base of the plant. The pollen will fall from the plant onto the newspaper. You can then put this newspaper into a plastic bag and store it in the refrigerator or freeze it. Pollen will keep for a few months in the refrigerator and can be used on the next crop. Filtering the pollen through a silkscreen, drying, and freezing can extend viability for decades. At least one reader indicates success using pollen treated in this manner and stored at -30 c for 17 years. The chance of viability does decrease with time, even in the freezer, so the more fresh the pollen the better. Wrapping the pollen in a layer of aluminum foil and then a layer of plastic should help to protect it from freezer burn. Additionally, oxygen evacuation such as with a heavy gas like nitrogen or vacuum sealing should provide additional assurance of preservation.

Pollinating a Plant [ edit | edit source ]

To pollinate a plant you can brush the pollen on a flower with a cotton swab or you can take the plastic bag, then wrap the flower inside it and shake, trapping the pollen inside for easier transportation. In this way you can selectively pollinate plants and even individual buds and branches.

Male Isolation [ edit | edit source ]

A male plant or a plant with male flowers will pollinate your entire crop rendering it seedy. You probably don’t want THAT many seeds so how can you avoid it? Moving the male to another room might work but if that other room shares an air path via ducting or air conditioning then pollen may still find its way. One technique is to construct a male isolation chamber.

A male isolation chamber is simply a transparent container such as a large plastic storage tub turned on its side (available at your local megamart). Get a good sized PC fan that can be powered with pretty much any 12v wall adapter, by splicing together the + (yellow or red on fan, usually dotted on power adapter) and the – wires (black on fan, usually dotted power adapter) just twist with the like wire on the other device and then seal up the connection with electric tape. Then take a filtrate filter and cut out squares that fit the back of the pc fan so that the fan pulls (rather than pushes) air through the filter. Tape several layers of filter to the back of the pc fan so all the air goes through the filter. Now cut a large hole in the top of the plastic container and mount the pc fan over top of it so it pulls air out the box. You can use silicon sealant, latex, whatever you’ve got that gives a good tight seal.

This can be used as is, or you can cut a small intake in the bottom to improve airflow. Pollen won’t be able to escape the intake as long as the fan is moving but you might put filter paper over the intake to protect against fan failures. You can also use grommets to seal holes and run tubing into the chamber in order to water hydroponically from a reservoir outside the chamber. Otherwise you will need to remove the whole chamber to a safe location in order to water the plant or maintain a reservoir kept inside the chamber.

Making Feminized Seed [ edit | edit source ]

To make feminized seed you must induce male flowers in a female plant. There is all sorts of information on the Internet about doing this with light stress (light interruptions during flowering) and other forms of stress. The best of the stress techniques is to simply keep the plant in the flowering stage well past ripeness and it will produce a flower (with seed).

Stress techniques will work but whatever genetic weakness caused the plants to produce a male flower under stress will be carried on to the seeds. This means the resulting seeds have a known tendency to produce hermaphrodites. Fortunately, environmental stress is not the only way to produce male flowers in a female plant.

The ideal way to produce feminized seed through hormonal alteration of the plant. By adding or inhibiting plant hormones you can cause the plant to produce male flowers. Because you did not select a plant that produces male flowers under stress there is no genetic predisposition to hermaphroditism in the seed vs plants bred between a male and female parent. There are actually a few ways to do this, the easiest I will list here.

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Colloidal Silver (CS) [ edit | edit source ]

This is the least expensive and most privacy conscious way to produce fem seed. CS has gotten a bad name because there is so much bad information spread around about its production and concentrations. It doesn’t help that there are those who believe in drinking low concentration colloidal silver for good health and there is information mixed in about how to produce that low concentration food grade product. Follow the information here and you will consistently produce effective CS and know how to apply it to get consistent results.

Simply construct a generator using a 9-12 v power supply (DC output, if it says AC then its no good) that can deliver at least 250ma (most wall wart type power supplies work, batteries are not recommended since their output varies over time). The supply will have a positive and negative lead, attach silver to each lead (contrary to Internet rumors, you aren’t drinking this so cheap 925(92.5%) Stirling silver is more than pure enough. You can expose the leads by clipping off the round plug at the end and splitting the wires, one will be positive and the other negative just like any old battery. Submerge both leads about 2-3 inches apart in a glass of distilled water (roughly 8 oz). Let this run for 8-24 hrs (until the liquid reads 12-15 ppm) and when you return the liquid will be a purple or silver hue and there may be some precipitate on the bottom.

This liquid is called colloidal silver. It is nothing more or less than fine particles of silver suspended in water so it is a completely natural solution. It is safe to handle without any special precautions. [ citation needed ] The silver inhibits female flowering hormones in cannabis and so the result is that male flowering hormone dominates and male flowers are produced.

To use the silver, spray on a plant or branch three days prior to switching the lights to 12/12 and continue spraying every three days until you see the first male flowers. Repeated applications after the first flowers appear may result in more male flowers and therefore more pollen. As the plant matures it will produce pollen that can be collected and used to pollinate any female flower (including flowers on the same plant).

Silver Thiosulfate (STS) [ edit | edit source ]

Silver Thiosulfate is a substance that has similar principle, application and results of CS, but is more difficult to make. STS is more difficult to acquire, but it can still be obtained directly from a chemical supply company. STS is not an expensive or controlled substance.

Gibberellic Acid (GA3) [ edit | edit source ]

This is probably the most popular way to produce feminized seed, but at the same time the least effective. GA3 is a plant hormone that also causes the plant to stretch uncontrollably. It can be purchased readily in powdered form, a quick search reveals numerous sources on e-bay for as little as $15. Simply add to water to reach 100ppm concentration and spray the plant daily for 10 days during flowering and male flowers will be produced.


The genus Cannabis was formerly placed with mulberries in the family Moraceae , but is now considered along with hops (Humulus sp.) to belong to the family Cannabaceae . Whether the different strains of Cannabis constitute a single species (Cannabis sativa L.) or multiple species has been a contentious issue for well over two centuries. [1] [2]

Cannabis is well known for having two discrete subspecies, sativa and indica, each divisible into a cultivated and a wild variety . [3] Cannabis sativa male plants show evidence of selection for traits that enhance fiber production and seed-oil (for fuel) but the female plant produce seeds (for food) and flower buds that can be used as a psychoactive substance because it has higher levels of the psychoactive delta-9-tetrahydrocannabinol (THC), whereas Cannabis Indica was primarily selected for drug production and has relatively higher levels of cannabinoids (CBD) and Cannabinol (CBN) than THC, which have proved efficacious in the treatment of various chronic diseases (Cancer, AIDS, Glaucoma, Multiple Sclerosis, Brain Tumors etc.).

Botanists [4] [5] [6] According to their species descriptions, C. sativa is tall and laxly branched with relatively narrow leaflets, Cannabis indica is shorter, conical in shape, and has relatively wide leaflets, and Cannabis ruderalis is short, branchless, and grows wild in central Asia. This concept was embraced by cannabis aficionados who commonly distinguish narrow-leafed “sativa” drug strains from wide-leafed “indica” drug strains.

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A recent study of genetic variation in Cannabis supports recognition of C. sativa and C. indica as separate species, although the existence of a third species, “C. ruderalis”, is less certain. This study assigned hemp (fiber/seed) landraces and feral populations from Europe, central Asia, and Himalayan populations [7] . In 2005 a DNA study of the variation in Cannabis according to the DNA in their mitochondria and chloroplasts was conducted. The results showed three distinct “races” of cannabis. In central Asia the THC-rich indica predominated, while in western Europe sativa was more common. In India, south-east Asia, Africa, Mexico and Jamaica the rasta variant predominated. It looks similar to the sativa subspecies, but generally contains higher levels of THC. NewScientist. Despite their genetic differences, different subspecies of cannabis can be easily crossbred [8] Due to confusion about the origin of cannabis species, nomenclature is a bit misleading. Cannabis Indica is actually a subspecies of Cannabis Sativa. The original name for what we commonly refer to as Indica is Cannabis Afghanica.[Cannabis: A History, Picador; Reprint edition (May 12, 2005) ISBN-10: 0312424949]

Cannabis is used as a food plant by the larvae of some Lepidoptera species including Etymology

Hebrew קְנֵה בֹּשֶׂם qěnēh bośem > קַנַּבּוֹס qannabbôs > Greek κανναβις kannabis > Latin cannabis > English

The Hebrew Bible mentions ‘cannabis’ in myrrh , cinnamon , cannabis (qěnēh bośem) and Jeremiah 6:20, cannabis’ qěnēh bośem appears to have already abbreviated into the later Hebrew form qannabbôs, which is attested in Post Biblical Hebrew literature. Thus, the Septuagint did not recognize the Hebrew expression ‘reed of balm’ and mistook it to refer to some unidentified plant. As a dynamic equivalent, the Septuagint rendered it as ‘calamus’ (Greek kalamos), which indeed is a ‘balmy’ (scented) reed. The calamus plant was known in Greek mythology and processed into an aphrodesiac. Even so, the original Hebrew term qěnēh bośem is an archaic form of the word qannabbôs and means ‘cannabis’.

The Scythian term cannabis probably derives from a Semetic origin as well. Greek word kannabis shows that the word came down from the Common agriculture started, hemp as a cultivated plant spread widely, carrying its name with it. Source of Rus. konoplja, Pers. kanab, Lith. kanapes “hemp,” and Eng. canvas and hemp.


Cannabis is a plant and therefore production is relatively easy. The main distinction in production is whether it is grown indoors or outdoors, with other distinctions involving specific growing methods or materials.

Indoor cannabis production sometimes takes the form of ” Production phrases

    Indoor is cannabis grown indoors. Generally, indoor cannabis is more aesthetically pleasing than outdoor because of the protection it gets inside, though there are obviously exceptions as this depends on a number of factors.

      Hydroponics (often abbreviated to “hydro”) is a method of growing where the plants are grown in water and a medium routinely flushed with nutrients. Some growers use fish aquariums housing feeder fish, whose waste provides the necessary nutrients. This technique, known as Cannabis trade

    Certain types of cannabis that are unique to a particular area, such as Hempfest and an extremely high number of local growers, and a popular place for importing large quantities of high-quality cannabis. At the southernmost end is Mexico, which, although mainly known for low-quality cannabis, facilitates the trade of highly potent strains from southern Mexico and Distribution

    Cannabis is generally sold by weight, with the smallest quantity being a gram or an eighth of an ounce (3.5 grams). Most commonly a local grower will give cannabis to a distributor, who then weighs the crop into a certain quantity (varying by area and demand) and sells to other distributors. Cannabis can be distributed in many steps through this loosely-hierarchical method, with the price per weight often going up at each level.

    Specific terms regarding the sale of cannabis and their meanings can vary widely between areas and users, with some being more common and generally understood than others. For more, see Wiktionary Appendix of Cannabis Slang.

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