Harvesting Cannabis Seeds

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Breeders have begun specializing in the cultivation of cannabis seeds. Find out more about how breeders pay special attention to the pollination, harvest time, and drying process for the seeds to improve the likelihood of a successful harvest. Amsterdam Seed Supply – Not sure when to harvest Marijuana seeds? Look no further – Buy Marijuana seeds – Discreet shipping It's every marijuana cultivator's dream: to produce your own cannabis seeds and have a truly home-grown harvest for your next crop.

The Importance of Collecting and Harvesting Cannabis Seeds

T here was a time in our not-too-recent history when a sack of weed almost always included seeds. However, as cannabis cultivation evolved, so did the demand for sensimilla, or high-quality, seedless cannabis. Breeders not only began developing their own customized strains, they also started specializing in the cultivation of very special cannabis seeds. These seeds are used in both the breeding process and the wide-spread distribution of the carefully created strain itself.

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The Role of Seeds in the Breeding Process

The process of breeding the perfect strain requires a controlled production of seeds. Breeders must force their favorite plants to produce pollen and then use it to pollinate other favorite strains, thus creating “cross-breeds” of their two selected parents. Note that this process is not haphazard like the seeds one might find in a poorly-controlled outside marijuana grow – cannabis seed cultivation is a precise process that requires controlled, sanitary environments that are thoroughly sealed to prevent outside dander from getting in.

The plants can “veg” here, or continue their vegetative growth phase if trying to increase their size before seed production begins, but it’s not necessary. Once the plants are large enough, they are put into a flowering light cycle of 12 hours light and 12 hours of complete darkness.

Within a few weeks, the male will produce pollen sacks which will soon burst and get carried off into the air to pollinate the females. The females will now produce seeds which may continue to be used in the breeding process or harvested and sold to the public.

For the purpose of seed production, only around 20 females are recommended per male. However, a single male can realistically pollinate hundreds of females, hence the importance of a tightly sealed environment during the seed production process.

Natural Cannabis Seed Production

Cannabis is an amazingly resilient plant and doesn’t require male pollination to produce seeds. Evolution has bestowed upon the cannabis plant an amazing ability to self-pollinate when there are no males around to do it for her. Whether stressed or old (for example, a female cannabis plant that is not harvested before her prime), if a female senses an environment that is not conducive to long-term growth, she will produce seeds in hopes that her legacy will continue.

This is how feminized cannabis seeds are produced. Breeders will carefully stress a healthy female plant to “trick” her into thinking her life or safety is in danger.

One common method is to stress the female by applying solutions like colloidal silver or silver nitrate generously onto the leaves when she first enters the flower light cycle. Within 3-4 weeks, male sex organs will appear on the nodes of the female plant. Please note, applying these stress-inducing solutions to plants renders them unsmokable. The particulate cannot be washed off thoroughly because it settles deep into the surface of the plant. This method is for seed production only.

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Another method is to simply let a healthy female age. If she grows past maturation, she will produce male “banana” pollen sacks without any male chromosomes. Though she may look like a hermaphroditic plant at this point (one containing the chromosomes of both male and female), the pollen she produces will contain only XX chromosomes and therefore cannot pass the Y (male) chromosome down to its heirs. Pollen collected in this way is then used to pollinate another female which will then produce female-only seeds.

How to Collect Cannabis Seeds

Though many grow ops aim to do away with seeds to grow fine sensimilla instead, sometimes breeders want seeds. Whether to grow their own crops or to sell to a demanding public, cannabis seed cultivators have their goals set on producing healthy, happy seeds in lieu of big, beautiful buds.

Seed crops are harvested when the seeds are plump and dark, often with a tiger stripe appearance (around six to eight weeks into flowering).

After harvesting, the bud is dried and the seeds are collected. Small-scale seed collection is done by simply crumbling the cannabis flower and collecting the seeds that fall out (this video by Johnnys Green Extractions offers a clever way to separate seeds from flower using an old vinyl record cover).

Commercial seed collection usually involves special machines that crush dried flower then pass the trim and seeds into separate bins. After seeds are collected, they’re stored in opaque, air-tight containers to prevent them from rotting or sprouting prematurely.

Conclusion

Though cannabis flower is usually cultivated to be seedless, sometimes the seeds are the whole point. Breeders pay special attention to the pollination, harvest time, and drying process when growing cannabis specifically for the seeds to improve the likelihood of a successful harvest.

Frequently Asked Questions

How are Feminized Seeds Made?

Feminized seeds are made by inducing a female plant to produce seeds without being pollinated by a male. These resulting seeds will not contain a male Y chromosome, only retaining the two X chromosomes from the female plant, and thus all of the resulting seeds will be female. This process can be done by stressing the plant, altering it with chemicals, or allowing it to grow past its harvesting time.

How Many Plants Can a Male Cannabis Plant Pollinate?

For professional production, it is recommended to pollinate about 20 female plants per male plant, but this is done to ensure tight oversight and quality control. In the wild, a single male plant can pollinate hundreds of female cannabis plants.

Can You Smoke Cannabis That Has Been Treated with Colloidal Silver?

No, colloidal silver is only used on plants raised for seeding purposes, it makes the plants that it is sprayed on unsmokable.

How are Strains Crossbred?

Cannabis breeders create crossbreeds by using the pollen of one strain to pollenate seeds with another strain. The resulting seeds will have genetics from both parents. These new plants are selected by their desirable traits and then stabilized through further breeding, typically using the genetics of their parent strains.

Have you ever harvested cannabis seeds? Share your experiences in the comments below!

Author

Abby is a writer and founder of Cannabis Content, a marketplace designed to connect cannabis writers and creatives with businesses in the industry. She has been a professional cannabis writer since 2014 and regularly contributes to publications such as PotGuide and M&F Talent. She is also the Content Director at Fortuna Hemp, America’s leading feminized hemp seed bank. Follow Abby on Facebook, Twitter, and Linkedin.

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When To Harvest Marijuana Seeds?

After the whole process of germination, growth and flowering, a lot of growers ask themselves when to harvest Marijuana seeds. Usually, the breeders will include a suggested flowering time for each strain, but as a rule of thumb, Indica marijuana plants harvest in 6-8 weeks while Sativa Marijuana plants take 10-12 weeks.

Look for these signs for when to harvest Marijuana seeds

You can also judge the ripeness of the Marijuana by taking a look at the trichomes; or little hairs/crystals on the flowers and surrounding areas of the Marijuana plant. If they are transparent its still too soon, if they are milky white they are ready and if they turn brown they have become over-ripe. It is also advisable to follow the instructions to harvest Marijuana seeds on the packet since most reputable breeders also have a tried and tested flowering time for optimum ripeness, potency and flavour of a Marijuana strain.

If you meant when to harvest seeds from cross-pollinated Marijuana plants, then the seed will fall from the flower by itself once it is mature and ready to germinate into another Marijuana plant. Usually, as a best practice to harvest Marijuana seeds, some growers wait for the whole flowering cycle to end just as if they were harvesting the flower.

You might find our FAQ Submission How Do I Harvest My Plant? useful

How to Harvest Your Own Cannabis Seeds

Congratulations! You’ve mastered the art of growing your own marijuana plants from seed and clone, and you’ve succeeded in bringing in a number of fruitful harvests. Perhaps you’ve even found a couple of strains along the way whose plants produce such a scrumptious bud that you have a new goal in mind: to produce your own cannabis seeds and have a truly home-grown harvest for your next crop

Table of Contents

Woah There, Tiger

As with most forms of sexual reproduction, in order to produce marijuana offspring (or cannabis seeds), you need a male and female plant. A male plant can produce pollen, which acts as a fertilizing agent in female plants, around two weeks before a female plant is ready to receive it. Because of this difference in sexual maturity, it is important to keep your male plant alive and thriving as you wait for your female plant to reach maturation. You can do this by pruning the male’s quick-growing buds and allowing the slower-growing flowers time to mature at a more leisurely pace.

When the Moment’s Right

Once the female plant has begun to produce flowers of a decent size with a number of long hair-like pistils, she is ready to receive the male plant’s pollen. There are two ways to approach the actual pollination stage: you can stick male and female together and let nature take its course, or you can manually pollinate specific female branches.

Au Naturel

The first option is the easiest up front, but will ultimately take the most effort on the part of the grower. Essentially, when both male and female plants have reached maturation, you should place them next to each other and shake the male plant. This shaking will encourage a release of pollen, which will spread around the air and land throughout the female plant. Repeat this step once or twice a day for two days to ensure fertilization.

If the female plant is fertilized this way, there is no way to control how many cannabis seeds are produced, or where on the plant they come from. When it is time to harvest, you will notice that most, if not all, of your bud has a plethora of seeds buried within. In addition to being a lot of work, this mass production of seeds can be very wasteful. Growers may not have enough room to plant all of the seeds, and the leftover bud will be less robust due to the female plant’s energy being put into seed production.

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Doing It by Hand

The second, more popular option is to pollinate specific branches on the female plant with pollen from the male. Before you get down to the dirty deed, you need to put in some prep time for both the male and female plants. First, turn off all fans and air circulation devices. For the female, prune the lower branches as well as the fan leaves that surround the branch or branches that you wish to pollinate. After preparing the female plant, clip off some of the more attractive and full-looking flowers from the male plant and place them in long paper wine bags (at least one good-sized flower per bag).

Now it’s time to pollinate. Carefully slide the paper bag with male flower around the prepared branch of the female plant. When the entire branch is covered, tightly close the end of the bag at the base of the branch using a zip-tie, string, or tape that will peel easily (such as masking tape or painter’s tape). Once the bag is secured, shake it strongly to encourage the spread of the pollen. Over the next couple of hours, repeat the shaking process one to two more times.

When removing the bag after pollination, be careful not to jostle the branch or the flower inside the bag. This could lead to accidental fertilization of other branches on your female plant (or surrounding plants). Although this requires more specific and detailed work up front, you will thank yourself later. This method of fertilization will provide you with enough seeds to plant for your next crop, while not overwhelming your female plant with seeds in every bud.

Bun’s in the Oven

Now you play the waiting game. Continue caring for and pruning your growing plants, and keep an eye on your female for the signs of fertilization. Once pollinated, most cannabis seeds will fully ripen within 4 to 6 weeks. You should expect to leave your fertilized flower on the plant longer than the bud that is not fertilized.

A ripened seed is structurally sound and dark brown or tan in color, often (but not always) with obvious stripes along the outside. The harvesting process is relatively simple. Simply dig into the fertilized flower and pull out the seeds. Don’t worry about messing up your bud harvest: female flowers that have been fertilized expend a lot more effort into growing seeds than producing THC, so the fertilized bud will not be nearly as potent to consume as the rest of the plant. (Of course, you can still use the seedless fertilized flower for shake, melting into butter, or making other edibles.)

The Circle of Life

Once you harvest your cannabis seeds, the next step is to plant them and start the entire process over again. If you’re not ready to start a new crop just yet, don’t worry. You can freeze the seeds and they will retain their ability to germinate.

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