Seeded Weed

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As both drug cannabis and hemp cultivation proliferate, agronomic challenges lurk on the horizon. But there are solutions. I have an indoor growroom and in my recent harvest I found seeds in the buds, but I’m sure there are no male plants in the room. Hey guys, out of curiosity, I'm wondering, if a female plant gets pollinated by male plant's pollen and it starts developing seeds, would it be better to…

The Challenges of Seeded vs. Seedless Cannabis

As both drug cannabis and hemp cultivation proliferate, agronomic challenges lurk on the horizon. But there are solutions.

Temperate regions of Australia produce low-THC cannabis crops grown for their edible seeds and seed oil. Hemp seed crops release clouds of male pollen grains, each with the potential to fertilize a female flower and form a seed. The male pollen plants then wither and die.

Today, a multitude of cannabis seed companies are producing more seeds than ever, and now that laws are changing, more and more cannabis crops are being grown outdoors from seed.

Broadacre (farms that produce crops on a large scale) CBD producers are leading the return to growing crops from seed. Auto-flowering THC and CBD varieties are gaining popularity (especially in regions exceeding 40° latitude north or south) where summer days are too long to induce flowering in most cultivars.

But the growing of seed crops can cause problems. Put simply, the airborne pollen from seed crops poses a serious threat to the much more lucrative business of growing seedless drug cannabis flowers.

Morocco: En Route to All-Female (Seedless) Crop Production

Morocco, where crops destined for hashish production are seeded, is on a steady path toward all-female seedless crop production. The popularity of feminized seeds, which produce only female plants, has grown exponentially, yet nearly all modern Moroccan drug crops still do not start from these because many growers continue to sow seeds that they harvest (rather than purchasing new seeds), and crops grown from these seeds are half male and half female. Pollen fills the air in mid-summer, and by autumn every female plant is full of seeds. (When females are pollinated, their flower growth is reduced, and the seeds produced are undesirable for end consumers.) Morocco’s future of not harvesting seeds is clearly on the horizon as awareness amongst farmers and widespread availability of less expensive female seed are slowly becoming reality.

Left: Modern-day seedless drug cannabis crops are grown from genetically identical female cuttings so that no pollen and no seeds are produced (photo by Mel Frank). Right: East Asian farmers harvest their highest-quality hemp fiber crops before they flower, so no pollen or seeds are produced.

Biology Meets Agronomics

Most plants produce flowers bearing both male and female sexual organs, and the majority of these are pollinated by various animals ranging from insects to bats. In natural settings, Cannabis plants present an exception to the norm, with millions of pollen grains borne on male plants that release their genetic potential into the breezes. Those pollen grains that complete their reproductive journey land on the receptive ovule-containing flowers borne on female plants and fertilize them, the seeds maturing a few weeks later. Individual male plants die within a few weeks, leaving the remaining pollinated female plants to mature their precious seeds (the next generation) without competition for water, nutrients and sunlight.

In another exception to the norm, separation of the sexes is the key to horticultural cannabis flower production. Both THC and CBD drug cannabis crops are grown without seeds. The sinsemilla (seedless) method is commonly used to enhance the production of secondary metabolite target compounds such as THC, CBD and aromatic terpenes. When seedless Cannabis is grown for drug production, any seeds are undesirable and drastically lower the value of the dried flowers. Early sinsemilla growers realized that they could simply remove all male plants so no seeds formed, and their precious females would develop much larger and more potent flowers. Female plants with desirable traits were vegetatively reproduced to multiply the clones in common production today, and there are no longer troublesome male plants in most modern drug crops.

We believe seeds producing all-female crops will be widely used for broadacre THC and CBD production in the near future. Why grow any males when you can grow only females, and why keep mothers and make cuttings when you can more easily, efficiently and cheaply sow seeds that are essentially a female cutting in seed form?

This sounds like a perfect scenario. What could possibly go wrong?

What Is Industrial Hemp?

Today’s common concept of “industrial hemp” crosses regulatory boundaries between traditional hemp (grown for its fiber and/or seeds) and drug cannabis. According to the Agriculture Improvement Act of 2018 (commonly referred to as the U.S. Farm Bill), any Cannabis plant (or cannabis product) containing less than 0.3 percent THC (with no limits on CBD content) is legally classified as “industrial hemp” no matter whether its end use is for fiber, seed and/or drugs. A more accurate term for high-CBD cannabis is “medicinal hemp” as it reflects both its end use and its low THC content.

Significant CBD levels (commonly 2 percent to 5 percent dry weight) are extracted from the flowers of hemp fiber and seed cultivars grown in many regions of Europe and China. Much of this CBD yield comes from multi-product hemp crops also yielding fiber and seed commodities. Across North America, CBD is largely extracted from modern, high-CBD drug cultivars that are much more closely related genetically to modern sinsemilla hybrid drug varieties than they are to hemp fiber and seed cultivars.

Enter Traditional ‘Industrial’ Hemp

In Europe and North America, hemp fiber crops have traditionally been harvested upon reaching technical maturity when the male plants begin to shed pollen. In eastern Asia, hemp fiber crops destined for fine textile production are harvested before they flower, and therefore no pollen or seed is produced. No flowers, no pollen and no problems. The timing of a fiber crop harvest—either before or after it releases pollen—determines whether it poses a threat to neighboring sinsemilla cannabis growers. Depending on cropping techniques, fiber hemp production can be compatible anywhere. The real issue is not about fiber hemp production, but seedless drug cultivation. However, the situation differs with hemp seed crops.

Hemp-seed crops are grown specifically for seeds sold primarily to the food and body-care industries. Hemp seed and seed oil are more in demand than at any other time in recent history, and the profitable growing of hemp seed is increasing at suitable temperate latitudes worldwide. Based on their common environmental needs, seedless drug cannabis thrives in the same agricultural niches as hemp seed crops, and this can lead to competition between these agronomically incompatible crops.

Long-distance Cannabis pollen transport is well-documented. A single male Cannabis plant can produce millions of pollen grains that are easily carried on the wind. Each summer, allergenic pollen traps installed along the Mediterranean coast of southern Spain collect Cannabis pollen that drifts across 100 miles of open sea from hashish fields in the Rif Mountains of Morocco.

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Field-grown hemp seed crops are agronomically and economically incompatible with drug cannabis crops, and growing them within the range of pollen travel will likely result in conflicts. Even cannabis plants grown in greenhouses and grow rooms can become fertilized by pollen that enters through the ventilation system. It is of note that during the early days of industrial hemp cultivation in the Netherlands several indoor and glasshouse sinsemilla growers reported finding seeds in their normally seedless crops. (Tip: High efficiency particulate air (HEPA) filters effectively remove pollen from air intakes in sealed grow rooms.)

In the sinsemilla setting of zero tolerance for seeds, long-range pollen drift, especially outdoors, sounds frightening. Reactionary voices within the cannabis community have raised the alarm, but is there a real threat? How are the cropping strategies of growing seeded hemp cultivars for their CBD content versus growing seedless drug varieties for THC and/or CBD content playing out across North America and worldwide?

HempFlax BV farmers in Romania harvest hemp fiber, hemp seed and CBD from the same standing crop. Multi-cropping strategies are the most economically viable for broadacre cannabis commodity farming.

International Precedents and Lessons

In response to increased market demand for both hemp seeds and CBD, traditional hemp cultivars’ flowers are now commonly grown to produce both CBD and seed. Hemp stalks are harvested for their economically valuable fiber from both the male and female plants, while female flowers produce economically valuable compounds such as CBD, THC and aromatic terpenes as well as seed. Broken flowers remain after threshing hemp seeds. Until recently, this CBD-rich waste was burned in the fields. Now, CBD is extracted from the flower biomass. Several hemp cultivars contain sufficient amounts of CBD to make extraction profitable.

We perceive the most lucrative agronomic model to be triple cropping an existing approved (low THC) industrial hemp cultivar for fiber, seed and CBD. HempFlax BV, a hemp cultivation and processing company with cultivation sites in the Netherlands, Germany and Romania, harvests all three products from the same standing crop. This lucrative cropping strategy allows a farmer to make agronomic decisions based on three commodity markets—fiber, food and drug—and we predict will prevail in the near future among progressive farmers worldwide.

China and Romania are traditional hemp farming regions without commercial seedless drug cannabis production. Manitoba farmers have dominated North American hemp grain seed production for 20 years and have established Manitoba as a hemp seed producing region. Few outdoor sinsemilla growers would attempt to establish production there. Rather, drug cannabis is more often grown indoors in urban areas, and in glasshouses and outdoors in regions without hemp seed crops. To that end, conflicts are rare, but could still arise.

In most drug cannabis producing regions (e.g., Colombia and Mexico, as well as the Caribbean, Africa and Southeast Asia) crops are grown seedless to increase the flowers’ potency. It would be unwise to attempt growing seeded crops in these regions. In all these examples a pairing of local traditions with economic factors determines whether Cannabis crops are grown with or without seeds.

Several of the aforementioned agricultural business models could prove economically viable in any given region, but many are not mutually compatible. The agricultural differences among broadacre, greenhouse and indoor production create an economically segregated terrain where few conflicts have yet to arise. However, conflicts will undoubtedly arise unless specific cannabis growing regions become set aside for female-only growing of seedless drug crops.

North American Constraints

In the face of steadily expanding seedless drug crop acreage bolstered by supportive legislation across America, will there remain anywhere for hemp grain seed crops to make their long-awaited comeback? Will the U.S. always rely on Canada and China for healthy hemp seed products?

The expanding range of Farm Bill hemp (high-CBD seedless flower) production in 2018 reached 23 states. Colorado and Montana, leaders in U.S. hemp production, each grew more than 20,000 acres, followed by Kentucky and Oregon with around 7,000 acres each, and Tennessee, North Carolina, North Dakota, New York, Nevada, Wisconsin and Vermont had from 1,000 to more than 3,000 acres under licensed cultivation. More than 78,000 acres of Farm Bill “hemp” were grown in 2018 nearly, tripling the less than 26,000 acres grown in 2017.

Now, private citizens as well as agricultural entities across North America are increasingly allowed to grow both industrial hemp (including hemp grain seed crops) as well as seedless drug cannabis for medical and adult use. In some areas this situation sets the stage for potential conflicts until industry self-regulation and enlightened agricultural policies take effect. In the meantime, most regions appear to offer opportunities for everyone.

However, the situation is becoming increasingly convoluted. The U.S. landscape is a complex puzzle of differing jurisdictions, each with its own evolving cannabis scenarios and range of regulatory solutions. Until the advent of the CBD industry, industrial hemp cultivation held little attraction in most regions of the U.S., and largely due to prohibition, most seedless drug cannabis was grown either in remote rural or insular urban settings isolated from any hemp pollen. Many newly cannabis-tolerant jurisdictions may allow Cannabis plants to be grown for whatever end use someone might choose—be it fiber, seed and/or drug.

In many regions across North America, sinsemilla growers arrived decades earlier than the recently arrived “hemp” growers. North American sinsemilla growers pioneered drug cannabis cultivation and established their turfs long ago, largely in agriculturally marginal rural areas not well-suited to broadacre hemp fiber and seed production. California presents several cases in point.

Sparsely populated rural regions of Northern California have been the primary producers of sinsemilla since the 1960s, and since the 1980s indoor, artificial-light growing has become increasingly popular in more urban regions with access to the electrical grid. The established agricultural precedent in both scenarios is drug cannabis production. So far, industrial hemp and hemp seed crops have had little, if any, effect. It is really up to the growers of seedless high-THC and high-CBD drug crops to defend their turf (especially outdoor cultivation, which is common in California and expanding elsewhere) from the potential pollen threat of seeded crops.

Seeds or Seedless: What’s the (End) Use?

Seed-grown cultivars will always remain popular for broadacre farming of hemp seed and fiber crops as well as cannabinoid and terpenoid crops. We predict that consistently improving newly developed clones will feed the connoisseur cannabis (drug) dry flower market, while broadacre cultivation from seed will supply the majority of future market demand for extract-based products worldwide.

On the West Coast, state cannabis grower associations are striving to establish sinsemilla production regions based on climate and terroir similar to the appellation system used in wine branding. These groups have grown organically from illicit rural grower communities and provide good examples of self-regulation of our industry from within by a group of peers. Appellation membership will likely require qualified farmers to grow only female plants from cuttings, and the sowing of seeds (a possible source of male plants and contaminating pollen) will be strictly controlled.

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Both industrial and medical hemp crops are most profitably produced under broadacre agriculture, while sinsemilla flower crops are most profitably produced under glass. California’s Sacramento, San Joaquin, Imperial and Salinas valleys present examples of regions where potentially conflicting business models may clash. Many growers in these traditionally broadacre farm and orchard regions have switched to glasshouse production of vegetables, bedding and house plants, and cut flowers. Sinsemilla flower growers will move into regions where glasshouses are readily available, and local regulations usually stipulate that existing glasshouse infrastructure must be utilized. This places seedless growers near neighboring broadacre farms where it is also economically feasible to grow fiber and seed hemp.

Southern California provides an even more dynamic terrain. As urban areas grow, cultivators occupy former farmlands that still border active agricultural zones. And, traditional broadacre farming regions that previously grew few if any sinsemilla or hemp crops are now open to the growing of either one or both.

These scenarios exemplify the need for agricultural authorities to take responsibility for local regulation of their cannabis industries before conflicts between growers arise. There are few established historical and agricultural precedents for either sinsemilla or hemp growing in prime agricultural regions. These areas produce many crops profitably, and as with other crops, are where the future of commercial cannabis production for many different products will be focused.

Buffer Zones

Given that sinsemilla (seedless) growers have zero tolerance for seeds in their flowers, buffer zones around pollen-producing crops should start with at least a 10-mile radius. Safe distances should be increased to up to 30 miles or more if the pollen source is a broadacre grain seed field or if seedless crops are established down wind of seeded crops. Agriculture officials can make “pollen risk” assessments and generate pollen maps for mixed cropping regions where both seedless and seeded crops may be grown. Local cannabis appellations can enforce their own in-house rules to ensure that members remain compliant by growing only female cuttings.

In addition to industry self-regulation, agricultural policies concerning cannabis cultivation will become agriculture department initiatives, influencing state and eventually federal legislation to delineate which regions are reserved for broadacre hemp seed, hemp fiber and/or drug production from seeded plants. We expect that farming regions where broadacre agriculture is already the norm and where fewer sinsemilla growers operate than many other regions will be where hemp seed and fiber crops will be grown. Sinsemilla growers simply won’t settle in these regions, and the few who live there already will likely move.

Regulatory allowances must also be made for certain branches of our industry. Drug cannabis breeders rely on sowing seeds in their search for novel traits, and cannabis seed companies rely on carefully controlled pollinations to produce consistent offspring. The threat of stray pollen is minimal, and seed companies should be allowed to responsibly produce small amounts of pollen for research purposes.

Many suffered and lives were lost in disputes between frontier cattle and sheep grazers over the best use of Midwestern grazing pastures. Let’s hope our cannabis community will have the foresight to avoid predictable calamities. There are many economic factors in the mix, and guidelines for establishing enlightened agricultural policies in each region should be established soon before push comes to shove. In the end, it is really about growers gaining deeper awareness of their local situation and doing their best to be good neighbors.

Solutions

How will various jurisdictions with differing constituencies and priorities create equitable policies for the control of stray cannabis pollen in sinsemilla-only areas?

People are quirky, and there will always be a few individuals who will grow fiber or seed hemp in regions where drug crops are commonly grown, and there will be others who try to grow seedless cannabis flowers where seed hemp is well established, but these will be exceptions to the local norms. Across North America, effective and fair regulation of our burgeoning cannabis industry will largely rely on understanding which branch of our industry was established in each region first, and whether a precedent exists for its continuation; ultimately, policy decisions will be based on which end use offers the most income (including compliance costs, local trade, employment and taxes) to local and state jurisdictions.

Local, state and federal agriculture organizations should ultimately control cannabis licensing and permitting, first in local jurisdictions and eventually nationwide. Agricultural officials must take stock of regional conditions and become sensitive to the unfolding cannabis industry and determine the traditional basis for cannabis economics in their region. If sinsemilla growers have contributed to the economic viability of their local economy, albeit illegally, then they should be invited to have a strong voice in determining future cannabis policies and regulations.

Mojave Richmond is the developer of many award-winning varieties such as S.A.G.E., which served as a springboard for creating many notable cultivars. Richmond is a founding member of the international consulting company BioAgronomics Group. [email protected]

Robert C. Clarke is a freelance writer, photographer, ethnobotanist, plant breeder, textile collector and co-founder of BioAgronomics Group Consultants, specializing in smoothing the transition to a wholly legal and normalized cannabis market. [email protected]

I have an indoor growroom and in my recent harvest I found seeds in the buds, but I’m sure there are no male plants in the room. I’ve heard that light leakage can cause plants to become hermaphrodites. Is this true, and if so, do you have any tips for avoiding this?

Cannabis plants are monecious. This means they have the ability to be either male or female. Or in the case of hermaphroditism, they can be both. The reason to make sure there are no males or hermaphrodites in your garden is because male flowers make pollen. When pollen touches the white hairs on a flower, it makes a seed, and seeded weed gives you headaches. Even though there are reasons in nature hermaphroditism could be important, such as continuing the species in case there is no male present, hermaphroditism is generally a bad thing when talking about cannabis plants.

Light poisoning is the most common cause for a normal plant to hermaphrodite.

Light poisoning refers to the flowering night cycle of a plant being unnaturally interrupted with light. The best way to prevent this is to close yourself inside your darkened room during the daylight, and then after allowing a few minutes for your eyes to adjust to the dark, check for any light leaks from covered windows, door jams, etc. Also cover all timer and appliance lights with tape.

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Negative stressors can combine with small interruptions of the light cycle to cause hermaphroditism, especially with less-stable, clone-only hybridized strains. When the night cycle is abnormally interrupted, it sends a mixed hormonal signal to the plant. This can cause a full female plant to throw some male flowers. Male flowers are easy to identify, especially when side by side with female flowers. Male flowers look like small bunches of bananas, which will take a week or two to swell before they burst and release their pollen.

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Finding a hermaphrodite in your growroom can happen at any stage of the flowering cycle and is indicated by the presence of male flowers growing on the same plant as female flowers. As with all species in nature this can occur in varying degrees. A plant can become slightly or majorly hermaphroditic. In cases where singular male flowers are found between the branch and stalk nodes, you should be diligently removing them as they grow. You must re-inspect the plant top to bottom every few days to be sure pollination and seeding doesn’t occur. If you find male flowers (anthers) actually growing from within the female flowers (buds) the situation is a little more dire. You can still remove all the male anatomy as it appears, but it will be harder to find and much more prevalent. This is a horrible discovery that leads to a tough decision: Should you let the plant live and risk the whole crop being ruined by seeds?

In either case, once hermaphroditism has compromised the safety and purity of your sensimilla, the plant should not be propagated further. Remember, once a hermy, always a hermy. The plant pictured here is in the tenth and what should have been the final week of ripening, but a timer failed and one light stayed on continuously for almost two weeks, causing this vegetative regrowth. Because the light was continuous, the plant made no pollen. This method of re-vegging can be used to save a flowering plant you have no copies of, but be careful, as this may cause some strains to hermaphrodite.

Purposefully causing a plant to hermaphrodite is called selfing. Gibberellic acid or colloidal silver is typically sprayed onto the female plant. This technique is used to make feminized seeds and uses the plant’s ability to be both male and female to force a female plant to produce male flowers. The pollen contained in these male flowers can only produce female seeds. Just keep in mind that feminized plants should not be used for breeding, as they were produced without a true male, making them genetically inferior.

How good is seeded weed ?

Hey guys, out of curiosity, I’m wondering, if a female plant gets pollinated by male plant’s pollen and it starts developing seeds, would it be better to chop it earlier ? to avoid all the plant using to much THC and energy to develop seeds ?

How good can weed that has seeds be ? I mean i will remove and not smoke the seeds, just curios about the high u get from this kind of bud .

Hydrotech364
Well-Known Member

Can Ya say that in English Lol?If You have a Mom bearing seed She will take longer to finish but are just as powerful.However if You have a Hermie that has been playing with itself and has umpteen gillion seed’s it sux.

Lo Budget
Well-Known Member

IMO, it’s better to ride it out than to chop early. Seeded weed can still be pretty good, better than immature weed.

LokoTrashman
Active Member

I hope it will be very good , it had a long vegetative stage for almost 4 months.

I also have a huge hermie plant, that has massive buds, and they are all frosty by now (yum) haha, I would like to know if they can be really good ? given how they look.

greenlikemoney
Well-Known Member

OK, do you have a hermie plant or do you have a female plant that is throwing nanners? Many people call them both “hermies” but that’s not actually correct. Which do you have?

Hydrotech364
Well-Known Member
LokoTrashman
Active Member

OK, do you have a hermie plant or do you have a female plant that is throwing nanners? Many people call them both “hermies” but that’s not actually correct. Which do you have?

It was a plant that first showed pistils but in about 1 week or so it started growing balls as well i think it was genetic not stress related that caused a hermie. I have separately a small plant that has a ways to go till finish, it first grew balls and recently developed a few pistils.

Curious about the big hermie is that, it has buds that have little to no balls and entire buds that are all balls (that have opened by now).

greenlikemoney
Well-Known Member

Sounds like you have hermies, shoulda killed them long ago and bought quality seeds. My guess is you are growing bagseed, no?

oldtimer54
Well-Known Member

Back in the day. many moons ago all we had was seeded weed and it got me mucho stoned. There is nothing wrong with letting your pollinated female go full term hell if everyone did that it would run the seed dealers out of business go for it homie hell I try every year to make my own seeds and this year was no exception.
Just think you’ve just created something that no one has ever smoked before take pride in that !

MonkeyGrinder
Well-Known Member

Sounds like true hermies if you haven’t stressed em. If you’re over the 3/4 mark in flowering time I say ride it out. If they popped banners with no stress though I personally wouldn’t further the line by using or passing on the seeds. Just start pulling nanners like mad when you see em.

GvegasGrowa
Well-Known Member

Back in the day. many moons ago all we had was seeded weed and it got me mucho stoned. There is nothing wrong with letting your pollinated female go full term hell if everyone did that it would run the seed dealers out of business go for it homie hell I try every year to make my own seeds and this year was no exception.
Just think you’ve just created something that no one has ever smoked before take pride in that !

I agree. Has it really gotten to the point were ppl have never smoked shwag. Before the days of the interweb every bag had seeds. Ocassionally we’d get “hydro”. that meant it was good & had no seeds. I never knew why tho. Never questioned it either. Youd hear stories about this guy some1 knows who grew weed without dirt. but that was bullshit. Everybody knew weed came from mexico. nancy reagan wouldnt lie.

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