Cannabis seeds 101: How to grow marijuana from seed
Cannabis is grown from one of two sources: a seed or a clone. Seeds carry genetic information from two parent plants and can express many different combinations of traits: some from the mother, some from the father, and some traits from both.
In commercial cannabis production, generally, growers will plant many seeds of one strain and choose the best plant. They will then take clones from that individual plant, which allows for consistent genetics for mass production.
If cannabis is legal in your state, you can buy seeds or clones from a local dispensary, or online through various seed banks.
Cannabis seeds vs. clones
For the typical homegrower, it may be easier to obtain cannabis seeds rather than clones. Growing from seed can produce a stronger plant with more solid genetics.
Plants grown from seed can be more hearty as young plants when compared to clones, mainly because seeds have a strong taproot. You can plant seeds directly into an outdoor garden in early spring, even in cool, wet climates.
If growing outside, some growers prefer to germinate seeds inside because they are delicate in the beginning stages of growth. Indoors, you can give weed seedlings supplemental light to help them along, and then transplant them outside when big enough.
Most seeds that you will buy are regular seeds as described above, but here are a couple more types.
How weed seeds work
Cannabis can be either male or female—also called “dioecious”—but only females produce the buds we all know and love. For reproduction, males have pollen sacs and pollinate females, causing female flowers to produce seeds.
Once cannabis seeds are mature, the female plant begins to die, and seeds are either dropped to the ground where they grow into new cannabis plants next spring, or the seeds are harvested for processing into seed oil or food products, or stored so they can be sown in the ground later and become the next generation of plants.
To get the buds found in medical and recreational stores, female cannabis plants are grown in an environment without males—or the males are removed from the area before they release pollen—so the females don’t create seeds. Females can then focus their energies on producing buds and not seeds—this high-potency marijuana is traditionally known as “sinsemilla,” meaning “seedless.”
Some varieties of cannabis can produce male parts alongside female flowers on the same plant, especially if exposed to environmental stressors. These plants are known as hermaphrodites, and sometimes they can self-pollinate to create seeds.
Pros and cons of using cannabis seeds
Check out Johanna’s full video series on how to grow weed on Leafly’s YouTube .
If buying from a reputable breeder or seed bank, growing from seed is the best way to ensure your plants will have solid genetics and start clean, meaning they won’t come with diseases or pests.
Also, buying from a reputable breeder or seed bank will give you a sense of what a particular strain will look and smell like, how it will grow, and how much it will yield at harvest.
The main drawback to growing from seed is there is no guarantee as to what you’ll end up with—if you buy a regular pack of cannabis seeds, it will be a mix of males and females. You’ll need to sex them out (more below) to identify the males and get rid of them, because you don’t want your females producing seeds.
Sexing marijuana plants can be a time-consuming process, and if you don’t catch males, there is a risk that even one males can pollinate your entire crop, causing all of your female weed plants to produce seeds.
One way to avoid sexing plants is to buy feminized seeds (more below), which ensures every seed you plant will be a bud-producing female.
You can also minimize headaches and avoid the hassle of seed germination and sexing plants by starting with clones.
How weed clones work
Aside from producing cannabis through seeds, or sexual reproduction, you can also reproduce the plant through cloning, or asexual reproduction. A clone is a cutting that is genetically identical to the plant it was taken from—that plant is known as the “mother.”
Pros and cons of using cannabis clones
Through cloning, you can create a new harvest with exact replicas of your favorite plant. Because genetics are identical, a clone will give you a plant with the same characteristics as the mother, such as flavor, cannabinoid profile, yield, grow time, etc. So if you come across a specific strain or phenotype you really like, you might want to clone it to reproduce more buds that have the same effects and characteristics.
With cloning, you don’t have to get new seeds every time you want to grow another plant—you just take a cutting of the old plant—and you don’t have to germinate seeds or sex them out and get rid of the males.
One drawback of clones is they need to be taken during the vegetative stage of a plant—flower is too late—so if you have a small setup with only one light, it can be hard to keep clones alive while flowering other plants, because the two need different amounts of light.
Another drawback to clones is they can take on negative traits from the mother plant as well. If the mother has a disease, attracts pests, or grows weak branches, its clones will probably have the same issues.
Additionally, every long-time grower will tell you that clones degrade over time.
What are feminized cannabis seeds?
Feminized cannabis seeds will produce only female plants for getting buds, so there is no need to remove males or worry about female plants getting pollinated. Feminized seeds are produced by causing the monoecious condition in a female cannabis plant—the resulting seeds are nearly identical to the self-pollinated female parent, as only one set of genes is present.
This is sometimes referred to as “cloning by seed” and will not produce any male plants. This is achieved through several methods:
- By spraying the plant with a solution of colloidal silver, a liquid containing tiny particles of silver
- Through a method known as rodelization, in which a female plant pushed past maturity can pollinate another female
- Spraying seeds with gibberellic acid, a hormone that triggers germination (this is much less common)
Most experienced or commercial growers will not use feminized seeds because they only contain one set of genes, and these should never be used for breeding purposes. However, a lot of beginning growers start with feminized seeds because they eliminate the worry of having to deal with male plants.
Top feminized cannabis strain families
A lot of classic weed strains that have been around for a while come in feminized form. Some popular fem seeds are:
- OG Kush
- GSC (Cookies)
What are autoflowering cannabis seeds?
Autoflowering seeds are also popular with beginning growers. They are easy to grow because you don’t have to worry about light cycles and how much light a plant receives.
Most cannabis plants begin flowering when the amount of light they receive on a daily basis reduces. Outdoors, this happens when the sun starts setting earlier in the day as the season turns from summer to autumn. Indoor growers can control when a plant flowers by reducing the daily amount of light plants receive from 18 hours to 12 hours.
However, a type of cannabis called Cannabis ruderalis, which developed in extreme northern conditions without much sunlight, will begin flowering once the plant reaches a certain age—they automatically start flowering regardless of the amount of light they receive, hence the name “autoflower.”
Pros and cons of growing autoflower
Because they grow and flower quicker, growers can fit in multiple autoflower cannabis harvests into the span of one regular harvest.
Autoflowers can be started in early spring and will flower during the longest days of summer, taking advantage of high quality light to get bigger yields. Or, if you get a late start in the growing season, you can start autoflowers in May or June and harvest in the fall.
Also, autoflower plants are small—perfect for closet grows or any small grow, or growing outdoors where you don’t want your neighbors to see what you’re up to.
A couple big drawbacks, though: Autoflower strains are known for being less potent. Also, because they are small in stature, they usually don’t produce big yields.
However, potency in autoflowering varieties has increased significantly since their initial introduction, with some breeders crossbreeding the low-THC ruderalis with other more potent varieties.
Tips for growing autoflower marijuana seeds
Autoflowering strains require some preparation, as they will grow quickly and start to flower whether or not you’re ready for them.
Many marijuana growers start autoflowers early in the season, and at a different time than a regular crop, so keep the season and climate in mind when growing and harvesting—your plants still need warmth to grow, and rain can give them bud rot. Consider growing in a greenhouse to protect them.
Because training happens during vegetative growth, for autoflowering plants, this period could be as short as a few weeks, which means time is limited. Try topping your autoflowers after they have three nodes, and stop once they begin to flower. You will want to prune them lightly.
Go easy on nutrients
Autoflowers don’t need lots of nutrients because they’re small and don’t spend much time in the vegetative cycle. They won’t need as much veg nutrients—such as nitrogen—but will need more bloom nutrients.
What are high-CBD cannabis seeds?
CBD, or cannabidiol, is one of the chemical components—known collectively as cannabinoids—found in the cannabis plant. Over the years, humans have selected plants for high-THC content, making cannabis with high levels of CBD rare. The genetic pathways through which THC is synthesized by the plant are different than those for CBD production.
Cannabis used for hemp production has been selected for other traits, including a low THC content, so as to comply with the 2018 Farm Bill. Consequently, many varieties of hemp produce significant quantities of CBD.
As interest in CBD as a medicine has grown, many breeders have crossed high-CBD hemp with cannabis. These strains have little or no THC, 1:1 ratios of THC and CBD, or some have a high-THC content along with significant amounts of CBD (3% or more).
Seeds for these varieties are now widely available online and through dispensaries. It should be noted, however, that any plant grown from these seeds is not guaranteed to produce high levels of CBD, as it takes many years to create a seed line that produces consistent results. A grower looking to produce cannabis with a certain THC to CBD ratio will need to grow from a tested and proven clone or seed.
How to germinate marijuana seeds
Germination is the process in which a seed sprouts and begins to grow into a new plant. Also referred to as “popping,” germination is the very first step in starting your weed grow.
Marijuana seeds can be acquired from an array of sources and can vary in quality. For more info on how to buy marijuana seeds, check out our Guide to buying cannabis seeds.
Cannabis seeds require three things to germinate: water, heat, and air. There are many methods to germinate seeds, but for the most common and simplest method, you will need:
- Two clean plates
- Four paper towels
- Distilled water
Take four sheets of paper towels and soak them with distilled water. The towels should be soaked but shouldn’t have excess water running off.
Take two of the paper towels and place them on a plate. Then, place the marijuana seeds at least an inch apart from each other and cover them with the remaining two water-soaked paper towels.
To create a dark, protected space, take another plate and flip it over to cover the seeds, like a dome.
Make sure the area the seeds are in is warm, somewhere between 70-85°F.
After completing these steps, it’s time to wait. Check the paper towels once a day to make sure they’re still saturated, and if they are losing moisture, apply more water to keep the seeds happy.
Some seeds germinate very rapidly while others can take a while, but generally, seeds should germinate in 3-10 days. If it’s been two weeks and a seed hasn’t sprouted, it’s probably a dud and won’t sprout.
A seed has germinated once the seed splits and a single sprout appears. The sprout is the taproot, which will become the main stem of the plant, and seeing it is a sign of successful germination.
It’s important to keep the delicate seed sterile, so don’t touch the seed or taproot as it begins to split.
Transplanting germinated cannabis seeds
Once you see the taproot, it’s time to transfer your germinated seed into its growing medium, such as soil.
- Fill a 4-inch or one-gallon pot with loose, airy potting soil
- Water the soil before you put the seed in; it should be wet but not drenched
- Poke a hole in the soil with a pen or pencil—the rule of thumb is: make the hole twice as deep as the seed is wide
- Using a pair of tweezers, gently place the seed in the hole with the taproot facing down
- Lightly cover it with soil
Keep a close eye on the temperature and moisture level of the soil to keep the seed happy. It’s very delicate at this stage. Use a spray bottle to water it—over-watering can suffocate and kill the delicate sprout.
Within a week or so you should see a seedling begin to grow from the soil.
Germinating cannabis seeds doesn’t always go as planned. Some seeds will be duds. Others will be slow and take longer to sprout. But some will pop quickly and grow rapidly.
This is the beauty of seeds—often, you can tell which plants or genetics will thrive right from the get-go. This will help you determine which plants you want to take cuttings from for clones or for breeding if you want to create a seed bank of your own.
How to sex a pot plant
Check out Johanna’s full video series on how to grow weed on Leafly’s YouTube .
As we’ve mentioned, cannabis is a dioecious plant, meaning male and female reproductive organs appear on different plants.
Because only female cannabis plants produce buds and you want them to focus all their energy on producing buds and not seeds, it’s important to identify and get rid of male weed plants so they don’t pollinate females. If females are pollinated, it will give you buds filled with seeds, making your weed harsh and unpleasant.
Cultivating males is important for breeders trying to cross new strains and genetics, but most people growing for buds will want to remove the males.
As mentioned above, you can skip the processing of sexing weed plants by growing with feminized seeds or clones.
If growing male and female cannabis seeds, they’ll start to show their sex organs, or “pre-flowers,” after 8-10 weeks from germination.
Cannabis plant sex organs appear on nodes, the points where branches grow off from the main stalk.
Males will have round balls—these will develop into pollen sacs, which will release pollen into the air when mature.
Females will have a round structure with long hairs—these hairs will develop into pistils, which will catch pollen in the air.
Pre-flowers can initially be extremely small and hard to identify with the naked eye, but you can use a magnifying glass to get a better look.
Can I grow a seed I found in a bag of weed?
Finding a cannabis seed in your stash is not ideal, but we’ve all been there before. Although much less common than it once was, it still happens. Sometimes you’ll notice one when grinding down some flower, or you’ll see one pop, spark, and crackle from the heat of a lit bowl.
These are referred to as “bagseeds” and whether or not you can grow one will depend on where it came from.
Is a bagseed good or bad?
Seeds found in finished cannabis buds can develop for a number of reasons. For example, a male plant may have accidentally pollinated a flowering female during the growing process. But more commonly, they’re a sign of stress and can be attributed to high temperatures during the final stages of flowering or an exaggerated spike in climate or environment.
Seeds can also form in plants with genetic disorders or instability, like hermaphrodites—plants that develop both male and female reproductive parts. Generally, stress and genetic disorders are viewed as bad, so temper expectations with any plant you start from a bagseed.
But sometimes you get lucky and find a mature seed in some really nice herb. Strains like the legendary Chemdog wouldn’t be possible without adventurous smokers planting and proliferating the seeds they found in a bag of kind bud.
So don’t discount bud because it has a seed or two in it. While not ideal, it could be the origins of the next great weed strain.
Ask yourself a few questions to decide if it’s worth the time and energy to grow the seed.
Was the seed found in good weed?
If you don’t like the flavor, effects, or even the look of the bud, then it’s probably not worth growing.
Are you ready to grow?
Growing marijuana takes a certain level of commitment: time, energy, and financial resources, so be sure you can commit to the whole process.
Is the seed viable?
For a seed to be viable, it must be mature enough to have a completely formed genetic blueprint, and it must be strong enough to germinate and pop through its hard casing and sprout its crucial taproot.
There are a few indicators that will give you a sense of whether the seed is worth germinating.
- Tiger stripes—dark stripes on the seed which resemble veins on a leaf are generally good
- Solid shell—a seed should be able to withstand a little pressure when pinched between your fingers; if it crumbles or cracks, it’s no good
Immature seeds tend to be light in color and have a soft outer shell.
In some cases, even if a seed isn’t completely mature, there’s still a chance it could be viable. But often these are extremely weak, take long to develop, and express other unfavorable characteristics. Growers usually discard weak plants to free up space.
You might also find a mature seed that has been physically damaged through poor handling, like rough trimming. In those cases, it probably isn’t worth the effort to try and germinate the seed.
But if the seed you found looks decent, you might as well germinate it and see what sprouts.
Time to germinate
Viable or not, there’s only one sure way to find out if a bagseed will grow. If you’re simply curious to learn and not as concerned with the overall outcome, you can plant a couple of bagseeds outside and see what happens.
If you’re ready for a more serious approach, make sure you have the space for a proper garden and pop the seeds to see what fruit they bear.
Even if your seed sprouts fast and grows vigorously, it still has roughly a 50/50 chance of being female and producing buds, instead of turning out to be a male.
Remember, once a seed germinates, the real work begins. Sexing, selecting, vegetative growth, flowering, and the eventual harvest all lie ahead.
How to buy cannabis seeds
Cannabis seeds can be found on numerous online seed banks, but note that it is illegal to bring seeds into the US and Customs will seize any cannabis seeds that they find in packages or on a person. In legal and medical states, you may purchase seeds at a dispensary.
Will Hyde and Trevor Hennings contributed to this article.
Want to grow weed from seeds? Learn how weed seeds work, how to sex marijuana plants, and how to properly germinate your cannabis seeds.
Do Hemp Seeds Have CBD?
In a still new market, the cannabis niche already seems a bit…overcrowded. After all, there are hemp seeds, hemp seed oil, broad spectrum hemp oil — it’s enough to make anyone’s head spin! Well, swivel your dome back the way you found it. We’re here to set your head right!
Don’t let hemp products overwhelm you. They are all beneficial (and delicious). However, each type of hemp product does react with the body in its own unique way. Therefore, some products like hemp seeds and hemp seed oil may not have all the nutrients you are looking for. Let’s take a look at the differences between the major hemp products and get to the bottom of the question, “Do hemp seeds have CBD?”
Getting to Know the Hemp Plant
Before getting into the nuances of hemp products, let’s get to know the plant in the first place. Hemp is a member of the Cannabis sativa genus and comes with a hoard of unique properties. One of those is that it doesn’t contain the psychoactive molecules that its cousin, marijuana, does.
Hemp plants are chock full of terpenes. These are the aromatic chemical compounds that give Cannabis sativa plants their distinct smell. All plants scents’ have evolved from genetic structures known as terpenes. Terpenes are not only responsible for the scent of a plant, but they include wellness-promoting benefits as well.
What sets Cannabis sativa apart from other plants is that this genus contains at least 120 unique phytocannabinoids. Of all of these distinct phytochemicals, there are two that are most prominent in cannabis plants. Those chemical compounds are tetrahydrocannabinol (THC) and cannabidiol (CBD).
THC is most common in marijuana. It’s the psychoactive element of the plant and is the number one reason why cannabis was outlawed. However, hemp contains only small traces of THC. The hemp version of Cannabis sativa is often cultivated to produce an abundance of CBD instead. This is the component that has sparked the healing cannabis movement.
To be legally sold in the United States, hemp products must contain less than 0.3% THC. With such low amounts of THC, it is safe to presume that hemp can’t get you high.
Where Does Hemp Come From?
Hemp comes from central Asia, which still remains one of the main cultivation places. It quickly spread across the world, starting with Europe and then moving to the Americas and Australia. It’s a plant that grows very fast and has many different uses and purposes, which makes it easy to produce and very versatile.
When people ask about the products they buy, they often ask about where the hemp comes from and we are proud to say that Joy Organics uses American hemp.
Where Does CBD Grow?
The way CBD comes to fruition is through the miracle of life. When a seed gets planted, it soaks up all the water and nutrition from the soil. From there, light beams down onto the ground. During the germination period, the light excites microorganisms in the soil, including the seed. As moisture is pulled up to the sky through evaporation, it creates pressure on the seed. Thus, the hemp plant begins to blossom.
While the plant grows toward the light, it’s drawing up as much moisture and nutrients as it can through its roots. This creates a push-and-pull effect on the plant itself. A tug-of-war is created because the plant’s roots are firmly entrenched in its grow medium.
Rays from the light above cause evaporation. Light draws water from the stems and leaves up into the atmosphere. Being anchored by roots while being tugged by light causes stress on the hemp plant. Think of any time we stretch ourselves at the gym. What happens? We sweat.
While our sweat is nothing to write home about, the resin excreting from the tiny hairs on the hemp leaves contain phytocannabinoids. So, to extract CBD oil, you must apply pressure on the leaves and stems of the hemp plant. When this happens, trichomes burst open, exposing oil rich with rare phytochemicals.
Do Hemp Seeds Have CBD?
We can confirm that CBD lives in the leaves and flowers of the hemp plant. Unfortunately, there isn’t any CBD in seeds.
If you purchase hemp seeds or hemp seed oil, you will not get any benefits of CBD. To get the full benefits, you want to get CBD products that tout they are “broad or full spectrum hemp oil.”
This means most of the plant is used in the process. Seeing as each part of the plant brings a different set of phytochemicals to the table, Joy Organics figured we’d have it all! The only thing we opt out of is THC.
As some hemp may have traces of THC, we remove it from the final formula so that you have all the benefits of unique phytocannabinoids without the worry of THC. In fact, third-party labs have found 0.0% levels of THC in our products.
Benefits of Hemp Seeds
Seeds are the unsung hero in nutrition. Chia seeds are a great energy booster and make a killer pudding. Sunflower seeds are full of protein and awesome to enjoy at ball games. Then there are hemp seeds.
Much like the plant itself, hemp seeds contain a litany of unique phytochemicals that makes this a heart-healthy food choice. For one, over 25% of the calories in a tiny hemp seed comes from high-quality protein sources. In fact, just 30 grams of seeds contains 9.47 grams of protein!
What makes this such a heart-healthy food is the fact that get you so much protein, and it comes with dietary fiber. Main protein sources, such as animal fats, contain a ton of LDL cholesterol and little fiber to flush it out. Not to mention, these animal fats are filling. Therefore, we aren’t getting an adequate amount of greens to help push some of these toxins out of the system.
Consuming high-caloric fats makes it harder for your body to digest foods. As a result, they build up in your system, causing a backlog of blood flow. Naturally, your heart gets fewer supplies of oxygenated red blood cells, which may lead to a myriad of heart conditions.
By eating a protein-rich, fiber-dense product like hemp seeds, you are helping clear out the clogged up system. Not to mention, they’re easier for your body to break down and as a result, disperse the nutrients into the bloodstream.
Another leg-up hemp seeds have as a source of protein are their abundance of omega-3 fatty acids. Rule of thumb, we should have a ratio of 3:1 when comparing omega-3s to omega-6s. Unfortunately, evolution has seen a 1:1 ratio become the norm. Alarmingly enough, studies say today, many hover at “20:1 or higher.”
These statistics correlate with the fact that one-third of the population is considered overweight. It all makes sense. Not eating your phytochemicals because you’re full from animals fats will cause your system to clog up. Hemp seeds are a great way to find that balance and help fight off some excess weight gain.
How to Use Hemp Seeds
Seeds are a diverse tool in the kitchen. You can use them in a number of ways. Hemp seeds are no different. The most common way to consume hemp seeds is like any other nut — you can consume them raw by the handful. Personally, we think their nutty flavor can accentuate any salad in need of some crunch!
Otherwise, you can roast hemp seed to sprinkle over a delicious butternut squash soup. Toast them on the stovetop and sprinkle them in with some breadcrumbs to bake over chicken. Or mill the seeds and toss them into a batter for a healthier baked good. To get more creative, you can even soak hemp seeds in water to formulate hemp seed milk.
For those looking to use hemp seed oil, this liquid contains many of the same nutritious benefits as the seeds. Seeing as hemp seed oil is extracted from CBD-free seeds, these oils don’t contain any cannabinoids. Don’t let this deter you from using the delicious health accessory in your next dish.
Like the seed itself, hemp seed oil has a nutty flavor that works wonderfully in bulletproof coffees. It’s like having a hazelnut syrup without all the additives! Being a complete protein, you can actually swap MCT oil for the cheaper alternative in hemp seed oil!
While we wouldn’t suggest cooking with hemp seed oil, it does work wonderfully as a dressing. Mix up this earthy flavor with some citrusy nodes like a white orange balsamic vinegar. It will have your taste buds dancing and your micronutrient intake booming!
Storing Hemp Products
Whether you opt for hemp seed, hemp seed oil, or broad or full spectrum hemp oil, store them all the same! You want to keep hemp and CBD products in a cool, dry and dark place. In fact, many hemp seed oils recommend you keep them in the refrigerator.
By keeping the products away from light, it allows their chemical compounds to maintain integrity. Otherwise, rays within the light will excite the phytochemicals and cause them to oxidize. Sounds familiar? It’s the circle of life, indeed.
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Hannah Smith is Joy Organics Director of Communications. She is driven by her passion for providing clear and accessible wellness and CBD education. In 2015, she received her BA in Media, Culture and the Arts from The King’s College in New York City and before Joy Organics, worked as writer and photographer in the Middle East and North Africa. Her work has been featured on Forbes, Vice, Vox, Denver Post, and the Coloradoan.
Hemp seeds have many benefits. They are the unsung hero in nutrition. Heart-healthy, high in protein and dietary fiber …. but, do hemp seeds have CBD?