Cannabis seeds are a product that we must keep in the best condition possible to prevent them from suffering the slightest damage. As a living organism, we must follow… Storing cannabis seeds under the right conditions lets you keep your favourite strains for a long time. However, doing this incorrectly can lead to a Knowing how to store cannabis seeds is important if you want to keep your seeds over long periods of time – how long do marijuana seeds last?
How to Keep Cannabis Seeds in Perfect Condition
They are where it all begins. The care you give your cannabis seeds will determine not only how your plants grow, but also the final results of your harvest. As we are dealing with a natural product that needs to develop, the conditions under which it is stored will have an impact on their subsequent yield. Thus, though marijuana seeds are quite robust and autonomous, if you want to avoid unwanted setbacks when you plant them, you should take steps immediately after obtaining them.
Storage temperature: 6° C / Germination temperature: 24° C
Note these two temperature limits to calibrate the range in which you operate. Keep in mind that the ideal temperature to store seeds is around 6 to 8° C. Hence, the most expert growers have a refrigerator just for this purpose, with low temperatures being constantly maintained. The same is true with regards to humidity: if you do not want your seeds to suffer any damage it is advisable to keep them in places with a relative humidity of around 20-30%.
To keep your seeds in a cool place you’ll only have to make some space for them in your refrigerator at home (if it is a no-frost model, and in the fruits and vegetables crisper, even better), though ensuring that it is dry enough for their proper preservation will be a bit more complicated.
Humidity control via micro conservation in Eppendorf tubes
To keep humidity low, it is ideal to have some sealable containers on hand. To do this, a highly recommended option is to use Eppendorf tubes, a standard piece of laboratory equipment used for the preservation of liquid samples, and the very ones in which we provide our customers with our seeds.
These are small cylindrical containers with conical bottoms, made of polypropylene, and with hermetic seals. With this method of micro conservation the containers full of seeds are protected individually, in such a way that, even if there are variations in the outside atmosphere, inside the container the humidity conditions are constant.
To ensure this we place small pearls of silica gel inside the tubes so that, even if the outdoor humidity rises, or the temperature varies, we can be confident that the air is completely dry inside. The cap of the Eppendorf guarantees that no humidity gets in, but the silica gel also ensures that, if any were to penetrate it by accident, it would be immediately absorbed by this material.
If you do not have any of these containers, you can always use some opaque and airtight plastic bottles, which will also do the trick. Inside, along with seeds, it is a good idea to place some dry rice or silica crystals, separated from them by means of a cotton ball or paper. These elements will absorb moisture from the atmosphere, which, depending on one’s location, can be around 25% or higher.
Run from the light
You must not forget that light is another of the factors that directly impact seed germination. Therefore, you must be sure that you prevent light from shining on the seeds that you will later be planting. If exposed to light, they can lose much of their germinative power. This is why at Dinafem we place our Eppendorf tubes in opaque metal boxes, which protect the seeds from light and any possible crushing or breakage during their transportation or handling.
If you follow these guidelines you can preserve your seeds for several years. In fact, there are experts who contend that, if storage conditions are ideal, there are seeds that will last for up to a decade.
Labelling the different strains, essential to differentiate between them
It may seem obvious, without a doubt, but don’t forget to label the different strains you have. Once you store the seeds in their containers you should only open them to plant them. It is not advisable to open and close the container you are using, as the protection your seeds are provided is immediately lost once it is opened, and fluctuations in temperature and humidity can be highly detrimental.
Labelling the strains you have is even more vital if you cannot see the seeds. This can be the case if, for example, you follow the advice of some growers, who instruct more inexperienced growers to store their seeds in analogue film tubes. In cases like this you can simply stick a small label on it and jot down with a pencil the name of the strain in each tube, which should be placed, in turn, inside a piece of Tupperware to prevent its contents from deteriorating.
Other tips for storage
If you do not plan to store your seeds for a long time, but rather intend to plant them and harvest them as soon as possible, perhaps it will not be necessary to steal space from your fruits and vegetables in your refrigerator. Some recommended storing seeds in a closet located in a dark part of the house, where the natural light of day does not affect them too much, and so that they are kept dry and, more or less, cool. This location can be a good choice as long as you are going to plant your seeds soon.
Whether you choose to store your seeds in a refrigerator designed exclusively for their maintenance, or in a dark corner of your house, you will have to pay attention to other risks that can end up damaging them. Many experienced growers stress that seeds must be dried correctly and left under proper humidity conditions to prevent mould from appearing inside the receptacles. To keep this from occurring, in addition to drying the seeds properly, it is a good idea to always use silica gel when storing them.
Some potential hazards
Another threat that can ruin all your efforts are insects. Just one in your container is enough to render all the seeds inside useless. To prevent this it is advisable to spread diatomaceous earth where you store them. D.E. is a kind of sand with a fossilised algae base. It is inert and non-toxic, and functions as an invaluable natural insecticide. If you keep your seeds in your fridge with other foods, this will not be a good place to use this type of substrate. However, if you have a refrigerator just for this purpose, or a simple closet, you will be able to use this trick.
If a container you are using is left open, and a rodent somehow gets into your house, the consequences can be dramatic, both for you and your harvest, of course, because the animal will enjoy a great feast at your expense. This is why, among other things, something as simple as placing your containers up high can be a good way to prevent such disasters.
There are many factors to keep in mind when it comes to storing cannabis seeds. Keeping an eye on the temperature, light and humidity is vital, as they can affect your seeds’ germination capacity; if they normally germinate within 48 to 72 hours, when stored under poor conditions it can take up to 6 to 7 days. Or never. But this is not enough. You must also protect them from other external agents that, without your knowledge, can end up ruining your next harvest, or one you had planned for a later date.
D. Civantos Professional journalist and blogger, I’ve, for more than a decade, been the head of Nexo Contenidos, a company specialized in the cannabis world and in wide-ranging digital media. You can find me not only on Dinafem, but also on Strambotic, Cooking Ideas and many other blogs floating in the uncharted waters of the net. However, when I feel most at ease is working with cannabis, one of my biggest passions from a very young age that has now become the main focus of my work.
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How to store marijuana seeds
Storing cannabis seeds under the right conditions lets you keep your favourite strains for a long time. However, doing this incorrectly can lead to a series of issues that end in the same result: the seeds won’t germinate. Here we analyse exactly what you need to do to keep your marijuana seeds in good condition, thereby making sure that they germinate successfully even several years later.
In order to store your marijuana seeds for a long time, it’s important to remember that they are technically classified as living organisms, because they have an embryo that is capable of germinating and becoming a new plant. And, like every living organism, your seeds can die if you don’t look after them properly.
Even though they’re quite hardy, if you don’t provide them with the suitable conditions for their correct conservation, their viability will rapidly decrease. Whilst its typical for them to germinate within 48 to 72 hours, they can take as long as 6 to 7 days if they’re stored badly. Or at worst they might not even germinate at all.
There are several factors to take into consideration that can reduce the germination rate of marijuana seeds: light, heat, humidity, and oxygen levels. As a general rule though, the most important factor to keep your seeds viable for as long as possible is to avoid fluctuations in the environmental conditions.
How to store marijuana seeds?
These are the key parameters to correctly store your cannabis seeds for the maximum time possible:
1- Exposure to light
The shell plays a part in protecting the seed’s embryonic tissue from the light, which in turn helps the seed remain dormant. In nature, cannabis seeds normally fall from the plant in autumn and remain under a light layer of soil until they germinate the following spring. Therefore, they haven’t evolved to face bright light, which may trigger the chemical processes needed for germination. Storing your cannabis seeds in a dark, opaque container is a great way of keeping top germination rates for the future.
2- Humidity level
High relative humidity levels are required for the germination of cannabis seeds. Therefore, it makes sense to keep them under low humidity conditions when they’re being stored. If you’re only storing the seeds for a short time (no more than a few months), a relative humidity level between 20% and 30% will be fine. If, however, you’re going to store them for longer, then keep the humidity level between 8-10%.
A good way of making sure that the seeds remain dry is to include a desiccant in the container where they’re being stored (i.e. one of those little silica gel packs that are often included with different products). These packs also absorb any excess of ethylene that may have been generated as the seeds get older and that could also stimulate germination if not removed. You can even use a few grains of rice if you don’t have any silica packs available.
3- Temperature fluctuations
When it comes to storing cannabis seeds, the cooler the better. But only to a certain point. At low temperatures, the life of cannabis seeds is significantly prolonged because the cold temperature slows down cellular biochemistry and so the plant’s delicate living tissue can survive for much longer periods. Another option is to freeze the seeds to keep them for the long term; but if this process is not carried out properly, they can eventually get damaged.
So the ideal storage temperature ranges between 4° and 8°C. You can still store seeds at higher temperatures, but their lifespan will be reduced. Many growers stick to temperatures around 4°C. However, this still isn’t a magical number.
4- Oxygen level
Although this isn’t such a determining factor, a constant supply of fresh oxygen can lead to premature germination. To prevent this, keep your seeds in a bag or airtight container, ideally vacuum sealed, although as long as the container is tightly closed that should be enough.
What’s the best way to store cannabis seeds?
There are different options depending on how long you’re intending to keep the seeds. According to the requirements mentioned above, it’s best to keep them in a dark, cool, and dry place. These are the basic conditions you can find in a standard cooler or fridge (ideally ‘no frost’ so they’re protected from the damage that frost may cause). A piece of warning here: you can’t be opening and closing the fridge door non-stop.
This is why it’s best to have a fridge specifically dedicated to seed storage. Or at least a small cooler that you rarely open; because every time you do this, the inside experiences rather significant fluctuations in temperature and humidity levels.
If you don’t have another choice, at least place the seeds towards the back of the fridge, or, even better, in one of the fruit and veg drawers, where they’re more protected from these changes. If you place some desiccant in the container with the seeds, you’ll also be protecting them from any changes in humidity.
In case you don’t have a cooler at hand, you can always store your seeds in a cool basement. Even a normal room can work well: a seed pack stored in an airtight container in a drawer or cupboard in a dark area of the house should also offer good germination rates. But do avoid storing your seeds in bright light or in hot areas (such as a windowsill or your grow room).
If you normally germinate your cannabis seeds a few weeks or months after purchasing them, you don’t need to be so strict with how you store them. You’ll be fine as long as you keep them in a cool place, away from the light, and in their original packaging (which is already optimised for their protection); and, of course, follow your common sense regarding these storage rules. If you open a packet of seeds but you don’t sow all of them, keep the remaining seeds in an airtight container.
How long can you keep marijuana seeds?
Generally speaking, always look for proven quality seeds like the ones we offer you in our Kannabia catalogue: if you provide them with all the ideal conditions that have been described, you can keep your seeds for as long as 5 years after they’ve been produced. In addition, if you maintain decent storage conditions over time (i.e. without significant fluctuations in the environmental parameters), you can expect your seeds to still be good after one or two years.
Naturally, the longer you keep your marijuana seeds, the lower the chances of a successful germination. Storing them incorrectly also reduces the possibilities of success. So store them properly, as we have described in this article, and use them as quickly as you can, to ensure the highest possible germination rate.
Kannabia Seeds Company sells to its customers a product collection, a souvenir. We cannot and we shall not give growing advice since our product is not intended for this purpose.
Kannabia accept no responsibility for any illegal use made by third parties of information published. The cultivation of cannabis for personal consumption is an activity subject to legal restrictions that vary from state to state. We recommend consultation of the legislation in force in your country of residence to avoid participation in any illegal activity.
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How Long do Marijuana Seeds last?
When it comes to cannabis seeds, many first time growers tend to have some sitting around from an old friend or baggie. With recent legalization, new growers are deciding to dust their seeds off and start their very own grow, but how long do marijuana seeds last before they won’t germinate?
A typical feminized cannabis plant can produce an enormous amount of seeds – hundreds, depending on how well the plant takes the pollen and how meticulous the pollination process is. It also largely depends on the strain, as some strains are capable of producing much more, especially if their flowers are larger and can hold more. But how long do they last once they’ve been harvested and dried?
How Long do Marijuana Seeds Last?
There are many different factors that come into play when it comes to cannabis seed lifespan, and the most important is conservation. If you’ve obtained your seeds from a seed bank and they come in their own packaging, when it comes to storage you can simply leave them in their packaging in a dark, dry spot; seed banks usually recommend planting within the year.
However, if you’re planning on crossing your own plants and making your own seeds, you’ll need to know how to harvest, dry and store them if you’re planning on keeping them for a while before germinating them; knowing how to store cannabis seeds properly is quite an important tidbit of information if you’re a professional cannabis grower.
The seed is undoubtedly just as important as the final result; without quality seeds, you won’t get quality results. Keep in mind that cannabis seeds are practically living beings ready to be brought fully to life. Many new growers don’t know that cannabis seeds require specific care, and the way you store your seeds can significantly affect their outcome. Check out our Cannabis seeds – Buy Marijuana Seeds section to find reliable strains.
Drying Cannabis Seeds
When working from the start you’ll first need to pollinate the flowers on a female cannabis plant and then harvest the seeds once it’s fully matured. Once you have your seeds you’ll need to dry them out before they can be stored or even germinated – they should be ready to harvest once they’ve gone a dark brown color or start showing dark stripes. Most people opt to dry their seeds by simply drying the flowers and harvesting the seeds once they’ve dried out – it makes them much easier to remove from the flowers.
How Long do Marijuana Seeds Last in Storage?
Once you have your seeds you’re going to want to store them correctly if you plan on using them down the line. In fact, when stored under perfect conditions, you can germinate 5 year old cannabis seeds successfully. Some astonishing cases have been reported of seeds lasting up to 10 years when stored optimally, although the germination times may vary wildly, taking much longer than a fresh seed. For home-growers, storing and maintaining seeds is quite important, and even more so for seed banks; a badly stored seed may not germinate, and if it does it may not grow properly. There are various parameters you’ll need to follow in order to store seeds long-term.
Seed Storage: Light
One of the first things to keep in mind is that whatever container that you store your seeds in needs to block out all light. If you’ve ever germinated cannabis seeds before, then you know that light is an important factor when it comes to the probability of the seed germinating or not. If your seeds are exposed to light for too long, they may end up too weak to germinate; even if they germinate they might have quite a hard time starting off.
Seed Storage: Temperature
The temperature at which you store your seeds is one of the most important factors. If you’re going for something short-term, you just have to make sure that they’re in an area with a stable temperature – do not store them somewhere where there are going to be temperature changes.
However, for long-term storage you’ll need to store them at around 6-8° – if you plan on storing a large amount of seeds, we recommend buying a small cooler for that specific purpose to keep them at a low, constant temperature; opening your fridge can cause temperature changes, so keeping them with the rest of your products is probably not the best idea.
Also, remember to use a blacked out container when storing in the fridge or a black bag to ensure that the lights inside don’t affect the seeds when opened.
Seed Storage: Humidity
Humidity is another incredibly important factor that can determine the success rate of your seeds. Relative humidity is essentially what causes seeds to germinate, so they’re quite delicate at this stage and you don’t want them accidentally germinating; keep relative humidity low in their container.
This obviously depends on your climate too, as there are places that have incredibly high humidity and others that are quite dry, which can directly impact how you have to store your seeds. As a general rule of thumb, we recommend keeping them in a low-humidity container, and if you live somewhere incredibly humid you might have to use specific methods to decrease humidity.
Cannabis seeds can germinate with a RH of 40-60%, and humidity higher than that can actually drown them and kill them. However, humidity ranging from 9 – 20% may also cause a myriad of issues such as insects, fungi, and even seed sweating due to excessive heat. The ideal humidity range in which to store your seeds is between 20 to 30% RH.
How Long do Marijuana Seeds Last
Taking into account the previously mentioned parameters, the best way to store your cannabis seeds for long periods of time is by vacuum sealing them and then putting them into an opaque container or bag so that no light gets to them. Keep them at a constant temperature of 6-8°. Some growers use products such as silica sachets to keep humidity down even if the outside temperature/humidity becomes drastically altered – this is a good idea if you live in more humid or hotter climates.
Keep in mind that if your seeds experience too much light or temperature changes they may end up using up their nutrient reserves, which would render them useless.