Keep Cannabis Seeds

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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… When it comes to growing your own cannabis, there’s a lot to learn. You’ll pick up most of the information as you go. One of the most common questions for… Handy dos and don’ts for storing cannabis seeds. Following these tips should keep their germination rate unchanged for at least two years. Read more!

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.

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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.

Author

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 Long Do Cannabis Seeds Last?

When it comes to growing your own cannabis, there’s a lot to learn. You’ll pick up most of the information as you go. One of the most common questions for growers is “how long do cannabis seeds last?” The answer is not always clear.

Cannabis seeds will last longer if they’re stored properly out of harm’s way. If you don’t know the best way to store your seeds, read on. We’ll answer “how long do cannabis seeds last” and give you some tips for getting the most out of your seeds.

Keep in mind that there is no concrete answer for how long cannabis seeds will last. In fact, the only guarantee is that it depends on many things. Storage, the specific strain, and other factors will affect the lifespan of your seeds.

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Marijuana seeds last the longest in the refrigerator

As with many things related to growing cannabis, there is some debate about the best ways to store seeds. There is also plenty of debate surrounding how long they will last in any given storage space.

Leafly says that seeds must be properly stored to prevent mold or pathogens from spoiling them. They should be stored in a cool, dark place and can be used within 16 months. If you’ll be waiting longer than 16 months, it’s best to put them in the freezer to use in the future.

However, some suggest that seeds can last for years when stored in a cool, dark place. Like we said, there is plenty of debate surrounding best practices for growing weed. If you have stored your seeds in a cool, dark place for a long time, examine them thoroughly and be cautious. Expect to lose more seeds as time goes on, though. The longer they sit in storage, the more likely it is that some won’t germinate.

So, to be on the safe side, it’s best to refrigerate or freeze your seeds for long-term storage.

If they’re not stored in a cool, dark place, and are instead stored in regular conditions, they will last significantly less time. Some sources suggest they will only last a few months in regular conditions. If you don’t plan to use your seeds in the near future, it’s best to store them somewhere cool and dark to prevent pathogens and mold.

As a general rule, try to use your cannabis seeds within the first three years of obtaining them. Five years is considered very old for seeds. The quicker you can germinate and use your seeds, the better. In fact, the longer you wait, the less likely it is that the seeds will germinate at all.

What factors affect cannabis seed longevity?

First of all, try to keep your seeds in their original packaging if possible. This will prevent them from being exposed to light or other no-nos. If they’re already out of the packaging, that’s okay. Keep them in a sealed container, in a dark, cool place. Or sealed in the refrigerator or freezer.

It’s not necessary to freeze your seeds, but some people prefer to freeze them instead of refrigerate them. If you don’t open your freezer as often as you open your fridge, it may be logical to freeze them instead. This will prevent frequent temperature changes and potential light exposure.

Additionally, too much or too little humidity and the presence of oxygen can also affect the longevity of your seeds. Keep ‘em cool. Keep ‘em dark.

And don’t forget genetics and quality. Some seeds will just fare better than others because they are higher quality and more durable.

What happens when cannabis seeds are stored improperly?

If seeds are exposed to light or rapid temperature change, this can trigger a number of events that will damage their longevity.

First, it can trigger them to use up their nutrient stores before they should be used. This means when it’s time to germinate, they won’t have enough nutrients. Exposure to high humidity can trigger fungi growth.

Here’s some more information about how humidity can affect cannabis seeds, courtesy of Royal Queen Seeds.

If the storage space has an 8-9% level of humidity, it may eventually attract pests and insects. Once it hits 12-14% humidity, it’s possible for fungi to grow inside and outside of your seeds.

When humidity levels reach higher levels, around 18-20% humidity, the seeds will begin to sweat. Once you’ve reached 20-30% humidity, it’s a good idea to store your seeds. Around 40-60% humidity will lead to germination. You don’t want this if you’re not using your seeds yet. And finally, 80-100% humidity will cause seeds to drown and wilt in less than a day.

Best practices for storing your cannabis seeds

If you don’t plan to wait a long time, you can store your seeds in a cool, dark place. However, if you want to be extra certain they will survive, refrigerate or freeze them.

When you refrigerate or freeze your seeds, you need to protect them from your regular use. You don’t want your seeds getting exposed to light and temperature changes on a regular basis because they’re in your fridge. So, store them in the device you use less often (or better, a second fridge you rarely use) to prevent frequent temperature changes.

The best way to store them in a refrigerator or freezer to keep them in a nice, airtight container. Ziplock bags are a good choice because you can squeeze most of the air out and create a tight seal over your seeds. But don’t stop at the bags. Once you’ve sealed them in a ziplock bag, you’ll need to put it inside a darker bag or container. This will prevent deterioration from light every time you use your fridge.

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It is possible to expose your seeds to excess moisture if they’re improperly stored in the refrigerator or freezer. If you don’t plan to leave them for long, you can skip the fridge and store them in a dark, cool zone. But if you do use the refrigerator to store cannabis seeds and want to make sure they don’t get too much moisture, you could add a little bit of uncooked rice to their container. Some growers suggest this will absorb excess moisture and prevent the seeds from deteriorating.

Final thoughts

As with many things cannabis and gardening, different people like to use different methods. What works for you may not be someone else’s cup of tea.

But when it comes to storing seeds, you need to be careful. It’s crucial to keep them in an environment that prevents them from getting damaged and losing their ability to germinate.

The best way to store your seeds will depend on many factors. Assess how long you plan to leave them for, the quality of the seeds, and the storage spaces you have available before deciding how to store them. And good luck!

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Storing Cannabis Seeds – Some Handy Dos and Don’ts

Keeping your cannabis seeds safe and viable is essential. To help you get the most out of your “magic beans”, here are some handy dos and don’ts for correctly storing cannabis seeds.

1. DO – keep your cannabis seeds dry.

Damp or wet seeds will begin to germinate, and even small amounts of moisture or humidity inside packaging can cause rot and mould.

2. DON’T – let them get too warm.

Warmth will also encourage germination, and high temperatures can damage cannabis seeds, effectively ‘cooking’ the insides.

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3. DO – keep them in the dark.

Darkness encourages seeds to remain dormant; long exposure to light may damage and degrade the health of the seeds.

4. DON’T – squash them!

Pretty obvious really, but make sure the shells remain intact. The shell is the seed’s natural defence against outside elements.

5. DO – keep them labelled.

Cannabis seeds do tend to all look very similar; make sure your strains don’t get mixed up!

6. DON’T – let them get too cold.

Freezing cannabis seeds will damage at least some of them. The door of a fridge is the ideal temperature (5 – 6 degrees centigrade).

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7. DO – keep your hands, working area and any equipment clean and dry.

Mould and fungus can grow on seeds even when they are refrigerated.

8. DON’T – let pests or rodents get to your cannabis seeds.

Keeping them in the fridge is a good way of ensuring this also.

9. DO – make sure you buy cannabis seeds from a reputable seed bank, such as Sensi Seeds or White Label Seed Company.

Seeds should arrive in the original packaging and be clean and solid.

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10. DON’T – pack your cannabis seeds with NON-FOOD GRADE silica gel.

Or anything else that could be toxic!

Following these handy tips for storing cannabis seeds should keep the original germination rate (which, if you bought seeds from a reliable seed company, should be around 95%) unchanged for at least two years, and potentially as many as five! After some years, the germination rate will gradually decline. However, thanks to the naturally stubborn survival traits of cannabis, there is no deadline at which all the cannabis seeds in a batch will suddenly lose the ability to germinate. Anecdotal reports of cannabis seeds that were over 20 years old when they were germinated and still produced a 60% germination rate can be found on various cannabis forums, so with correct storage, your precious seeds will remain an investment for years to come!

Laws and regulations regarding cannabis cultivation differ from country to country. Sensi Seeds therefore strongly advises you to check your local laws and regulations. Do not act in conflict with the law.

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