How Long do Marijuana Seeds last?
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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.
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 homegrowers, 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.
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?
What Is The Best Way To Store Cannabis Seeds?
If stored correctly, cannabis seeds can still germinate up to 5 years or more after being harvested. Growers should be careful to protect their seeds from light and oxygen, as well as fluctuations in temperature and humidity. Read on to find out how and where to store your seeds for optimal preservation.
After the hard work of germinating your seeds, it may be tempting to just toss your leftover beans in a bag for next time. However, you may be in for a rude awakening when it comes time to germinate your next batch. If stored improperly, cannabis seeds may no longer be suitable for planting.
Properly storing your seeds is crucial to ensuring the health and success of your next crop. Keep reading to find out how to properly store cannabis seeds so they last as long as possible.
Why Is Proper Cannabis Seed Storage Important?
Many growers eventually find themselves in situations where, for one reason or another, they are required to store cannabis seeds. In regions where cannabis is illegal, growers will inevitably find themselves stockpiling seeds. And even in regions where it is legal, large-scale growers typically buy seeds in bulk, making some storage necessary. By properly storing cannabis seeds, growers are looking out for the well-being of their future crops.
How Long Can Cannabis Seeds Actually Be Stored For?
Generally speaking, cannabis seeds can be safely stored for anywhere between 1–2 years, especially if they are properly stored in a cool, dark place. Depending on conditions, they can even last up to 5 years.
In theory, there is no hard limit or expiry date on cannabis seeds. When it comes to germination, the fresher the seeds, the greater your chances of success. Ideally, seeds should be planted within a few months of being harvested. However, even seeds that have been sitting around for years can still be successfully germinated. Just remember, the longer a seed has been stored, the lower its germination rate.
Additionally, seeds that have been improperly stored will require longer to germinate. While healthy seeds normally take between 48–72 hours, improperly stored ones may require as long as 5–7 days.
Factors To Consider When Storing Cannabis Seeds
Growers are usually advised to store their leftover seeds in a cool, dark, dry place. But if we’re getting down to specifics, there are actually several environmental factors that can impact the quality of your seeds.
The humidity and temperature of your storage environment are perhaps the most important factors. Cannabis seeds will absorb moisture from particularly humid environments and will dry out in particularly dry ones.
To avoid any potential damage, a relative humidity level of between 20–30% is advised. A humidity level higher than 40% may actually trigger germination, whereas levels below 8% may give any insects present the opportunity to become active and reproduce. For long-term storage, lower humidity levels of roughly 8–10% are believed to be more appropriate.
The ideal temperature for storing cannabis seeds is between 6–8℃. It is believed that the lower the temperature, the slower their vitality and ability to germinate decreases. For this reason, many large-scale growers choose to keep their seeds in a refrigerator specifically set to this temperature range. If the humidity level is appropriate, you may even be able to store them in a cool, dark corner of the fridge in your own kitchen.
Light should be avoided because it directly triggers germination. If exposed to light, seeds can lose much of their germination power later on. Many seedbanks elect to protect their seeds by placing them in opaque metal boxes.
While not as important as the other factors, restricting your seed’s access to oxygen is also a good idea. Doing so can reduce or prevent seed respiration, which, in turn, can prevent premature germination.
Not only must you provide ideal environmental conditions for your seeds, you must also maintain them. As such, it is never advisable to open your seed container for any reason other than to plant your seeds. Apart from potentially exposing them to threats such as pests and bacteria, fluctuations in temperature or humidity can also be detrimental to the health and longevity of your seeds in general.
Storage Containers And Humidity Control
Sealing your seed bags and containers is crucial to protecting your seeds from the elements. If your seeds came from a seedbank that vacuum-seals their seeds with silica packs, it may be OK to just store your leftover seeds like that (just make sure to protect them from light). However, if your seeds are scattered, and if you insist on storing them in bags, it may be a good idea to invest in a vacuum-sealer.
If you choose to store them in containers, make sure that they are truly airtight and heat-proof. Most plastic containers are not suitable as their lids are not airtight. Moreover, plastic containers provide questionable protection against water molecules and UV rays. As such, plastic should only be relied upon for short-term storage.
Ideally, you should stick to glass containers whenever possible. Glass containers are excellent for both short-term and long-term seed and bud storage. Just don’t forget to cover them up so as to protect your seeds from light.
Additionally, don’t forget to include a desiccant in your seed container. A desiccant will work to maintain ideal humidity levels for your seeds. It will also absorb any excess ethylene that is naturally produced during the ageing process, thus extending the life of your seeds. Silica gel packs are recommended because they are reusable. However, natural desiccants like rice can also work really well, even if they have to be regularly replaced.
Methods For Storing Cannabis Seeds
For short-term storage, any airtight, light-proof container should do the job. If you are planning on using the seeds sooner rather than later, then storing them at room temperature is likely good enough. Simply load your container up with seeds and desiccant, seal it, and tuck it away in a dark, cool place where it will be protected from light and fluctuations in temperature and humidity. Some examples of common storage spots include the bottom of your closet or the back of a kitchen cupboard. This should be good enough to maintain the integrity of your seeds for a few months.
If you are planning on storing your seeds for longer than this, you should consider a refrigerator. Refrigerators are great for keeping your seeds at the low temperatures they require. Moreover, most of the time, fridges are also pretty dark and dry.
However, humidity tends to fluctuate inside a fridge, so it’s recommended that you include desiccant in your container. It is also recommended that you store your seed container toward the back of the fridge, where the least moisture is present.
Additionally, you should make sure to only store your seeds in “no-frost” fridges that can protect them from frost damage. Storing them inside of your vegetable crisper can be a good way to achieve this. Ideally, you should store your seeds in a vacuum-sealed, heat-proof container for maximum protection from the elements.
Freezing your seeds for long-term storage is also a possibility. However, it is believed that doing so may actually damage your seeds rather than protect them. Some growers even believe that freezing damages the living cells inside of cannabis seeds. Special laboratory equipment can be used to carefully lower the temperature of the seeds in order to prepare them for long-term freezing; however, most growers lack the necessary equipment to execute this process correctly. As such, while freezing may be an option for some growers, it really isn’t for most.
Other Tips And Considerations
When handling several different kinds of seeds, it’s important to label everything properly for future use. It may seem obvious, but it can be easier than you think to get your seeds mixed up, especially if you are handling a variety of strains.
Furthermore, before sealing and labelling your seed containers, you should carefully check them for pests of any kind. Just one insect could potentially damage an entire batch of seeds. Make sure to tightly seal seed containers to make them impenetrable to any wandering bugs or pests.
Sealing them tightly will also prevent them from accidentally opening should they fall over. And remember, it is never advisable to open a sealed seed container until it is time to plant them.
Properly storing your cannabis seeds is key to growing healthy plants. Find out how and where to store your cannabis seeds so they last as long as possible.