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How Long Do Marijuana Seeds Last?

If you’re interested in growing your own weed from seeds, there are several things you need to know.

Perhaps the most important is to know how long the marijuana seeds last.

Marijuana is an excellent plant in that regard; its seeds may last for up to 10 years. Of course, this may depend on particular weed strains that you’re using as well as the quality of the cannabis seeds.

For example, better quality marijuana plants may last for up to 6 years if you keep them safe. These figures go down to 3 years for some lower-tier strains.

What are the main factors affecting longevity? 

Besides the quality of the strain, some other things have to be considered. Temperature, light, presence of oxygen, high or low humidity, can drastically impact its longevity. Like with any seed, it is essential to keep it in perfect condition.

Now, keep in mind that you shouldn’t push it too much. Five-year-old marijuana seeds are regarded as very old, according to experts. It is vital to use them as soon as possible. In fact, it is optimal if you use the seeds within its first 3 years.

Needless to say, its viability decreases with time, so if you have large quantities of cannabis seeds stored, you should consider selling them or giving them away as soon as possible.

Main things to know about marijuana germination

Always remember that the youngest cannabis seeds give the highest chance of germination. This also increases when you’re using high-quality seeds. So, if you have high-quality male pot seeds that have been harvested in the past 6 months, there is almost a 100% chance that they will be germinated.

The chance for germination slowly reduces as time passes by. For example, after a year, it drops to 85%, which is still good. But the longer you wait, the harder it gets. After 3 years, it is only around 50%. 

The best ways to preserve your marijuana seeds

There are numerous ways you’re able to protect marijuana seeds, thus increasing their viability. Most of it comes down to storing cannabis seeds. In fact, if you wish to keep high quantities of seeds, we recommend you don’t start doing it before you can secure optimal storing conditions.

 Luckily, it is possible to extend their life expectancy for years and years as long as you do everything right. Generally speaking, 4 main factors need to be considered. Marijuana seeds are very similar to most other plant seeds as you need to protect them from damage and rot.

Here is how you do it!

1. Keep the temperature low

Temperature is perhaps the most crucial factor when it comes to planting cannabis seeds. It is something that will lead to germination while on a higher temperature, it can cause a complete rotting. It is a factor that can be easily regulated as long as you pay attention to it.

The temperature needs to be kept low, approximately around 5 degrees Celsius. This will be cool enough, but you can go a bit lower. When a plant senses heat, that is a signal that growing season is upon them, which prompts the germination of your cannabis seeds. Make sure that doesn’t happen.

Heat can also cause a problem as it damages the weed seeds. Ideally, you should keep them in a freezer or some other place where you can regulate the temperature. It is also possible to keep them in a bigger space, but you will need a proper cooling system. You will also have to check that cooling system from time to time, ensuring that it doesn’t malfunction.

Here is a fun fact: the life expectancy of marijuana seeds is prolonged by a year for every -5 degrees!

2. Keep the lights dim

Light has a very similar impact as temperature. It is another natural signal to plants telling them that its blooming season. Needless to say, you need to prevent this natural occurrence. Intense light will quickly lead to germination. Like with heat, extreme light will lead to damage.

There are lots of different containers and spaces where you can leave cannabis seeds without worrying about light. In fact, companies manufacture special boxes for plant seeds, such as those of cannabis. You can easily buy marijuana seeds and other things you need online, thus eliminating all your worries.

3. Humidity can also cause issues

Humidity is another important factor. Moisture is an important element that allows plants to grow. Water is one of the fundamental substances that feed them and allow them to develop roots. This is why marijuana seeds have to be devoid of any humidity.

Most companies store their cannabis seeds in hermetically closed bags or other containers that cannot be penetrated by water. You can also bag them and then place them in a special container without light and with low temperatures.

However, there is another reason why humidity can be counterproductive. Too much of it and your weed seeds will start rotting. Most experts recommend an environment where humidity is below 5%. It is a perfect environment for any seeds, not only cannabis. It is sometimes hard to completely “such” moisture from space, but there are certain ways you can go about things.

Like with temperature, humidity has an adverse effect on seeds. While high moisture can endanger them, low humidity can prolong their life expectancy. If you reduce humidity by 1%, you can double the life expectancy of seeds.

Keep in mind that all these factors work in conjunction, so you will also have to pay attention to other things. Even if you manage to keep humidity low, this might not help if the temperature is too high.

4. Oxygen also plays a role

Lastly, it is important to mention oxygen.

As another element that is present in nature, oxygen plays a significant part in plants’ life. It affects various processes, and without it, marijuana will simply not germinate. But, it is also important for other living beings, in particular microorganisms. Bacteria and parasites also require oxygen, so if there is too much of it, they will be able to thrive. We don’t have to tell you that this would endanger seeds.

Unlike the other factors, it is tough to remove oxygen from the equation. However, you can do it by putting seeds in bags and vacuum sealing them. This will be the last step in protecting your yield.

Best tips that will help you maintain cannabis seeds

As mentioned, you have the ability to prolong or shorter seeds’ life. It all depends on whether or not you’re able to create ideal living conditions.

Here are some tips that will help you do just that:

1. Rely on airtight containers

If you’re unable to ensure there isn’t enough oxygen, then all your other efforts are in vain. This is something you always need to start from.

The best way of preserving the seeds is by putting them in an airtight container. Certain types of canisters can be used for this purpose. You should always go with smaller canister, as this makes it easier to remove all the air from the equation.

Most people make a mistake by putting seeds in a common plastic bag. While regular plastic bags are a bad solution, you should definitely consider going with a smaller Ziploc bag. Remove all the air from it, and make sure to blacken it entirely so that the light cannot come in.

2. Seal it properly 

If you’re dedicated to this idea and have a lot of seeds at your disposal, it is imperative to have a vacuum sealer that can be used on numerous occasions. It is the best way to deal with it. Not only will it remove the oxygen, but it will also do wonders with moisture. After that, you can put it in a fridge or some other place where you would like to store it.

3. Use a fridge

Having a fridge or a freezer will definitely help with heat and light. Most marijuana producers and resellers have them. They are especially great as they allow a constant temperature throughout the year. The same can be said for the light.

But, there is one thing you need to keep in mind. When you open it, there will be some condensation, which is why it is always better to keep the cannabis seeds in the back. Of course, you should vacuum seal them beforehand.

Once you’re ready to use the marijuana seeds, you will likely have to defrost them. Still, you shouldn’t do anything risky, but instead, you should simply let the seeds defrost at room temperature. It shouldn’t take too long, and by doing so, you can ensure there is no risk for them.

How can you tell if the weed seeds are still good? 

No matter how many precautionary measures you take, there is still a chance your seeds will go bad at one point. If that happens, it is crucial to recognize the difference between the bad and the good seed. A surefire solution is to try and germinate them simply.

Healthy cannabis seeds have a dark green shade, and they are very smooth and round. If they lost the color, there is a good chance they are no longer viable. The same goes if they shrivel. So, if they look the same way as when you placed them in a freezer, they are probably still good.

No matter what, you should test this through germination. You shouldn’t take any chances, especially if you kept them stored for a long time. Marijuana seeds take around 3 days to sprout, but it may take a bit longer.

If you’ve done everything right, you will have nice, healthy weed seeds at your disposal!

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