Be sure to separate the pack from the seeds with a couple cotton balls or a paper towel. This will help absorb excess moisture at the start as well. If you have a method to vacuum seal the jar even better. Wrap the jar in something opaque and you’re all set. Seeds stored at a stable room temperature can last for over a year. Refrigerated they can last a couple years.
In conclusion, cannabis seeds can be stored for the long haul and stay viable as long as they’re kept away from heat, light, moisture, and air. The more care you put into your storage method, the longer your seeds will last. However, when it comes to planting seeds with the most chance of success, sooner is always better.
Some cannabis strains (and some specific batches of those strains) naturally produce seeds that are hardier and longer-lasting than others. This plays a role in how long you can expect your seeds to remain viable, so be sure to do some research beforehand.
When it comes to preserving your seeds for future planting, temperature is the main consideration. In nature, heat is what tells the seed that the winter’s over, which means that it’s time to break open and start sending roots down and shoots up. If your seed’s not in the soil, this means that the plant matter inside the seed will begin to germinate. The shell will crack open, letting the plant matter out and moisture, bacteria, and pests in. Without soil to thrive in, the seed will begin to rot.
Besides being dark, you want to expose your seeds to as little oxygen and carbon dioxide as possible. These gases are what growing plants breathe, as well as the pests that consume them. If you’re refrigerating your seeds, make your container as airtight as possible. If you have some vacuum-sealed plastic on hand, even better.
First, let’s go over the five main factors to consider when it comes to storing your cannabis seeds, especially for the long term.
Of course, this method is only as good at the stability of your home’s climate. If you live in a humid area prone to frequent storms or weather fluctuations like Florida, envelopes will only get you so far without ruining your seeds.
Seeds of Wisdom
It’s very important that this temperature remains stable for the long term. If you are refrigerating your seeds, your best bet is to place them in a separate unit or a spot near the back. Every time that you open your fridge the temperature fluctuates, which can harm the seeds over time. While it’s up for debate whether freezing seeds is an effective method for long term storage, we don’t recommend it unless you know exactly how to cure and prepare your seeds. Otherwise, the frozen water in the seed’s cells can expand, destroying the cell wall and killing the seed.
Light exposure over time can also damage the surface of the seed, which in turn will damage what’s stored underneath. The solution, much like storing cannabis flower and other products, is to keep your seeds in a dark or opaque container. Without exposure to light, they’ll keep dozing long term.
Seeds must be stored in the dark, because light triggers germination. If seeds are exposed to light, even if they do not have any of the other conditions required for germination, the chemical processes for germination are triggered.
Let’s find out exactly what you need to do to store marijuana seeds the right way and ensure you can still germinate them successfully several years down the road.
In order to keep your seeds viable as long as possible, you want to make sure you store them in an environment that is cool, dry and dark. You also want to make sure the container you store them in is sealed tight, because the most important factor in making sure your seeds last is a consistent environment. Fluctuations in light, temperature and humidity do serious harm and will likely render your seeds useless.