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How To Properly Preserve Cannabis Seeds

Cannabis seeds, with their tough outer shell, seem pretty hardy. And while nature has definitely designed them to hold up to a wide variety of conditions, cannabis seeds aren’t invincible. Rapid changes in temperature and high humidity, for example, can quickly ruin a batch of seeds. Luckily, caring for your seeds is simple. Keep reading to learn how.

YOUR SEEDS ARE ALIVE

Many people forget this, but it’s true—your cannabis seeds are living organisms. Before they germinate, however, they are in a state of rest (much like some animals when they hibernate). And like all living things, seeds can die. When storing your seeds, you’ll want to give them the optimal conditions to ensure they hold through until you’re ready to germinate and plant them.

IDEAL CONDITIONS FOR CANNABIS SEEDS

Cannabis seeds have three main enemies:

  • Light
  • Humidity
  • Temperature changes

Ideally, you want to store your seeds in a cool, dark, and dry place. Whenever possible, keep your seeds in their original packaging. At Royal Queen Seeds, we’ve specially designed our packaging to protect our seeds until you’re ready to plant them.

If your seeds get exposed to light or rapid changes in temperature, these conditions will trigger them to use up their nutrient stores before they ever see soil, meaning they won’t have the nutrients they need to germinate. High humidity, on the other hand, can trigger fungi to grow on your seeds.

EFFECTS OF HUMIDITY ON CANNABIS SEEDS

Humidity is easily one of the biggest threats to your seeds. Here is how different levels of humidity (% relative humidity) affect your cannabis seeds:

EFFECTS OF HUMIDITY ON CANNABIS SEEDS

EFFECTS OF HUMIDITY ON CANNABIS SEEDS

WHERE AND HOW TO STORE YOUR CANNABIS SEEDS

For short-term storage, a dark cupboard or drawer with stable temperatures is usually fine. Try to keep your seeds out of areas of your house that are susceptible to the natural temperature changes of your local environment.

If, for example, you live in an area with very warm daytime temperatures and cool nights, try to protect your seeds from these changes and don’t store them outside in a shed or garage.

For long-term storage, it’s best to keep your seeds in a sealed container inside the fridge. Remember that opening the door of your fridge can actually cause some pretty dramatic temperature shifts. If you happen to have a second fridge that gets used less often than the one in your kitchen, use that one to store your seeds.

Again, whenever possible, keep your seeds in their original packaging. If you do open a pack of seeds and have leftovers, transfer the extra seeds directly into a sealed airtight container.

Ziplock bags, for example, are great because you can remove all the air from them to create an almost vacuum-sealed container for your seeds. Once vacuum-sealed, put your bag inside a dark plastic bag or dark container to protect your seeds from your fridge light.

Remember, modern fridges are very dry. It’s super important your seeds aren’t directly exposed to these conditions, as the lack of humidity can cause them to use up their nutrient stores just to stay alive.

CAN YOU STORE SEEDS IN THE FREEZER?

Yes, cannabis seeds can be stored in the freezer. The lower the temperature, the slower they decline. However, it’s usually not necessary to freeze your seeds. Meet the conditions we outlined above, and you should be able to preserve your seeds for up to five years and still get a high germination rate.

KNOWING WHICH SEEDS TO PLANT AND WHICH TO STORE

When you’re ready to germinate your seeds, inspect them and germinate any seeds with damage to the outer shell first. The outer shell of your seeds is designed to protect the volatile genetics inside. Seeds with cracks in the outer shell are a lot more vulnerable and shouldn’t be stored.

At Royal Queen Seeds, we take pride in our work and want to ensure every grower only has the best genetics in their garden. That means we inspect all of our seeds before packaging. If you notice any damage to your RQS seeds, get in touch with our customer service team immediately.

TIPS FOR GERMINATING OLD CANNABIS SEEDS

We’ve all found an odd seed somewhere at the bottom of an old drawer or cupboard. Here are a few tips on how to germinate old cannabis seeds:

  • Pre-soakingwith enriched carbonated water

Before germinating your old seeds, try soaking them in carbonated water enriched with fulvic acid, germination booster, hydrogen peroxide, or gibberellic acid. For best results, use room temperature water and soak your seeds for 12 hours in a dark place.

  • Scaryour seeds

Older seeds often have an extra tough outer shell. Gently scratching this shell with some sandpaper can help moisture and warmth enter your seed at the time of germination. Try gently scarring your old cannabis seeds just before soaking to help them sprout.

  • Remove a seed’s ridge

The ridge is the slightly elevated side of your seed. Like other parts of the shell, this ridge can become extra tough over time. Removing it gently with a sharp Stanley blade can help your seed sprout.

  • Slice openyour seed

In a last attempt to germinate your seeds, creating a small cut in the seed’s shell may help. However, this is no miracle cure, and you’ll need to be careful to avoid damaging the inside of your seed.

Remember, some old seeds just won’t germinate no matter how much you try. Whenever possible, avoid buying more seeds than you plan to plant so as to avoid having any issues at the time of germination.

When stored properly, your cannabis seeds can easily hold up for numerous years. Click here to learn how best to preserve your weed seeds.

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.

1. Humidity

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.

2. Temperature

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.

3. Light

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.

4. Oxygen

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.

5. Fluctuations

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. ]]>