How to Store Marijuana Seeds and Preserve for a Long Time

It’s time to uncover the secrets of storing cannabis seeds, a crucial component in preserving the viability and genetic uniqueness of strains. With right storage conditions, your cannabis seeds can live for decades, extending their life and preserving their viability. This is important for passionate growers who invest time, money, and effort into building their…

How to Store Marijuana Seeds and Preserve for a Long Time
Galina Boeva

Author: Galina Boeva

Publish Date: July 11, 2023
Last Update Date: September 14, 2023

The Importance Of Storing Cannabis Seeds Properly

The quality of your cannabis plants, and thus the yield of your harvest, hinges on one crucial factor – cannabis seeds.

By storing them correctly, you can extend their germination potential, ensuring a bountiful harvest for years to come.

The Importance Of Storing Cannabis Seeds Properly

However, if they are not stored under optimal conditions, their germinating rate can plummet dramatically, leading to disappointing results or even total failure.

Some growers may find themselves in situations where they need to store cannabis seeds, such as legal limitations on the number of cannabis plants they can grow at a time or preserving cultivation of rare and precious strains.

It is imperative to understand the importance of proper stored cannabis seeds and implement the right techniques to preserve and prevent them from going to waste.

By understanding the significance and implementing best practices, you can ensure longterm viability of your cannabis seeds seeds and ultimately enhance grow quality and yield of your future cannabis plants.

How To Properly Store And Preserve Cannabis Seeds For Future Use?

To preserve the viability of cannabis seeds, it is essential to adhere to key steps of proper storage.

Select Optimal Location: Opt for a dark and temperature-stable area such as cupboard or drawer for short-term storage, No Frost refrigerator for longterm preservation.

Utilize Desiccants: Include silica gel packets to control moisture and protect from damage.

Select Appropriate Container: Use air tight container such as vacuum-sealed bags or mason jars to shield them from air and moisture. Remove all air from ziplock bags before sealing.

Shield Them from Light: Keep them in darkness by placing vacuum-sealed bags or container within light-blocking bags or opaque container.

By adhering to these guidelines, you will create optimal environment for preserving your cannabis seeds, ensuring their viability for future germination and success of your cannabis plants.

Ideal Cannabis Seeds Conditions For Preserving And Storing

Securing the longevity of your cannabis seeds requires a delicate balance between regulating humidity level and selecting the ideal containers.

To this day, silica gel packets are a popular choice among cultivators, as they effectively absorb surplus moisture and prevent the growth of mold or mildew that can harm your weed seeds.

Ideal Cannabis Seeds Conditions For Preserving And Storing

Simply place a few packets inside your container to ensure optimal humidity level.

In addition to choosing an air tight, light-proof, and moisture-resistant container, it’s imperative to select a container that’s made from a non-reactive material to avoid any potential contamination.

A popular option is a glass-jar with an air tight lid, but other options such as vacuum-sealed bags or specialized storage container is also good options.

Also if you want your cannabis seeds to last buy them from reputable bank like Dutch Seeds Shop.

Choosing A Storage Containers

In the quest for long-term preservation of your precious cannabis seeds, it is crucial to choose the right container.

The choice of container material can have a significant impact on the success.

Do not be misled by container that combine multiple materials, such as those with a metal lid and glass-body, or those with a plastic cover on top of a glass-body.

These mixed-material container are subject to temperature fluctuations, which can result in moisture or air infiltration and harm your precious cannabis seeds.

You can buy this containers at hydroponics store such as VivoSun or local garden store.While plastic container may appear air tight, they contain microscopic pores that can permit air infiltration, ultimately damaging your cannabis seeds.

An ideal container for cannabis seeds is one made of a single, non-porous material.

Glass container offer an impermeable barrier against moisture and air and are therefore an good choice for storing.

Look for a high-quality, air tight glass-jar with a secure lid to ensure optimal protection for your seeds.

Preparing The Seeds For Storage

Before you embark on the journey of long-term cannabis seed storage, it’s imperative to ensure your cannabis seeds are properly prepped.

By taking the necessary steps of drying, cleaning, and labeling them, you can ensure optimal viability and preserve germinating potential for future use.

Preparing The Seeds For Storage

Drying The Seeds

The first step is to thoroughly dry them, removing any lingering moisture that could lead to mold and bacteria growth.

Spread them out on a clean, non-absorbent surface in a well-ventilated area and allow them to air-dry for a few days or up to a week, depending on the initial moisture level.

Be careful not to use any external heat sources, as excessive heat can damage them.

Removing Any Debris Or Plant Matter

Once your hemp seeds are thoroughly dry, it’s time to give them a thorough cleaning.

This crucial step is key to preventing contamination site and the growth of harmful microorganisms.

Use a pair of tweezers or your fingers to delicately remove any remaining cannabis plant material.

Remember, handle them with care to avoid damaging their delicate cannabis shells.

Labeling The Seeds

Organizing and properly labeling your cannabis seeds is crucial step in storing cannabis seeds preparation.

Creating clear, easy-to-read labels that include essential information such as cannabis strains name or type of seed (etc. cannabis feminized autoflowering seeds, cannabis autoflower seeds), date of harvest, and other relevant details is key to future success of passion cannabis grow in soil or any other grow medium.

Securely attach labels to container to prevent mix-ups and confusion when it’s time to germinate seeds in soil and grow them in the future.

Don’t leave this important step to chance – make sure your seeds are stored safely and easily identifiable for future use and cannabis grow.

Optimal Temperature And Humidity Ranges

To ensure successful germinating in soil or other grow medium and preserve cannabis seed viability, it is imperative to understand optimal temp and RH ranges for storing cannabis seeds.

Ideal range for cannabis seeds is 42°-46° F (6°-8° C), providing stable environment to maintain dormancy and avoid unwanted germinating.

Avoid freezing temperatures, which can damage seed structure.

Maintain consistent temperature to avoid fluctuations and prevent unwanted germinating.

RH plays a significant role in preservation. The recommended range is 8%-10%, with levels below 8% increasing susceptibility to pests, and levels above 10% leading to fungal growth.

For short-term of cannabis seeds (up to several months), 20%-30% RH is acceptable.

Avoid storing seeds in 40%-60% RH range, as this promotes germination. If RH exceeds 60%, seeds may die within hours due to excessive moisture.

To maintain balanced RH levels, use air tight containers and include desiccants like silica gel or rice. These materials help prevent RH fluctuations, protecting your cannabis seeds for future cannabis cultivation.

Strategies For Controlling Temperature And Humidity

By adopting a few strategic steps, you can effectively control the factors that influence how long will your seeds last.

Select a store location that maintains a stable environment, such as cool, dark, and dry space. Basements, closets, or cabinets are good options, but be mindful of areas near heating or cooling sources that may cause fluctuations.

To maintain the ideal temp range of 42-46°F, consider investing in a controlled solution like wine cooler or specially designed refrigerator. These appliances will help you maintain consistent temperature, preventing any unwanted germination or damage.

To regulate RH levels, use air tight containers. In addition, place desiccants such as silica gel packets or uncooked rice or paper inside containers to absorb any excess moisture.

Regularly check and replace desiccants as needed to ensure they remain effective.

Finally, invest in quality hygrometer to monitor RH level within your container.

That will help you keep track of any grow changes in environment and make adjustments accordingly, ensuring that your cannabis seeds remain viable and healthy for future use and grow.

Importance Of Darkness And Minimizing Light Exposure

Lighting can be a double-edged sword when it comes to preserving the good quality and viability of your cannabis seeds.

Unwanted breakdown of essential nutrients, and growth of mold, bacteria, and pests are just some of the problems that can arise from storing your seeds in an environment exposed to light.

On the other hand, direct sunlight can elevate temperature of your area, upsetting delicate balance of RH and temperature that is vital for optimal seed storage.

So, what’s the solution? Keep your seeds in dark, cool environment to ensure long-term preservation of their quality and viability.

Light (especially direct sunlight) can have a negative impact on the longevity of your seeds, so it’s important to keep them away from light to avoid any issues with nutrient breakdown,or contamination.

Cannabis Seeds Guide To Properly Storing For A Long Time

To preserve the longevity of your cannabis seeds, it’s essential to review these crucial steps:

  1. Select an Appropriate Container: Opt for air tight and opaque containers such as jar or vacuum-sealed bags to safeguard seeds from moisture and light.
  2. Prepare Your Seeds: Dry them thoroughly, remove any debris, and label with strain and date.
  3. Control Temp°and RH levels: Store seeds at a temperature of 40-45°F (4-7°C) and humidity level of 20-30%. Use a hygrometer and silica gel or desiccants to maintain these levels.
  4. Minimize Lights Exposure: Keep seeds in a dark, cool, and dry place such as a cupboard, drawer, or basement.
  5. Consider Long-Term Seed Storage: For extended periods, consider freezing or refrigerating seeds with proper precautions such as moisture absorbers and stabilized conditions.
  6. Avoid Common Mistakes: Ensure optimal conditions and appropriate materials to maintain seed viability. 

By prioritizing humidity, temperature, light exposure, and length, you can preserve the quality and time of how long will your seeds last.

Factors Affecting Marijuana Seed Storage And Their Survive Rate

It’s crucial to be cognizant of the influences that can impact preservation and viability of cannabis seeds.

Factors such as RH, temp, light exposure, and duration must be taken into account data when storing your seeds.

Factors Affecting Marijuana Seed Storage And Their Survive Rate

By comprehending intricacies of these elements, you can take necessary measures to ensure longevity and viability of your seeds for future use.


The delicate balance of moisture levels is key to preserving the longevity of cannabis seeds, as overly humid conditions can promote the growth of mold and compromise their germinate potential.

To ensure optimal conditions, it’s imperative to maintain a low RH environment, ranging between 20-30%, utilizing desiccants such as silica gel or other moisture-absorbing materials to keep RH in check.


Whether you’re a seasoned cultivator or just starting your journey as a grower, it’s vital to understand impact of temperature on seed preservation.

Fluctuations in temperature can cause irreparable damage, reducing viability and diminishing potency over time.

For best results, aim for your cannabis seeds to be stored in consistently cool and dark location, such as refrigerator or cool basement with temperatures ranging between 40-45°F (4-7°C).

Light Exposure

Prolonged exposure to lighting can lead to disastrous consequences, as it can induce breakdown of essential compounds, leading to degradation and compromising the viability.

To safeguard against this threat, it is imperative to utilize opaque container or wrap them in light-resistant materials, before storing them in a dark and cool environment.

Length Of Storage

Duration of seed storage is critical factor in preserving their viability.

While marijuana seeds can remain viable for several years under ideal conditions, their germinate rate naturally declines with time.

By regularly checking and rotating your stock, you can ensure that you’re utilizing cannabis seeds with highest potential for germinate and growing.

How Humidity Affects Cannabis Seeds

Humidity plays a critical role in longevity and viability, and it’s important to understand how it can impact their fate.

When humidity levels are too high, it can promote the growth of mold and bacteria on cannabis seeds, leading to their rot and non-viability.

High humidity also encourages seed respiration, which can result in premature germinate of seeds.

On the flip side, excessively low humidity can dry out and diminish ability to germinate.

It’s crucial to keep an eye on humidity levels within your seed storing area using hygrometer to monitor RH fluctuations.

Any deviations in humidity should be addressed immediately before they have negative impact.

Ideal Humidity Level For Cannabis Seeds to Survive

The secret to preserving the viability and vitality of cannabis seeds lies in maintaining a consistent relative humidity (RH) of 20-30%.

Too much humidity can result in mold, while low humidity can dry them out, reducing their chances of germinate.

To maintain the perfect balance, consider using moisture-absorbing materials like silica gel packets or desiccants in your seed storage container, as well as a hygrometer to monitor levels.

Maintaining ideal humidity is imperative for longevity and success of your marijuana seeds.

How Long Are Marijuana Seeds Viable And How Long Do They Last?

The lifespan of marijuana seeds is dependent on a number of crucial factors, including storage conditions, seed quality, and genetics.

Under optimal conditions, they can remain viable for several years, even up to a decade or more.

How Long Are Marijuana Seeds Viable And How Long Do They Last

However, the viability gradually decreases over time, leading to reduced rates as they age.

Freshly harvested cannabis seeds exhibit the highest rates, which decrease as they age.

By the third year, rates may be around 50%, a significant drop from the initial 70%-80% rate within one year.

Despite rare instances of germinating after decade, it’s best to use them within 3 to 5 years for higher germinate rate and successful cultivation.

Can Cannabis Seeds Be Stored For Decades And Still Stay Good For Germinating?

Under optimal storage conditions, cannabis seeds can remain good for several years or even decades.

However, the germinate rate declines as they age, with significant decrease after 5-10 years.

To maximize germinate potential, it’s crucial to control factors like temperature, RH, lightness exposure, and good quality of container.

While it’s possible for them to remain good for decades, germinate success rate will likely diminish over time.

By carefully managing environment, you can extend seed viability and improve germinating and growing chances even after many years.

What Is Best Humidity For Seeds To Stay Dormant

The secret to preserving the germinate potential of marijuana seeds lies in maintaining the ideal RH range of 20% – 30%.

This level ensures they remain dormant, preserving their vitality and ensuring they’re ready for future use and growing.

So, if you want to keep them in their best condition for growing, make sure to maintain optimal RH.

Can Seed Go Bad After Storing?

The life of a cannabis seed is a delicate balance, subject to many external influences that can negatively impact its viability. One might wonder, can weed seeds go bad?

Whether it’s improper storage, excessive moisture, or fluctuating temperatures, these are just some of the factors that can contribute to deterioration of seed quality and eventual loss of germinating ability.

So, if you’re storing your seeds for an extended period, it’s important to remember that they are a delicate asset that must be handled with care.

Unfavorable conditions, such as those described above, can result in seeds losing their viability and becoming not plantable.

Best Way To Store Seeds Long Term

For successful long-term storage of cannabis seeds, it is imperative to maintain optimal environment that includes regulation of temperature, RH, and lighting exposure.

To ensure longevity, it is imperative to store them in a cool, dark, and dry place, such as basements or closets.

Best Way To Store Seeds Long Term

To ensure maximum preservation, use air tight containers such as jars or vacuum-sealed bags.

In addition to the air tight containers, include desiccants such as silica gel packets to control water presence in air.

Keep the storing area away from direct sunlight and artificial light sources.

Monitor the temperature (40-50°F / 4-10°C) and RH levels (20-30%) regularly.

Label them with strain, gender, and storing date. It’s also important to understand difference between female vs male cannabis.

Female produce buds rich in cannabinoids such as THC and CBD, while male are primarily used for breeding purposes.

Regardless of whether you’re storing female or male (you can not know that until you start cannabis grow), approach to long-term storing remains the same.

However, it’s crucial to label them accordingly to avoid any mistakes when it’s time to plant them.

Consider freezing or refrigerating them, but be cautious about fluctuations in warmness.

Long-Term Storage Considerations

It is imperative to comprehend importance of how to store seeds properly for extended periods, as it determines success of future germination.

To create most favorable conditions it’s important to consider several crucial factors in longterm storing seeds.

Below, we’ll explore essential options of longterm storing seeds to help you preserve viability of your cannabis seeds and ensure their expiry session longevity.

Freezing Or Refrigerating Cannabis Seeds

When choosing method for preserving cannabis seeds, consider advantages and drawbacks of each option.

Freezing is viable option, as temp remains consistent and does not fluctuate drastically.

Freezing Or Refrigerating Cannabis Seeds

Ensure that refrigerator maintains a steady temperature between 35-45°F (2-8°C), as this range will keep cannabis dormant without subjecting them to harm.

Another option is to freeze them, but this requires additional care.

First, ensure that they are thoroughly dried and placed in an air tight container with a desiccant or other moisture absorber to prevent damage during storing seeds.

This is crucial step to preserving them for extended period, ensuring their longevity and viability for future planting.

Using Desiccants Or Other Moisture Absorbers

Longterm storing of cannabis requires expert handling of water levels.

Successful preservation relies on judicious use of desiccants, moisture-absorbing materials that can effectively regulate moisture levels within a sealed container.

Silica gel packets are popular choice, their low water capacity making them ideal for creating stable environment for seed preservation.

Alternatives such as rice and powdered milk also prove effective in absorbing excess moisture grow and creating an environment that’s just right for seed longevity.

However, it’s imperative to ensure that desiccant does not come into direct contact, as this could negatively impact their longterm viability and grow later on.

Avoiding Heat And Extreme Temperature Fluctuations

To prolong the life of your cannabis seeds, it’s essential to store them in a cool, stable environment, free from extreme temperature variations.

Heat is enemy, as it can cause damage, while rapid changes in temperature create conditions for condensation within storage container, leading to mold or mildew growth.

Look for a location that maintains a consistent cool temperature, preferably in dark, temperature-controlled space like basement, cellar, or temperature-controlled cabinet.

By maintaining stable temperature and avoiding exposure to heat, you’ll ensure longterm viability.

Common Mistakes To Avoid When Storing Seeds For Future Use

For maximum longevity, it’s crucial to handle store with utmost care.

Here are some common mistakes to avoid:

  • Neglecting to Dry: Ensure cannabis seeds are thoroughly dried before storing to prevent mold growth and loss of seed viability.
  • Failure to Label: Make sure each container is clearly labeled with strain name, harvest date, and other relevant details to avoid confusion and mix-ups.
  • Store for Excessive Periods: Regularly assess viability and prioritize using older ones to maximize germination potential.

Wrong Storing Conditions

To preserve the potency and germination rate of cannabis seeds, it’s essential to provide the ideal storing seeds environment.

Unfortunately, many growers make mistakes that lead to suboptimal conditions, such as improper temp and RH levels.

Here are some common pitfalls to avoid:

  • Maintain the temperature: Store cannabis seeds at a cool and dark temperature between 40-45°F (4-7°C). Any deviation from this range can cause premature germination or reduced viability.
  • Control RH levels: Keep RH within a comfortable range of 20-30% for optimal storing seeds. Excessive RH can encourage mold growth, while overly dry conditions can harm seed viability. Use moisture-absorbing materials like silica gel in your storage containers to regulate RH levels.
  • Avoid light exposure: Prolonged exposure to light degrades the genetic material, reducing their germinating ability. Store in dark, opaque containers or use light-blocking materials to prevent light exposure.
  • Dry and Clean: Ensure thorough drying and cleaning before storing seeds. Damp cannabis seeds may rot or become moldy, while others with debris can attract pests. Don’t compromise on thorough drying and cleaning before store.

Using Improper Store Containers Or Materials

Proper way to store cannabis seeds is critical for safeguarding their quality and maximizing their germination potential.

While many growers may be familiar with the dangers of using permeable or compromised containers, it’s important to recognize that even airtight containers can pose risks if they are made from unsuitable materials.

Choosing an airtight container made from impermeable materials like high-quality plastic is the best way to safeguard against RH and warmness fluctuations.

On the other hand, avoid using previously used container that have been exposed to strong-smelling substances, chemicals, or any other contaminants.

Residual odors and chemicals can have a detrimental impact on the viability of your cannabis seeds, potentially reducing cannabis growth potential.

Always opt for clean, new, or thoroughly washed and dried container when store your cannabis seeds to ensure maximum protection against degradation.


Here are some frequently asked questions and answers.

How long do marijuana seeds last?

With proper storage, marijuana seeds can remain viable for several years, even up to five years or longer.

Can I store marijuana seeds with other types of seeds?

Yes, you can store marijuana seeds with other seeds, given the storage conditions are suitable for all types. Label each type clearly to avoid confusion.

Can I use vacuum sealing for storing marijuana seeds?

Yes, vacuum sealing is effective for preserving cannabis seeds, but remember to include a desiccant to control moisture levels.

About the Author

Share the Love: