How Long Do Weed Seeds Take To Crack

Whether you are a cannabis fan who has just begun growing a couple of plants recreationally, or you are looking to test your green thumb for the first time, there is one question that’s going to come up at some point. Do seeds go bad? Let's find out! Hello, Im very very new at growing. I have alway's been interested in growing, but never really had the urge to try. I put 1 Pure Kush seed in a glass of… Cannabis seed cracker may be a handy tool to help you germinate old cannabis seeds. Find out how to safely crack seeds without it!

Do Cannabis Seeds Go Bad?

M any pot fans are starting to look into growing their own supply. After all, how hard can it be? Nature does it all the time, and it doesn’t even have any grow light options other than the sun. While you may not be producing showroom quality nugs, there’s a pride that comes with tending to your own garden and snipping buds straight off the branch. Plus, you can’t beat the price.

Plenty of online stores sell seeds so it’s pretty easy to pick your favorite strains to start. However, if it’s been a while since your seeds arrived and they’re not yet planted, you can forgive yourself for wondering if maybe you’ve waited too long. After all, how long do marijuana seeds last? Whether you are a cannabis fan who has just begun growing a couple of plants recreationally, or you are looking to test your green thumb for the first time, there is one question that’s going to come up at some point.

Do Marijuana Seeds Go Bad?

First off, marijuana seeds are the same as many other plant’s seeds. A waxy outer shell called the seed coat protects the embryonic shoot, stem, and root contained within, which are nourished by a nutrient-rich oil surrounding them. As long as the shell remains intact and the plant inside doesn’t dry out or get damaged, your seed can still grow into a cannabis plant.

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However, this shell will not last forever. Once it dries out and hardens the seed coat can crack and expose the embryonic plant to damage. Or the seed coat hardens to the point that it no longer lets in moisture. In both cases, the seed is no longer viable.

Of course, there is some debate in the cannabis community over how long do marijuana seeds last. Some growers claim that when stored in the ideal conditions, marijuana seeds can last anywhere from six months to a year after packing and still spout once placed in the soil. Other producers believe that marijuana seeds can last up to a decade if properly refrigerated in the right containers.

Most seed producers agree that on average three to six years is a maximum for viability, and every day that the seed is stored drops the chances of it germinating just a little bit.

So how long do marijuana seeds last? In general, six months is the maximum if you’re looking for a nearly 100% germination rate. After three years, you’re looking at a germination rate of around 50%.

What constitutes “ideal conditions” for cannabis seed storage also depends on the genetics of that particular plant. Some cannabis strains produce a much hardier, longer-lasting marijuana seed that can last for years and still stretch their leaves once planted. Others produce seeds that need to quickly return to the soil.

How Marijuana Seeds Are Stored

In terms of long term storage for your marijuana seeds, there are four main factors to consider:

When it comes to how long marijuana seeds last, temperature is the main factor. In nature, heat tells the seed that winter’s over and it’s time to start sprouting. If your marijuana seed’s not in the soil, this means that the plant matter inside the marijuana seed will begin to germinate and then rot.

41 degrees Fahrenheit (5 degrees Celsius) is the absolute warmest you want your storage spot to be, with the sweet spot being somewhere around 38 degrees Fahrenheit.

If you are refrigerating your marijuana seeds, they’ll last the longest in a separate unit or a spot near the back. Every time you open your fridge you are changing the temperature which can harm the seeds over time.

Humidity

Humidity is also your enemy when it comes to how long your marijuana seeds will last. When a seed gets wet, it cracks open to allow the sprout and root out. This will let in rot if the seed isn’t planted. A humidity level of about 5% is the maximum you want to allow.

Light

Much like heat and humidity, light tells that seed to wake up because it’s time to spring forth.

In order to keep your seeds from going bad, it’s best to keep them stored in a dark container in order to avoid light. photo credit

By keeping your seeds in a dark or opaque container, they’ll keep dozing long term. Light can also damage the surface of the marijuana seed, which in turn will damage what’s stored underneath, causing your marijuana seed to go bad.

Besides being dark, for your marijuana seeds to last long term, you want to expose them to as little oxygen and carbon dioxide as possible. These gasses are what growing plants breathe, as well as the pests that consume them. If you’re refrigerating or freezing your marijuana seeds, make sure your container is as airtight as possible. If you can vacuum seal them, even better.

Alternatively, if you’re planning on planting in the next few months, regular mailing envelopes will do in a pinch. They’ll keep the marijuana seeds out of the light and dry, so all you have to do is store them in a cool place. Plus, envelopes make it easy to label your strains so that you can keep them separate.

See also  Can You Drown A Weed Seed

How To Tell If Your Marijuana Seeds Are Still Healthy?

What should you do if you find some old seeds and have no idea how long they were stored? Maybe past you put them in a freezer bag in the hopes of keeping your favorite strain alive, or found a couple at the bottom of a baggie that the trimmer missed.

How do you know if your marijuana seed has gone bad, or if it’s healthy and viable to grow into a plant? There are four easy ways to check if your marijuana seed is still good.

Dark Color

If your seeds are dark brown, black, or gray, that’s a very good sign. The shell is intact and uncompromised, which means the genetic material inside has been kept safe.

Seeds should have a dark color. If seeds are still green they are probably not ready yet. photo credit

Viable seeds should also have stripes or spots all the way around. If the seeds are white or green, they’re most likely still immature.

Waxy Coating

Check if the seed still has a waxy coating. A healthy seed should have a slight sheen to it, as though it’s been oiled. This means the seed still can retain moisture.

Hard Shell

If the seed is still healthy, you should be able to lightly squeeze it without it crunching between your fingers. If the shell has no give and splits or splinters under light pressure, then your marijuana seed has gone bad and has no chance in the soil.

Cracks or Holes

If there are any cracks or holes anywhere on the shell, your marijuana seed’s likely gone bad and will most likely not sprout. Bacteria and other harmful lifeforms can find their way into the seed, or it will dry out.

The True Test of a Cannabis Seed

Of course, the best way to test whether your seeds will sprout is to plant them and see. If some green shoots climb their way out of the soil after a couple of days or weeks, you’ve got your answer.

Storing marijuana seeds is a great way to make sure you always have your favorite strains on hand, as well as to keep yourself stocked up on plants for the long haul. Luckily, marijuana seeds can last for years as long as you make sure your seeds are cool, dry, airtight, and out of sight. There’s no better time than now to learn a new skill, so let’s see how green your thumb can get.

How Do You Tell If a Seed is Good or Bad?

If the seed is dark with stripes or spots all the way around, has a waxy shell that doesn’t crack when you give it a light squeeze, and doesn’t have any visible cracks or holes, it’s probably still good. If there are holes in the shell, it’s dry, or especially pale, your marijuana seed’s probably gone bad.

Do Autoflower Seeds Go Bad?

All marijuana seeds can go bad, including autoflower seeds. However, by keeping your seeds at a stable 38 degrees Fahrenheit and at around 5% humidity, as well as airtight and out of the light, your seeds may last up to 5 years or more.

How do you like to store your seeds? Share your thoughts in the comments!

Author

Paul Barach is a Seattle-based freelance writer, editor, and author with experience creating well-researched, edited web articles covering cannabis news, culture, history and science. Paul is a regular contributor to PotGuide and has also contributed to publications such as Medium.com, SlabMechanix, Litro, and The Trek. He prefers to spend his free time outdoors and most recently hiked the Pacific Crest Trail. So far he has only fallen into the La Brea Tarpits once. You can follow him on Instagram @BarachOutdoors and stay up to date professionally through his LinkedIn page.

How Long does Germinating Cannabis Seed’s (Wet-Paper Towel Method) take?

Hello, Im very very new at growing. I have alway’s been interested in growing, but never really had the urge to try. I put 1 Pure Kush seed in a glass of water at Room Temp. 24 hours later the seed sank. I gave it one more FULL day in the glass and then i moved it to the wet paper towel method. It has been in the paper towel for about 4 days now and still no root or crack? I was just wondering if this means the seed is dead? or does it just need a little more time? Someone told me it takes around 2-3 days. TOTAL. And my seed has been germinating for about 6 days total. 2 in the water cup, 4 in the paper towel. Any thoughts?

brotherjericho
Well-Known Member

Once it sank you should have taken it out. You likely “drowned” it.

I’ve had great success with the water method, 100%. Once it sinks I go directly to soil. 3 days later, sprout.

CaptainTripps
Well-Known Member

2-3 days is typical, they can take longer. I doubt you drowned the seed either, some people germ seeds just letting them sit in water, I know they can continue to grow after they pop submerged in water. Is the paper towl being kept fairly warm?

CaliBoy93
Active Member

2-3 days is typical, they can take longer. I doubt you drowned the seed either, some people germ seeds just letting them sit in water, I know they can continue to grow after they pop submerged in water. Is the paper towl being kept fairly warm?

At first, i had the paper towel on a plate, and put a plastic bowl over it to keep in the mostiture. But I dont think it was staying very warm the first few days. Now I have the paper towel in a little black box and I put the box above my water heater and now the paper towel feels warm.

See also  Bulk Weed Seeds
delvite
Well-Known Member
montanachadly
Active Member

Each strain is different i have a few seeds that took 12 days i gave up on them thank god i checked on them 5 days after i gave up. I put my seeds in a plastic baggy sealed in a wet paper towel under my tv and almost have 100% with germination. After these seeds germinated and popped soil they took off. Hopefully it is a good seed you have there if you have anymore try them too but beware growing is very addicting i got addicted almost to like heroin addiction here with my growing i eat sleep love my plants and cannabis its horrible

CaliBoy93
Active Member

Each strain is different i have a few seeds that took 12 days i gave up on them thank god i checked on them 5 days after i gave up. I put my seeds in a plastic baggy sealed in a wet paper towel under my tv and almost have 100% with germination. After these seeds germinated and popped soil they took off. Hopefully it is a good seed you have there if you have anymore try them too but beware growing is very addicting i got addicted almost to like heroin addiction here with my growing i eat sleep love my plants and cannabis its horrible

Haha yay! that gives me some hope then. Next round of seeds ill try your method. I think the problem was mine werent being kept warm.

kodiak7
Member

yea dont give up man some seeds take longer. next time try putting the paper towel in a plastic baggie and then put that somewere war and dark. personall i use jiffy peat pellets. i had one out of a batch of 12 that didnt sprout recently and the best thing is you can put the pellet straight into the soil.

CaptainTripps
Well-Known Member

Haha yay! that gives me some hope then. Next round of seeds ill try your method. I think the problem was mine werent being kept warm.

The might pop then if they were being kept cold. I have nothing but problems trying to germinate without heat. You also dont want your paper towel to be too wet. just damp no dripping water.

brotherjericho
Well-Known Member
operationkush
Member

The might pop then if they were being kept cold. I have nothing but problems trying to germinate without heat. You also dont want your paper towel to be too wet. just damp no dripping water.

They need to be warm. My method is glass of water until sunk. Into paper towel damp, not dripping wet. Fold it twice and place into plastic bag. I set the bag ontop of my router, its a nice warm location that doesnt get too hot. Just be sure to FOLD the paper towel, the extra layers are protection from too much heat and also from the light if your router is in the light(which mine is). My last germination attempt was on 34 seeds, 17 widow, 17 blueberry. Had 100% germ on the seeds. They were non fem from BCSeedKing.

Just my 2 cents.

polyarcturus
Well-Known Member

it can take 1 day up to 2 weeks. glass of water is fine it will not drown as there is o2 in the water after it sprouts a little tail (another day after it pops) remove it from the water as there will now be a slight risk of it drowning.

ReignboCloudz
Active Member

I have 4 Orange bud seeds and 1 seed I found in some purple.. they all sunk now I’m.waiting for them to sprout in paper towels. 1 has even gotten green not mildew but a wet flower green no sprouts in a apt so Where is the bed place for good heat.. in paper towel inside plastic bag in side a black plastic bag and inside a drawer. Been 6 days now.. should I just pop these in miracle grow?

bigsteve
Well-Known Member

I use the papertowel method. I don’t look at them until after 48 hours. I usually see most with small roots. 24 hours later and 95+%
will have a 1/2 inch root or bigger and ready to go into dirt. Remember to keep the soggy papertowels sealed air-tight, especially
after the 48 hour check.

Kordz85
Member

I’m new to growing herb but not to gardening. I don’t use the shot glass method as I’ve had a 0% success rate but using the paper towel method i place the towel between 2 paper plates and set it on my cable box(warm and constant) 2 days later maybe all but 1 pops half inch tails. I was away for 3 days once and a few had shed their seed casing and had embryo leaves and grew into the towel, but I just cut around the root and planted the into my grow medium(paper towel is biodegradable) and they grew just fine.

KT420
Active Member

I have 4 Orange bud seeds and 1 seed I found in some purple.. they all sunk now I’m.waiting for them to sprout in paper towels. 1 has even gotten green not mildew but a wet flower green no sprouts in a apt so Where is the bed place for good heat.. in paper towel inside plastic bag in side a black plastic bag and inside a drawer. Been 6 days now.. should I just pop these in miracle grow?

green isn’t good.. . I sed to use paper towl on a plate on top of the TV, back when Tv’s where thick enough to set stuff on, heh, but I felt the evap from the plate cooled too much, so I switched to paper towels in a small (6 quart) sterlite with lid on, and set it behind computer tower so the exhuast fan blows on it. Watch TV on the computer now too, heh

See also  Blue Dream Weed Seeds
ReignboCloudz
Active Member

green isn’t good.. . I sed to use paper towl on a plate on top of the TV, back when Tv’s where thick enough to set stuff on, heh, but I felt the evap from the plate cooled too much, so I switched to paper towels in a small (6 quart) sterlite with lid on, and set it behind computer tower so the exhuast fan blows on it. Watch TV on the computer now too, heh

It’s not bad green it just look like a fresh seed green I have them in a damp not dripping paper towel on top on of a lamp. The lamp is.a desk lamp with a hard glass like shade its keeping it warm not hot we shall see. I.still.have hope 5 of these babies something has to.give or ima.just pop them in soil and hope for the best

rixter1986
Member

Just pop tha bitches straight into the soil lightly water and pop some cling film over the pot put in worm dark place 2-6 days later whalha got a seedling neva mind paper towels and glasses of water

dieselmj
Member

I wouldn’t use the paper towel method. Your seeds will be alot better off if you germinate directly in soil. what I do is soak the seeds in plain water for 12 hours prior to planting to hydrate them, which will speed up germination. It’s also possible that you may have a batch of bad seeds. in general, good seeds will sink, bad seeds will float. Here it’s some resources on how germinate marijuana seeds:

Menfee
New Member

I dont grow any of the good shit like any kids of kush or what in florida its all called dro but i mainly grow high grade mids cause I think its the cheapest and easiest way to grown weed other then just throwing them bitches in dirt and hope they grow. but anyway when I germinate my seeds I take a paper towel put two seeds on it fold it over pour water of it put it in a bag and that the seeds do their own thing when they start to sprout i give in about another day or two (or until the roots have grown at least an inch) then i put them in little starter pots and put them outside until the grow about a foot them in my closet with a fan and two led lamps (i only grow for personal use) it takes about about 4 months sometimes sooner before they are ready to harvest

Cannabis Seed Cracking Without a Cracker Tool

If you crack weed seeds just before germination, it may help them sprout

Sometimes, marijuana seeds are too weak or too old to sprout quickly, so you need to use some techniques to help them germinate. In this post, I will describe just one method – cannabis seed cracking.

The idea is that cracking requires some energy from an embryo and not all of them are strong enough for that. If you do this job for them, you help your seeds save energy and germinate faster. Besides, the process of germination requires some water to penetrate the shell, and if the seeds are old or haven’t been stored properly, their shell can get too dry to let water inside. The downside to this method is that you can damage the embryo if you squeeze the seed too hard.

Cannabis Seed Cracker: Is It Really Necessary?

I’ve come across a forum thread where people discuss buying a special cannabis seed cracker tool. I even watched a video where a weed grower uses it for seed cracking. You may google this gadget and spend a couple of dozens of dollars on it. But in my opinion there’s nothing special about a seed cracker. It’s just a simple contraption to hold a seed in place and gently apply pressure on it until the shell gives way with an audible crack. The cracking is done one seed at a time.

The good news is that you can do the same with your teeth just as easily!

Just firmly hold the seed with your finger tips, with the ridge positioned vertically and the pointy end facing outward. Gently bite on it with your teeth until you hear it crack. Then use your favorite germination method.

Cracked vs Uncracked

In my little experiment, I used 4 seeds of my OG Kush Auto that I’ve created myself. For some reason or other (because these feminized seeds were made by self-pollination maybe?), these beans are not very quick, especially if the room temperature is low, like it is now – 65-68 °F (18-20 °C). Let’s see if cracking makes any difference.

I’ve just placed 4 pot seeds between wet cotton disks.

After 36 hours, 2/2 of the cracked seeds and 1/2 of the uncracked (the one on the left) have shown tap roots.

After 60 hours, the situation has changed in favor of unckracked seeds. A least, the one in the bottom-right corner seems to be the winner.

72 hours (3 days) have passed, and the last seed to crack is also the strongest. The seeds that were cracked have crooked and somehow yellowish tap roots.

What Has My Cracking Experiment Demonstrated?

It is true that when you crack your marijuana seeds before germinating them, they may show tap roots earlier. However, the first one out of the gate isn’t necessarily the winner. Out of four seeds that I germinated I would definetely choose the one that was the last to crack. So, if you have a good fresh batch of seeds, don’t risk damaging them by cracking their shells. If the seeds are too old or haven’t been stored properly and wouldn’t germinate in a regular way, cracking may help.