Germinating Old Weed Seeds

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Here are some good tips for germinating seeds that are hard to start or are having trouble germinating. Have some patience though as it could take Just found some seeds at the bottom of a random drawer? Here are some tips to help you germinate old cannabis seeds. It's hard to germinate old cannabis seeds, but with the right type of method your chances increase ten fold. Check out the Top 4 ways to get those seeds to Crack.

5 Tips For Germinating Old Seeds

Here are some good tips for germinating seeds that are hard to start or are having trouble germinating. Have some patience though as it could take anywhere from three days to three weeks for a seed to germinate. Some of these tricks I would only use if the seed has not sprouted after two to three weeks or if you have a few seeds in reserve from a batch that haven’t germinated.

Seeds are comprised of an outer hard layer and an embryo which is inside the hard shell. The reason that older seeds don’t germinatem well is that the shell has become to hard and water is unable to penetrate, this process of imbibition is the start of the germination process. The seed will swell with water and eventually the shell will pop open and a small tap root will erupt.

One thing i wouldn’t do is to germinate your seeds on a paper towel. White paper is filled with bleach and other chemicals and is not a good thing for your plants. Use small jiffy starter blocks or a light soil:

1. Dilute 10ml (roughly one tsp) of Fulvic acid per litre (33 oz) of water.

2. Scuff the outer shell of the seed with some sand paper. Roll up a small cigar or sand paper or line a match box and gently shake the seeds over it. This will create micro abrasions letting in more water.

3. Use a lightly carbonated water. The extra Co2 will help the water penetrate the seed.

4. Use a light enzyme or seed booster, Plagron Nutrients has a very good one.

5. Finally if all else fails use an Exacto knife to slightly slice the seed open down the spine of the seed. This will make it easier for water to penetrate the shell.

Here’s How To Germinate Old Cannabis Seeds

Old cannabis seeds can be hard to germinate. Luckily, there are a few techniques that can help them sprout, even if they’ve been forgotten for some time.

Did you find some old seeds in a forgotten corner of the house? Well, you’re in luck; below we’ll share some simple tips to help you germinate old cannabis seeds.

BEFORE YOU START, SET YOUR EXPECTATIONS STRAIGHT

Before you start, it’s important you remember the following:

• Seeds can take a while to germinate. While healthy, fresh seeds can germinate in just a few days, old seeds can take anywhere from 2 days to 3 weeks to sprout. So be patient.

• Some seeds won’t germinate at all. Unfortunately, old seeds sometimes just don’t sprout. So, if you try all of the tips below and wait patiently without any luck, it’s likely your seeds are just too far gone.

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TRY SCARRING YOUR SEEDS

One of the main reasons old cannabis seeds don’t germinate is because they tend to have a very hard outer shell. Now, cannabis seeds naturally have a hard shell that helps protect them until the conditions are right for them to germinate. Over time, however, this outer shell can become so hard that it inhibits the seed from germinating altogether.

To help older seeds along, it’s a good idea to try scarring them. To do so, simply line the inside of a matchbox with some fine sandpaper, place your seeds inside, and shake the box for a minute or so. This will help make some small cuts in the seeds’ outer shells to help them absorb some moisture.

If this isn’t enough, you can try carefully (and very gently) using a sharp knife like a Stanley blade to remove the ridge running along the middle of each seed. This should expose the inside of the seed a little, helping it absorb moisture and, hopefully, giving it a better chance of germinating.

TRY GERMINATING YOUR SEEDS IN CARBONATED WATER

Try dropping your old seeds into a glass of sparkling water. The CO₂ in the water should help the seeds absorb more moisture, encouraging them to sprout. You can also add some fulvic acid to the water to help break down the shell of your seeds. You’ll only need about 2.5ml of acid for a glass of sparkling water (roughly 250ml).

TRY “THE PAPER TOWEL METHOD”

This is a very popular way to germinate seeds. And for good reason; it’s pretty successful. Here’s how to germinate your cannabis seeds using paper towel:

1. Place 2 pieces of paper towel inside a salad plate.
2. Dampen the paper towels and place your seeds on top of it.
3. Cover the seeds with another 2 pieces of damp paper towel, then cover the salad plate with another plate, and keep it in a warm, dark cupboard.
4. Check on your seeds every 2–3 days.

LET MOTHER NATURE DO HER THING

Sometimes, it’s best to leave Mother Nature to work her magic on your old seeds. Try scarring your seeds a little as we showed you earlier, then let them sit in carbonated water overnight. Next, prepare a small nursery pot with some high-quality soil. Make a small hole in the middle of the pot with your finger, roughly the depth of your fingernail. Drop your seed inside the hole and cover it. Moisten the soil and keep your pot in a warm place with indirect sunlight—a windowsill works great.

REMEMBER TO STORE YOUR SEEDS PROPERLY

If you’ve tried all our tips above and still haven’t managed to germinate your seeds, it’s likely they are beyond the point of return. To avoid having the same problem next time, here are some tips to help you store your seeds:

• Seeds like cool, dry, and dark places.
• Quick changes in temperature and humidity are really bad for seeds. Try to keep them in a jar or other container to protect them against these environmental factors.
• Seeds don’t like light. Keep them in a dark place and avoid any unnecessary exposure.
• All of our seeds are vacuum-sealed. For the best germination rates, only open a pack of seeds when you’re ready to plant them.

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4 Top Ways How to Germinate Old Cannabis Seeds so they Crack Open

You may have found some old cannabis seeds that you forgot about.

Or maybe haven’t gotten around to planting them and are wondering how to get them to germinate.

The older they are, it’s hard for them to crack their shell.

I have tried various ways to get older seeds to sprout, some successful some not.

There are methods that work better than others.

These are the methods we found to help germinate old cannabis seeds and get them to sprout.

Let’s check them out,

How to germinate old cannabis seeds:

Pre-soak method

The pre-soak method is one way to kick start and germinate old cannabis seeds into sprouting.

We usually start all of our seeds off this way even if they are newer seeds.

It’s recommend you have your water solution at room temperature around 20 degrees Celsius or 68 degrees Fahrenheit.

You can have it warmer depending on the climate you live in. But not too hot.

** Please note: Do not soak your seeds longer than 20 hours or you risk drowning them **

There are a few different additives you can use hydrogen peroxide, carbonated water.

We have also heard of fulvic acid but (it is not covered in post because we never used it.)

Hydrogen Peroxide:

When using Hydrogen Peroxide in soaking your seeds it adds extra oxygen to the water.

This can help the cannabis seeds absorb the extra oxygen for the tap root. Roots like oxygen.

To make this solution use a ratio of 100:1. Use 100 ml of water to 1 ml of hydrogen peroxide.

Next take purified water at room temperature and mix in your hydrogen peroxide.

Then place water solution in a shot glass or glass of your choice then drop the seed in.

Put the glass in a dark warm area.

Wait anywhere from 8-18 hours, tap the seed to see if it sinks. If it does then it has absorbed the water it needs.

You can now either plant it in the medium, pointy side facing down.

Or you can place then in a paper towel soaked container with your hydrogen peroxide solution and use the paper towel method to sprout them.

Carbonated water:

To use carbonated water to germinate old cannabis seeds it’s really simple.

Use room temperature carbonated water (un-flavored).

We recommend you have your water solution at room temperature around 20 degrees Celsius or 68 degrees Fahrenheit.

You can have it warmer depending on the climate you live in.

Simply drop your old cannabis seed into the water and store in a dark warm area for about

Put the glass in a dark warm area.

Wait anywhere from 8-18 hours, tap the seed to see if it sinks. If it does then it has absorbed the water it needs.

You can now either plant it in the medium, pointy side facing down.

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Or you can place then in a paper towel soaked container with your hydrogen peroxide solution and use the paper towel method to sprout them.

Scratch Method:

With the scratch method it’s really simple to do all you need is a fine grit sand paper.

Some people use an empty match box to put the sand paper in.

Then the next step is to simply put the seed in a “matchbox with sand paper” and give it a shake once or twice is enough.

What I have found best if you don’t have an empty match box and do not want to take all the matches out of the box.

Cut a piece of sand paper about 3 inches by 3 inches.

Next roll it up so it’s the shape of a tube and wider than the seeds, then put some tape on it to keep it together.

Then just put your finger on one side of the opening to close it.

After that place the seed in the tube of sand paper put your other finger on top and give it a shake once or twice is all that is needed.

Once your old cannabis seeds got there shake on.

The next step is to put them either in a Pre-soak, paper towel method, or grow medium of your choice soil coco, rockwool.

Slice Method:

The slice method is the last resort and a very extreme measure to try and get the seed to germinate and sprout.

After you have tried the methods mentioned above.

You will need a very sharp knife like a razor blade (make sure it is sterile, use some alcohol on it)

Take your old seed and make a slice along the middle of the seed where you can see the division of both sides of the seed.

Now place the seed into the soil, coco, rooting plug or Rockwool of your choice.

Ridge Method:

Some cannabis seeds have a ridge on one side of the seed that is protruding.

You can try and gently remove the ridge with a razor blade if you wish this may allow the seed to sprout open.

Then place the seed into a growing medium or a sprouting method like paper towel or rooting plug.

Final Thoughts

Trying to germinate old cannabis seeds can be very difficult.

Especially if they are not wanting to crack open. About 50 to seventy 75 percent of the time this can be the case.

Try to use some of the methods mentioned like the scratch, pre-soak, and paper towel method.

You could be on the right track to getting them to sprout out.

When you have old seeds you should always try and germinate them.

Because you never know they just might grow up to be a fantastic cannabis plant.

If you want to learn more about germinating cannabis seeds check out our post on it here: Germinating marijuana seeds

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