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old marijuana seeds won’t germinate

Okay, so maybe you didn’t have that information on hand when you scored your last round of seeds. Not to worry, there are quite a few clever, science backed tricks that you can employ to revive your little glory bombs. The problem with most old seeds, whether stored properly or not, is that as the seeds ages, it’s shell hardens. This makes it extremely difficult for water to get inside the seed to help your little seedlings grow and emerge. The best ways to reinvigorate old seeds is to find clever ways of penetrating their heavy duty shells.

One of the best, and most readily available, places to store seeds long term is to stick them in a refrigerator. Ideally, you don;t want to freeze the seeds, as any moisture that may be contained inside can crystallize and harm the future seedling. So, keeping them at a cool 6-8 degrees Celsius (42-46º F) is far better than a deep freeze. That will pretty much obliterate the heat element.

Another way to coax the shell to break down a bit is to add some fulvic acid to your original water source. A concentration of about 10ml/L is suggested. Fulvic acid is a natural component of healthy soil. It’s an organic polymer that is extracted from humus. It helps further facilitate the breakdown of the marijuana seeds outer shell and also encourages healthy plant growth.

Wet Paper Towels

You might find yourself asking “How long do marijuana seeds last?” This is a great question, and the answer almost solely depends on the methods of preservation. Depending on how you’ve stored your seeds, they can essentially last indefinitely.

In order to store seeds correctly, you’ll have to provide them with a cool, dry environment. The idea here is to prevent the seeds from trying to germinate before you’re ready to stick them in the ground. Light, water, and heat are all things that help seeds sprout, so it should come as no surprise that you’d need an almost total absence of these things in order to store seeds for long periods of time.

As they say, not all heroes wear capes, and absolutely zero of them toss old seeds.

For stubborn seeds, place them in a glass of water with a few drops of hydrogen peroxide for about 24 hours. The hydrogen peroxide will help break down the outer shell and get water into the sprout where it’s needed. Once the seeds are done soaking, take them out of the mixture and rinse, then follow up with the soil or paper towel method.

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.

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.

LET MOTHER NATURE DO HER THING

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:

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.

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

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.

As cannabis seeds age, their protective outer shell hardens and prevents water from passing through. Unless the tiny, dormant embryo that lives inside the shell detects moisture, it doesn’t know that the conditions are right to sprout. As a first step, pre-soak your old cannabis seeds for about 12 hours to see if that does the trick.

In a life or death situation, surgery may be the only option. Meaning—only do this if nothing else has worked because this technique ruins as many seeds as it saves.

1. PRE-SOAK WITH SUPPLEMENTED WATER

The older a cannabis seed gets, the harder it is to pop. But hard doesn’t mean impossible. If you’ve been saving your seeds for a rainy day and it finally started pouring, these tips could help you get most, if not all, of your old beans to germinate.

To improve your chances, use carbonated water and/or add one of these supplements that help with water absorption. Fulvic acid and most boosters also give your seeds a light dose of nutrients.

If you’re going to keep seeds more than a year or two, proper storage will dramatically increase the chances of late-stage germination. Place them in an airtight container. Put the container in a refrigerator set at 6–8°C with 20–30% relative humidity. If excess moisture is a concern, add silica gel packs to the container.