Yes, cannabis seeds spoil, like any other seed. Or any other organic matter, period. However, weed seeds can last a long time. In fact, they can be viable for more than 5 years, if properly stored.
Even if you store them in a drawer or something, they can last a year or two. The sign of a bad seller is that their seeds are constantly old, dead, and covered with powdery mildew. That said, don't be too harsh on a seed bank if a couple of their seeds don't work from time to time when, in general, they're reliable. It is useless for growing seedlings, it is interesting to note that it is certain wavelengths of light that affect germination and it is the blue length that tends to corrupt germination, while the red wavelength promotes germination.
You'll also have to keep that in mind when buying your seeds. While cannabis seeds can remain viable for a large number of years if stored in perfect conditions. They can be ruined in a couple of weeks if not stored properly. Those that float on the surface are bad seeds that are unlikely to grow, while seeds that sink are likely to be healthy.
You may have no idea if your seeds are healthy, but trying to grow them is an easy final test that will separate the good from the bad seeds. If you purchased the seeds from an online seed bank, they were likely mailed to you in a vacuum-sealed container. Sticky Seeds has enjoyed great success within its niche and is known as one of the most trusted cannabis seed stores in England. But 85% of these seeds germinated and now 5 weeks after being vegetables and they grow more vigorously than some seeds I bought a few years ago.
I placed some seeds that I had collected over the past year in what I call floating bed trays (homemade) on March 26, now here is April 2 and I haven't had any outbreaks, I expected a cold night or two still ahead, so I placed them maybe a little more than half an inch if I still expected some to rise or what did they drop unexpectedly to 23 degrees a couple of those nights, but everything was covered and the seeds were still underground. If you store your seeds properly, they could last a good five years, some have claimed that germinated seeds have been stored for more than 10 years; so it's always worth taking a look at them before discarding them. Sticky Seeds is an online cannabis seed store that specializes in distributing the highest quality cannabis genetics worldwide. A lot of times you end up not using all the seeds you bought, or you decided to keep some of the seeds that your own cannabis plants have produced because you want to keep genetics going, so you want to store them safely.
Even though seed banks recommend planting weed seeds within a year of purchasing them, they can have a shelf life of up to five years if properly stored. It's also important to start with quality seeds, so make sure you buy seeds from a reputable seed bank. This can cause the seed to consume its nutrient stores in the oil sac, which means that they are no longer available in the future, when actually trying to germinate the seed. The seeds should be stored in the dark, so cover the glass jar so that no light enters, cover the seeds inside the mason jar, or make sure the storage location is in complete darkness.
Once the outer layer of the seed has cracked or broken, genetic information or material inside the seed is compromised. Germination is not just about cracking of the seed and the appearance of a taproot, but about the transition from a seed to a very small but viable cannabis plant. .