Although it is true that ripe cannabis seeds tend to have a dark shell that can go from brown to black, with lines that look like tiger stripes, this cannot be regarded as a quality indicator by itself.
Cannabis seeds can also show slight changes at morphological level. It’s perfectly normal to find minor differences in the oval shape of seeds from the same batch.
As most of the cannabis varieties that are currently on the market are polyhybrids, the size of the seeds can vary depending on their genetic line.
Some customers, for instance, contact us to tell us that they have bought Critical + seeds and they believe they look too small. But this is a normal feature of this strain: we’ve seen millions of Critical + seeds and we can confirm that they are naturally smaller than others. It is therefore incorrect to think that this is a sign of poor quality.
However, a greenish colour is a clear sign of immaturity, which means that the seed hasn’t developed fully or it hasn’t received all the necessary resources to reach full maturity. In this particular case, if you purchase seeds with this colour you need to contact your supplier immediately and try to have them replaced.
This could be compared to a newborn whose physical appearance quickly evolves during their first few days of life in order to adapt to the completely new outside environment.
The same thing happens with cannabis seeds: the packaging and the different stages before they’re commercialised can entail lighting and humidity changes, as well as a bit of oxidation, which may slightly affect the colour of the shell but definitely has no impact on the final product. Once again, this is simply a visual effect.
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Quality seeds will sink in water. In glass or vessel, place room temperature water deep enough to full cover the volume of seeds to be tested. Place your seed or seeds in the water. After a couple of hours, anything still floating, should not be considered a quality seed. Soaking seeds will allow moisture to cross over the protective membrane and signal the seed that it is time to grow. As such this test should not be performed if the intent is to store the seeds after testing as it may render otherwise quality seed unviable if not meant to be immediately germinated afterwards.
Takeaway: If you’re looking to start growing your own marijuana, the first place to start is with the seed. What should you look for? How can you tell a good cannabis seed from a dud? Chris Bond tells us.
#7 Float test
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