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Will Cannabis Genetics Be Banned?<
Posted on August 6, 2026 by Nila
What Do Cannabis Seeds Look Like?
The visual traits of cannabis seeds is a question that raises numerous questions amongst growers. We often get asked about the way cannabis seeds should look, with regards to their size, shape and colour, as these factors are believed to be strongly related to seed quality. In this guide we take a thorough look at the main physical characteristics of cannabis seeds in order to clarify any concerns that you may have.
This article has been designed to answer all the important questions that we regularly get asked by clients and growers about the physical traits of our core product: high-quality cannabis seeds.
Our decade and a half in the business have given us solid knowledge as well as an extensive perspective on this subject, so it is an honour for us to be able to share our experience with all of you in the cannabis world.
The size of cannabis seeds
As most of the cannabis strains that are currently on the marketplace are polyhybrids, the dimensions of the seeds can differ depending on their genetic line.
Some clients, for instance, reach out to us to tell us that they have acquired Critical + seeds and they believe they look too tiny. But this is a normal feature of this variety: https://nativesusa.com/ (nativesusa.com) we’ve seen millions of Critical + seeds and we can confirm that they are naturally smaller than others. It is hence incorrect to believe that this is a sign of poor quality.
If, on the other hand, the seeds look too big, this may be triggered by a shortage of macronutrients during the plant’s growth cycle. As any grower with some experience will understand, calcium deficiencies are fixed by adding calcium and magnesium, a mixture that helps reestablishing the ideal nutritional balance of plants.
So in this instance, an increase in size could be a clear indicator of this addition of calcium and magnesium, which is carried out in order to address that macronutrient shortage during growth. This has no influence on the crop’s potential for germination, growth, flowering, or harvest, nor on the development of the organoleptic characteristics of the buds (aroma, flavour and effect).
So we can confidently say that this difference is simply aesthetic. If we take the case of a Moby Dick seed, its dimensions will most likely be bigger than those of Critical +, although you can also encounter slight variations between seeds from the same strain. Don’t forget that, as with all living beings, cannabis seeds are also biologically different amongst themselves.
The structure of cannabis seeds
Cannabis seeds can also show slight changes at morphological level. It’s perfectly normal to discover minor differences in the oval shape of seeds from the identical batch.
In some cases their shape is more linear; whereas in others one of the extremities can be rounded whilst the other is more tapered. But this is no reason for concern: as with size, these slight differences in the outline of the seeds are simply visual and have no relation to do with quality.
Related post: The most frequent mistakes when sprouting cannabis seeds
The hue of cannabis seeds
Although it is accurate that ripe cannabis seeds usually to have a dark shell that can go from brown to black, with markings that look like zebra stripes, this cannot be viewed as a reliable quality indicator by itself.
Yet once more, this is a deceptive physical attribute that does not assure the germination capacity or overall traits of an individual seed. A top-grade strain can also be pale or dark grey in colour.
Let’s take the example of Critical + again, one of our well-known bestsellers that has had outstanding success across the globe thanks to its exceptional scent, flavour, effect, and production capacity.
Critical + is a clear example that colour, contrary to what many cultivators believe, is not necessarily a direct quality marker: these unquestionably high-quality seeds show a distinctly light grey, almost whitish grey, to a medium grey colour.
However, a green-tinted colour is a definite sign of underdevelopment, which means that the seed hasn’t developed fully or it hasn’t received all the necessary resources to achieve full maturity. In this specific case, if you acquire seeds with this color you need to reach out to your supplier immediately and try to have them exchanged.
If this occurs to you with one of our seeds, don’t hesitate to contact us immediately. Send us a few of pictures so we can examine them out, and our customer service team will replace them as soon as possible.
Another factor that can be misleading is the fact that a mature, freshly-harvested cannabis seed has a brighter and darker color than after it’s been packaged for one to two months.
This could be compared to a baby whose physical appearance quickly evolves during their first few days of life in order to adapt to the completely new outside surroundings.
The same thing happens with cannabis seeds: the storage and the different stages before they’re commercialised can entail light and humidity variations, as well as a bit of oxidation, which may slightly affect the colour of the shell but certainly has no impact on the final product. Once more, this is just an aesthetic effect.
We hope that this guide has provided you with some helpful information about the physical traits of your cannabis seeds to assist you interpret them more objectively before starting their sprouting and cultivation.