Place two packs of CBD seeds next to each other, one marked 1:1 and the other 20:1, and the two look the same: the same brand foil, the same seed count, seeds that no eye can tell apart. Grow them side by side and they part ways at the very first step and never converge again. The cause is a single gene, and the easiest way to see what it does is to track the two packs along each stage both share: the breeding that made them, the seed, the seedling, the flower tent, the cut, the jar, the lab bench and the border. The lines used as reference points throughout are taken from the range at https://calmcbdseeds.com, which goes 1:1, 2:1 and 20:1 with a highest line at around 30 to one; the genetics is the same regardless of which shop the seeds came from.
How Each Pack Was Made
Cannabis settles if it is going to make THC or CBD at one locus on the genome. The gene there exists in two forms: one builds the enzyme that turns the shared precursor into THCA, the other the enzyme that converts it into CBDA. Each plant carries two copies, one received from either parent, and the pair fixes the chemotype. Two THC copies make a THC-dominant plant. Two CBD copies make a CBD-dominant one. One of each gives a balanced plant, since the two forms are codominant and neither overrides the other.
The balanced pack was bred by crossing two balanced plants, each carrying one copy of each version. The 20:1 pack was bred by crossing two plants which each carry two CBD copies and no THC copy between them. That one fact at the cross decides all that follows downstream, and it is already inside the seed before it is packed.
The Mendelian Split
Cross two balanced plants and the offspring sort out by the oldest rule in genetics: a quarter inherit two THC copies, a quarter inherit two CBD copies, half get one of each. In a pack of 10 seeds that means, on average, around two THC-dominant seeds, around two CBD-dominant seeds, and five genuine balanced seeds. The pack is labelled by its parents, and for half its seeds the label fits; for the other half it is a description of something else. Calm CBD Seeds prints the expected split on every balanced line, which means the buyer knows before sowing that a portion of the plants are going to depart from the headline ratio.
The 20:1 pack carries no such split. Each seed got a CBD copy from each parents, every plant will be CBD-dominant, and the ratio on the foil applies to all of them, give or take the ordinary differences in the amount of total cannabinoid an given plant produces. The trade say these lines “breed true” for chemotype; the phrase means exactly this lack of surprise.
Stage Three: The Seedling Tray
At this stage the two packs appear alike again, and the likeness lasts longer than many growers expect. Chemotype shows no trace on a seedling. Leaf, colour, internode spacing and growth rate are controlled by other genes altogether, and the different kinds of plant in the balanced pack come up without any visible difference beside one another and from every plant in the 20:1 pack.
One real difference during this stage comes from ancestry not chemotype. Strains with recent hemp ancestry, and that covers some less developed CBD-dominant strains, tend to grow rangier and branch less. A well-worked 20:1 strain grows like any modern hybrid; a young one still carry the hemp in its frame. Neither tendency tells anything about the ratio to come.
When the Resin Comes In
In flower the two packs begin to give clues, and most of the clues mislead. Resin coverage is the first one a grower judges, and it used to be a fair guide: first-generation CBD-dominant lines carried markedly less frost than their THC counterparts, a inheritance from hemp. Current lines have mostly erased that gap, and a less frosted plant from the 20:1 pack may still come in exactly where the foil said. Resin density and chemotype are carried separately.
Smell is an even poorer guide. The terpene profile lives on still other genes, so the THC-dominant plant sitting in the balanced pack can be identical to the balanced one beside it, and either can be identical to a plant from the 20:1 pack. People who try to separate a balanced pack by nose in week eight are right about half the time, which is not any better than leaving the plants sorting at all.
Stage Five: The Harvest Window
At this stage the two packs diverge in a way that favours the grower of the 20:1 pack and also the CBD-dominant plants sitting in the balanced pack. CBDA breaks down more slowly than THCA, so a CBD-dominant plant allowed a week beyond its ideal point retains most of its cannabinoid content, whereas a THC-dominant one in the same conditions has already begun shedding THC to CBN. The usual trichome rules nonetheless applies; it holds on account of the terpenes, which fade on any plant whatever the chemotype, and a late, over-dried CBD flower tastes of little whatever the test result says.
Stage Six: The Jar
The 20:1 pack goes into one jar. Every plant in it carries roughly the same ratio, and mixing them changes nothing worth measuring. The balanced pack cannot be treated the same way. Pool its 10 plants in a single jar and the result become a mixture that nobody’s foil ever promised, skewed by whichever plants grew biggest, and no subsequent test can pull apart what went in.
The discipline that saves the trouble is almost tedious: cut the balanced pack plant by plant, cure every one apart, number each, and test them one at a time rather than after anything is combined. This is the one point in the whole grow at which the three chemotypes of plant in the balanced pack can yet be told apart without a lab, and only because every one is at that moment in its own container.
What a Certificate Shows
Submit a few grams from every jar to a laboratory and the two packs finally are legible. For the 20:1 pack the reports come back clustered tightly around the stated ratio, differing mainly in total cannabinoid content not in proportion. For the balanced pack they come back in three clusters: some reports showing almost all THC, some showing almost all CBD, and the rest somewhere near one to one. Nothing of this result is a defect; it is the breeder’s cross written out as numbers.
Over-the-counter test kits are sold for growers without a laboratory, and most detect whether THC is there rather than how much. That is sufficient to separate the THC-dominant jars out of a balanced pack and insufficient to put a ratio to the rest, and that matches the most frequent use: knowing which of the ten jars will catch out a guest.
Where the Law Reads the Numbers
The last stage where the two packs separate is legal, and it catches growers who thought “CBD” meant “hemp”. The majority of countries classify hemp by a THC limit, a fraction of a percent of dry weight, with the exact number varying by country and sometimes over time. A plant from the 20:1 pack producing twenty percent CBD at twenty to one also makes about one percent THC, and that is many times over the majority of limits. Certified hemp lines are bred to keep total cannabinoid output down so the THC fraction stays under the line at harvest; CBD seed lines are selected for rich content and let the THC rise with it. A shop that offers only a ratio is describing a flower line; a grower who requires a legal hemp crop needs to ask for a tested THC figure at harvest and buy no line that cannot provide one.
Beyond the threshold issue, the word on the foil changes nothing about the law on the seed as such. In places where holding cannabis seeds is permitted and germinating them is not, the balanced pack and the 20:1 pack fall under the same rule as any other pack. In places where the plant is permitted outright, the choice between them is a matter of preference and nobody else’s. None of this article is legal advice, and the rule which applies is the one in the place the seed will be sown, rather than the one in the place it was bought.
English 
Turkish