CBD flower: what it is, composition, THC threshold, and usage

CBD dry herb consists of dried female flower clusters of hemp, specifically Cannabis sativa L. The flowers of this plant accumulate cannabinoids in glandular hairs called trichomes, and fiber varieties have been cultivated to dominate in cannabidiolic acid rather than tetrahydrocannabinolic acid (Frontiers in Plant Science, Andre 2016). This guide explains what the dry herb is made of, what it really contains, where Polish law draws the line between fiber hemp and cannabis other than fiber, and what research indicates about the use of dry herb. We stick to what can be verified in publications and legal texts. Where popular numbers are not supported by sources, we state this directly instead of repeating them.

KEY INFORMATION
- CBD dry herb consists of dried female flower clusters of Cannabis sativa L. from fiber varieties, where cannabidiolic acid predominates (Andre 2016).
- The Polish threshold of 0.3% applies to the plant, not the final product, and is the sum of delta-9-THC and THCA, rounded to one decimal place (Article 4, point 5 of the Act on Counteracting Drug Addiction).
- Acidic forms of cannabinoids convert to neutral forms under heat, which is why raw flower and flower after vaporization have two different profiles (Andre 2016).
- In the validation of five vaporizers at 210 degrees Celsius, the recovery of cannabinoids in vapor ranged from 45.9% to 82.7% depending on the device, and the decarboxylation efficiency in electric devices exceeded 94% (Lanz 2016).
- The only route of administration of CBD with reliably measured absolute bioavailability in humans is the inhalation route, around 31%; there are no such measurements for oral and sublingual routes (Millar 2018).

What exactly is CBD flower?

CBD dry herb consists of dried female flower clusters of hemp from fiber varieties, where the predominant cannabinoid is cannabidiolic acid (CBDA), not tetrahydrocannabinolic acid (THCA). This division is not marketing: THCA predominates in narcotic-type cannabis, while CBDA is found in fiber hemp (Frontiers in Plant Science, Andre 2016).

Botanically, it refers to one species. The former division into Sativa and Indica described more the plant's growth habit and geographical origin than distinct taxa. What distinguishes CBD dry herb from marijuana is the result of decades of selection: one breeding line moved towards fiber and cannabidiol, while the other moved towards tetrahydrocannabinol.

Cannabinoids are produced and accumulate in the secretory cavity of glandular trichomes, which mainly occur in female flowers and in smaller amounts in other above-ground parts of the plant. Terpenes are also produced there, which is why a positive correlation has been observed between terpene levels and cannabinoid levels under standardized growing conditions. This relationship has not been confirmed in a broader sample of material from various sources (Andre 2016).

Hence a practical conclusion for the reader: two packages with the same percentage declaration do not have to smell or act the same. The content of active compounds depends on the part of the plant, its age, strain, growing conditions, harvest time, and storage method. These are six variables, of which the label usually provides only one.

How is CBD dried flower produced from cultivation to packaging?

The journey from plant to package has five stages: cultivation, harvesting, drying, curing, and packaging. At each stage, what ultimately ends up in the jar changes, as the concentration of cannabinoids depends, among other things, on the harvest time and storage conditions (Andre 2016). This is why two batches of the same strain can differ significantly.

In cultivation, the grower controls the lighting, humidity, and nutrition of the plant. In field cultivation, these parameters are determined by the season, in protected cultivation they are partially controlled, and in indoor cultivation, the grower is fully responsible for them. None of these methods is inherently better: they differ in repeatability and cost, not in quality inherent in the method.

The moment of harvest is assessed by the grower by examining the trichomes under a magnifying glass. The harvest time is one of the factors that determine the concentration of cannabinoids in plant material, alongside plant age and strain (Andre 2016). After cutting, the flower clusters dry in a dark, ventilated room until the central stem becomes brittle, while the flowers remain flexible.

Curing is the maturation in closed jars for several weeks at controlled humidity. The jar is opened regularly to exchange air. After this stage comes trimming, which is the cutting of protective leaves, and finally packaging. Light-protective packaging is practically significant, as storage conditions are one of the factors affecting cannabinoid content (Andre 2016).

What else is in the dried flower besides cannabidiol?

Dry herb is a phytochemical matrix, not a single molecule. Besides cannabinoids, it contains terpenes and phenolic compounds. About twenty flavonoids have been identified in cannabis, mainly from the subclasses of flavones and flavonols, including canaflavin A and canaflavin B, methylated isoprenoid flavones not found in other plants (Frontiers in Plant Science, Andre 2016).

Cannabinoids are usually divided into ten subclasses. THCA and CBDA are the most abundant, followed by cannabinolic acid. Next are cannabigerolic acid, cannabichromenic acid, and cannabinodiolic acid. Cannabichromenic acid predominates in young plants, and its proportion decreases with maturation. Monoterpenes dominate in the volatile aroma profile of the flower, ranging from 3.1 to 28.3 mg per gram of dry flower mass (Andre 2016).

The repeated image of cannflavins A as a compound "thirty times stronger than aspirin" found on the internet has no basis in this source. The paper describes the mechanism, namely the inhibition of microsomal prostaglandin E2 synthase and 5-lipoxygenase, without comparing the strength of action to that of a painkiller. We removed the statement with the multiplier instead of looking for a citation for it.

What is the entourage effect and has it been proven?

The entourage effect refers to the hypothesis that compounds accompanying cannabinoids modify their effects. The paper most texts about cannabis refer to today conditionally formulates this synergy: its author writes that phytocannabinoid-terpenoid synergy, if proven, increases the chances of developing new therapeutic products, and proposes methods for studying it in future experiments (British Journal of Pharmacology, Russo 2011).

This distinction matters because the same paper is cited in Polish internet as evidence of synergy, often under the formula "Russo and Mechoulam." There is one author. Raphael Mechoulam appears in the paper as the researcher who isolated and synthesized tetrahydrocannabinol in 1964, not as a co-author of the review.

What does this review actually state? That the contribution of cannabidiol to the pharmacology and analgesic effects of cannabis has been scientifically demonstrated, that terpenoids inhaled from the surrounding air affect the behavior of animals and even humans, at serum concentrations of single nanograms per milliliter, and that there are grounds to treat non-cannabinoid components of the plant as potential counterweights to the intoxicating effects of THC. These are three different levels of certainty, not one.

The mechanism itself has a biological basis. Terpenes and cannabinoids are produced in the same glandular trichomes, which are epidermal outgrowths covering the leaves, flowers, and stems of the plant, described in the literature as factories of phytochemicals (Andre 2016). This same review indicates, citing earlier works, that flavonoids may influence the pharmacokinetics of THC by inhibiting liver cytochrome P450 enzymes. However, the suggestion to create extracts combining cannabidiol with terpenes remains at the stage of a research proposal, not recommendations.

How does CBD flower differ from marijuana?

The difference comes down to the ratio of the two cannabinoids and the legal status of the plant's definition. An analysis of 38,681 samples of confiscated plant material in the United States showed an increase in the average THC content from about 4% in 1995 to about 12% in 2014, with a decrease in CBD content from an average of about 0.28% in 2001 to below 0.15% in 2014 (Biological Psychiatry, ElSohly 2016).

The THC to CBD ratio changed during this period from fourteenfold to about eightyfold. This is the exact opposite of the direction in which industrial hemp is being selected. CBD flower and marijuana look similar because they are the same plant, but their chemical profiles are divergent, not similar.

At the pharmacological level, the difference is equally clear. Tetrahydrocannabinol is a partial agonist of CB1 and CB2 receptors, binding more strongly to the CB1 receptor, which is responsible for the psychoactive effect. Cannabidiol behaves differently: in cells and tissues expressing CB1 and CB2 receptors, it unexpectedly shows high efficacy as an antagonist of their agonists (British Journal of Pharmacology, Pertwee 2008).

It is worth noting that hemp flower contains trace amounts of THC, and that is enough to affect the result of a drug test. We will return to this in the section on studies, as this is the only area where "trace" does not mean "insignificant."

How does flower differ from hemp seeds and hemp seed oil?

These are two different raw materials from the same plant, and confusing them leads to incorrect conclusions about cannabinoid content. The level of phytocannabinoids in hemp seeds, and thus in seed oil, should be very low, as the seed kernel itself contains only trace amounts of THC and CBD. Higher concentrations of THC are found on the outer surface of the seed coat, likely due to contamination with leaves and flowers during harvesting (Frontiers in Plant Science, Andre 2016).

This is where separate food regulations come from, expressed not in percentages but in milligrams per kilogram. For hemp seeds and products processed from seeds, the highest permissible level is 3.0 mg/kg, and for hemp seed oil, it is 7.5 mg/kg. The level refers to the sum of delta-9-THC and delta-9-THCA, expressed as delta-9-THC. The basis is Annex I of Commission Regulation (EU) 2023/915, applicable since May 25, 2023.

The practical consequence is that food products made from hemp seeds and flower buds are subject to two separate numerical regimes. The first measures contamination of finished food in milligrams per kilogram, while the second defines the plant itself in terms of the percentage of dry mass of flower tops. Transferring one value to another context yields a result devoid of meaning.

For the reader, this means one more thing: the packaging of hemp seed oil does not describe a product with cannabidiol action, even if the trade name suggests otherwise. Oil pressed from seeds and extract from flower buds are two different things, even though both are often sold under the banner of hemp oil.

How much dried flower fits in the chamber and how many sessions can you get from a gram?

The chamber of a portable vaporizer typically holds between 0.1 to 0.15 g of ground dried flower, so one gram yields about six to ten sessions. With a larger fill, around 0.2 g, a gram lasts for five. This is a conversion that translates the price per gram into the cost of a single use.

Two factors influence this calculation. The degree of grinding: finely ground material packs more tightly, so more can fit into the same chamber. And the number of draws on a single load, as the dried flower releases cannabinoids gradually, and after a few puffs, the vapor becomes noticeably poorer.

For clarity: the above refers to vaporization, which is the method this text describes first. With a joint, the calculation is different, as a classic portion holds 0.3 to 0.5 g, meaning two or three can be made from a gram.

What is the THC threshold in Poland and how is it calculated?

Industrial hemp refers to plants of the species Cannabis sativa L., in which the total content of delta-9-THC and tetrahydrocannabinolic acid in the flowering or fruiting tops, from which resin has not been removed, does not exceed 0.3% when calculated on a dry mass basis. The sum is rounded to one decimal place. The basis is Article 4 point 5 of the Act of July 29, 2005 on counteracting drug addiction (t.j. Dz.U. 2023 poz. 1939), as amended by the Act of March 24, 2022 (Dz.U. 2022 poz. 763), in force since May 7, 2022.

Three things in this sentence are regularly misrepresented. First, the threshold applies to the plant, not the final product on the shelf. Second, it is counted as the sum of delta-9-THC and THCA, not just delta-9-THC, which changes the result of the laboratory test. Third, the basis is no longer the original announcement of the 2005 Act, but its consolidated text in the cited wording. We discuss more about tetrahydrocannabinolic acid in the entry about THCA and its difference from THC.

The national threshold corresponds to the EU threshold, but it does not derive from it. These are two separate regulations with the same numerical value. On the EU side, since January 1, 2023, cannabis varieties eligible for support under the Common Agricultural Policy may contain up to 0.3% THC, based on Regulation (EU) 2021/2115; previously, the EU threshold was 0.2% based on Regulation 1307/2013, repealed on the same day.

A separate issue is the status of cannabidiol itself. In the consolidated text of the list of psychotropic substances, narcotic drugs, and new psychoactive substances (Dz.U. 2024 poz. 1139) neither the word "cannabidiol" nor "cannabigerol" nor "cannabinol" appears. The amendment to the Act on counteracting drug addiction, which comes into force on August 27, 2026, does not change the THC threshold, the classification of substances, or the rules of retail sale. The conditions of cultivation itself are described in a separate text about the legal cultivation of industrial hemp in Poland.

Jakie odmiany suszu CBD spotkasz w Polsce?

The table refers to availability, not cannabinoid content, and intentionally does not include a price column: the assortment changes faster than the article.

On the Polish market, flower is sold under trade line names, not under substance names. In the u Bucha store catalog, the flower category today includes lines such as Northwest, Midwest, Autopower, Santhica, and Pineapple Express, in packages ranging from one to ten grams (as of August 10, 2026). This is verifiable information about availability, not about cannabinoid content.

The percentages declared on labels should be treated as a starting point for checking the certificate, not as a guarantee. The reason is measured on European material: in the analysis of fourteen commercial CBD oils available in EU countries, nine samples had concentrations significantly deviating from the declared values, while five were within reasonable limits (Molecules, Pavlovic 2018). The study concerned oils, but it speaks to the same market and the same regulatory gap.

Strain names also say something about the aroma profile, as terpenes are produced in the same trichomes as cannabinoids. However, they do not say anything certain about potency, as the relationship between terpene levels and cannabinoid levels has only been confirmed under standardized growing conditions, and not on material from different sources (Andre 2016).

Prices in the flower category at the u Bucha store today range from 25 to 140 PLN, with 34 items differing in weight and line (as of August 10, 2026). We provide a range for the entire category, not the price of a single package, as the catalog changes faster than the article.

How is CBD flower used?

The best-documented method is vaporization, which involves heating the herb without combustion. In an in vitro validation of five commercial vaporizers at a temperature set to 210 degrees Celsius, the recovery of total CBD in the vapor ranged from 51.4% to 70.0% for electric devices, while the recovery of total THC ranged from 54.6% to 82.7%. The effectiveness of decarboxylation exceeded 97.3% for THC and 94.6% for CBD (PLoS One, Lanz 2016).

These numbers describe how much substance the device releases into the vapor, not how much is absorbed by the body. This distinction is important because both concepts are often mixed in the body of texts about cannabis. In the same study, a gas-powered device yielded a lower recovery and combustion of plant material was observed, which is exactly what vaporization aims to avoid.

Heating does one more thing: it converts acidic forms of cannabinoids into neutral forms. This process also occurs naturally in the plant, but to a much greater extent after heating the harvested material (Andre 2016). Therefore, fresh, unheated flower primarily contains CBDA, not CBD, and this is why an infusion made from raw herb has a different composition than vapor from a vaporizer.

Alternatives include infusions and homemade fat extracts, but nothing certain can be said about their absorption today, which we discuss in the next section. Vaporization equipment in the u Bucha category costs from 374 to 499 PLN with five available options (as of August 10, 2026). We elaborate on temperature selection in the text about vaporization temperatures of herbs and cannabis.

Does the herb work differently than CBD oil?

There is currently no complete numerical answer to this question, and it's worth stating this clearly. A systematic review of the pharmacokinetics of cannabidiol in humans included 24 studies and showed that absolute bioavailability was reliably measured only for the inhalation route, where it was 31%. For the oral and sublingual routes, no study attempted such measurement, despite the availability of intravenous formulations (Frontiers in Pharmacology, Millar 2018).

The four-column tables comparing oral, sublingual, and inhalation bioavailability circulating on Polish internet have no basis in data. However, the same review provides verified facts: the half-life ranges from 1.4 to 10.9 hours after a spray on the oral mucosa, about 31 hours after smoking, and from 2 to 5 days after chronic oral administration. Maximum concentration is reached faster after inhalation than after oral administration.

The practical consequences are twofold. First, a meal alters absorption: the area under the curve and maximum concentration increase after eating and in fat formulations. Second, comparing milligrams between the inhalation and oral routes is inherently unreliable, as there is no reference point for one of them.

This leads to a simple editorial principle that we apply here: we describe what has been measured and on whom, rather than converting doses between product forms. The choice between herb and oil is therefore a matter of convenience and timing, not a choice of a 'stronger' form.

How to choose good herb and what is a certificate of analysis for?

A certificate of analysis is the only document that turns a label declaration into data. The need for such a document arises from measurement, not caution: nine out of fourteen commercial CBD oils from the European market had contents significantly deviating from what was declared, and the authors directly indicated the lack of uniform regulation as the cause (Molecules, Pavlovic 2018).

A document worth reading provides the cannabinoid profile, terpene profile, contamination test results, and laboratory data along with the analysis date and batch number. Without a batch number, the certificate describes a different product than the one in the package, even if everything else matches.

Beyond the document, the physical condition of the product matters. Too dry flower crumbles and loses volatile terpenes, while too moist promotes mold. The harvest or curing date says more than the packaging date itself, as cannabinoid content also depends on storage conditions and time (Andre 2016).

It's also important to know what the certificate does not clarify. It does not indicate how the product will act, as no chemical analysis measures this. It does not predict how the batch will change after a few months in a non-airtight package. Finally, it does not replace information on whether the seller tests each batch or publishes one document for the entire product line. Therefore, the question about the batch number on the certificate is a question about the control system, not about a single piece of paper.

How to store herb so it doesn't lose its properties?

Three factors that degrade herb are light, heat, and oxygen. Storage conditions are directly mentioned among the variables affecting cannabinoid concentration in plant material, alongside the age of the plant and the harvest date (Frontiers in Plant Science, Andre 2016). Therefore, storage is not an addition to quality, but a part of it.

A practical standard is an airtight, opaque container, a cool place without temperature fluctuations, and a humidity regulator inside. Glass is chemically inert and does not absorb odors, making it better than a ziplock bag, where trichomes stick to the walls.

A refrigerator can be a bad idea due to condensation of water vapor with each opening. Long-term freezing is possible, but trichomes become brittle and more easily detach from the flower during transfer.

• A ziplock bag instead of a container: static adherence of trichomes and lack of protection from light.
• A transparent jar on the windowsill: direct light accelerates the degradation of volatile compounds.
• Grinding the entire package at once: increased surface area in contact with oxygen for the entire supply.
• Frequent opening of the container: each air exchange is another dose of oxygen.
• Storing next to coffee or spices: foreign aromas penetrate the plant material.

Storage accessories in the u Bucha category cost from 4.50 to 189 PLN with eight items, from humidity regulators to containers with hygrometers (as of August 10, 2026). We provide a price range because a single price will become outdated faster than this text.

What does science say about the effects and risks of CBD herb?

The best-documented area of research on cannabidiol is anxiety disorders, but the scope of this evidence is narrower than marketing suggests. A review encompassing preclinical and experimental work as well as clinical and epidemiological studies states that preclinical data strongly support anxiolytic effects, while evidence in humans is limited to single doses, and there are few studies in clinical populations (Neurotherapeutics, Blessing 2015).

On the safety side, a review of clinical and animal data indicates that the most common adverse effects are fatigue, diarrhea, and changes in appetite and body weight. The same review notes that the impact of cannabidiol on liver enzymes and drug transporters requires further clinical studies, as cannabidiol is sometimes used as an adjunct therapy (Cannabis and Cannabinoid Research, Iffland 2017).

The latest European stance is more cautious than what circulates on the internet. The EFSA panel derived a provisional safe dose of 0.0275 mg per kilogram of body weight per day, which is about 2 mg per day for a person weighing 70 kg, with an uncertainty factor of 400. This is a safety ceiling, not a recommendation, and applies only to supplements with a cannabidiol purity of at least 98%, without nanoparticles. The safety of cannabidiol cannot be established in individuals under 25 years of age, in pregnant and breastfeeding women, and in those taking medications. (EFSA Journal, 2026).

A separate risk is the result of a drug test. After administering pure cannabidiol, only 1 out of 218 urine samples tested positive in the screening at a threshold of 20 ng/ml, and none exceeded the confirmatory threshold of 15 ng/ml. After inhaling vaporized cannabis with a predominance of cannabidiol, containing 3.7 mg of delta-9-THC, nine samples tested positive in the screening, and four confirmed above the threshold (Journal of Analytical Toxicology, Spindle 2020).

Which myths about CBD flower have no basis in sources?

Several claims have accumulated around the flower, repeated so often that they sound like basic knowledge. The table below compares them with what can be read from verified publications. Some of them were previously in this article without a verifiable source and have been removed.

The principle that organizes this list is simple: a numerical claim without a specified study does not become true through repetition. Sentences removed from this text provided market value, customer store percentages, and potency multipliers, none of which are confirmed by any available publication.

What is worth remembering about CBD flower?

CBD flower is dried female flower clusters of industrial hemp strains, in which cannabidiolic acid predominates. It is produced through cultivation, harvesting at the maturity of trichomes, drying, curing, and packaging, and each of these stages changes the content of active compounds. The label provides one parameter, the certificate of analysis provides several, and it is the latter that decides.

The law sets the boundary at the plant level, not the product: industrial hemp consists of plants in which the sum of delta-9-THC and THCA does not exceed 0.3% dry weight in the flowering or fruiting tops. Cannabidiol is not listed among controlled substances, and the amendment of August 27, 2026 does not change anything in this regard.

Regarding usage, the strongest data pertains to vaporization and comes from device validations, not absorption measurements. The absolute bioavailability of cannabidiol has been measured in humans only for the inhalation route. Therefore, milligram comparisons between flower and oil are based on data that does not exist.

For the same reason, it is worth reading statements about the entourage effect cautiously. The review cited by the market describes the phytocannabinoid-terpenoid synergy as a hypothesis requiring proof and proposes methods for its study, rather than as an established mechanism. However, the same work states directly that the contribution of cannabidiol to the pharmacology of cannabis has been demonstrated. Distinguishing these two levels of certainty is what separates source-based descriptions from advertising slogans.

Finally, caution that is not a formality. The safety of cannabidiol cannot be established in individuals under 25 years of age, in pregnant and breastfeeding women, and in those taking medications. Individuals subjected to sobriety checks should consider that products with a predominance of cannabidiol but containing trace THC can yield a positive urine test result.

Frequently Asked Questions

What is CBD dried flower and what is it made from?

These are dried female inflorescences of industrial hemp from fiber varieties. Cannabinoids and terpenes are produced in the secretory cavity of glandular trichomes, mainly found in female flowers. In fiber hemp, cannabidiolic acid predominates, while in narcotic-type hemp, tetrahydrocannabinolic acid predominates (Andre 2016).

How is the 0.3% THC threshold calculated in Poland?

As the sum of delta-9-THC and tetrahydrocannabinolic acid in the flowering or fruiting tops from which resin has not been removed, calculated on a dry weight basis and rounded to one decimal place. The threshold applies to the plant, not the final product (art. 4 point 5, Dz.U. 2023 poz. 1939).

Is cannabidiol a controlled substance in Poland?

No. The uniform text of the list of psychotropic substances, narcotics, and new psychoactive substances (Dz.U. 2024 poz. 1139) does not contain the word "cannabidiol." It also does not contain the words "cannabigerol" and "cannabinol." The list itself includes other groups of compounds.

How many cannabinoids does a vaporizer release?

In in vitro validation at 210 degrees Celsius, the recovery of total CBD in vapor ranged from 51.4% to 70.0% for electric vaporizers, while the recovery of total THC ranged from 54.6% to 82.7%. The decarboxylation efficiency exceeded 94.6% for CBD (Lanz 2016). This is vapor recovery, not absorption.

Does the dry herb work stronger than CBD oil?

This cannot be resolved numerically. The absolute bioavailability of cannabidiol has only been measured in humans for the inhalation route and was found to be 31%; no studies have performed such measurements for the oral and sublingual routes (Millar 2018). Percentage comparisons between forms are not supported by data.

Can CBD flower yield a positive drug test result?

Maybe, if it contains trace THC. Of pure cannabidiol, only 1 out of 218 urine samples tested positive in screening, and none confirmed it. After vaporizing cannabis with a CBD predominance and 3.7 mg THC, nine samples were positive in screening, four confirmed (Spindle 2020).

Who should not use products containing cannabidiol?

The EFSA panel stated that the safety of cannabidiol cannot be established for individuals under 25 years of age, for pregnant and breastfeeding women, and for those taking medications simultaneously. A provisional safe dose, around 2 mg per day for 70 kg, is a ceiling, not a recommendation (EFSA 2026).

How to store dry herb so it doesn't lose quality?

In a sealed, opaque container, in a cool place without temperature fluctuations, with a humidity regulator inside. Storage conditions are directly listed among the factors affecting cannabinoid content in plant material, alongside strain, plant age, and harvest time (Andre 2016).

This article is for informational and educational purposes only and does not constitute medical advice. Before starting to use hemp or CBD for therapeutic purposes, consult your doctor, especially if you are taking other medications, are pregnant, or breastfeeding.

You can find the current offer of flower with certificates of analysis in the category dried hemp in the u Bucha store.

Author: Michał Waluk · Opublikowano: 2026-05-04 · Aktualizacja: 2026-08-24