PGR Weed Should NEVER Be Consumed and Here’s How To Spot It


Plant growth regulators (PGR) are used by profit-hungry growers and the result is a cheap, medicinally reduced, cancer-risk of a product.

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Unscrupulous growers will sometimes go to any length to increase the bottom line. The inclusion of Plant Growth Regulators (PGR) in cannabis is one such way dodgy individuals grow tight, dense nugs that fool the uninitiated. PGR weed is a real risk to the consumer and results in reduced medicinal benefits. It can even be harmful to health if consumed longterm.

What Are PGRs?

Using PGRs — or plant growth regulators — helps to control the growth of plants. In cannabis, these are a cheap additive used to fatten up buds to increase both weight and density, and hence inflate the price to deceive unwitting consumers.

PGRs greatly benefit unscrupulous growers, but much more worrying is the effect they can have on the health of consumers. There are confirmed links between adverse health effects and PGR use.

black market deal

What Are the Most Commonly-Used PGRs?

Many types of PGRs aid in the control of plant growth across many species. However, when it comes to cannabis cultivation, the three main types typically in use are paclobutrazol, daminozide, and chlormequat chloride.


Paclobutrazol is a plant growth retardant that functions as a gibberellic acid antagonist. By binding to certain enzymes, paclobutrazol reduces the ability of the plant to synthesize terpenes. It also reduces the ability of the plant to produce the all-important intoxiating compound THC.

Fewer terpenes and lower quantities of THC only serve to diminish the many medicinal properties of the cannabis plant. As a result of this the entourage effect — the synergies that play out between plant compounds — can’t take place as nature intended since all the compounds aren’t present.

But what’s of most interest to the immoral growers who use it is that paclobutrazol hinders the ability of cells to elongate. This results in cells that pack tightly for increased density and weight in the buds.

When buds which contains paclobutrazol are smoked, it breaks down into nitrosamines — the most carcinogenic compound found in cigarettes. Studies say paclobutrazol can negatively impact fertility in males as well as cause liver damage.


Back in 1999, there was a ban placed on daminozide — or alar — in consumable plants when proof emerged that is was a human carcinogen. The cultivators who use it do so for its ability to inhibit the gibberellin pathway in ornamental plants. When use on cannabis, the result is a reduction in terpene production along with a reduction in the production of major cannabinoids like THC, CBN, and CBD. In effect, there’s lower quality when it comes to the all-important resin production. So the quality of any resulting medicinal benefits becomes greatly diminished.

The chemical is used to maximize bud yield by slowing the growth of leaves and stems. It is not approved for food products and, therefore, should NOT be smoked either. Daminozide is listed as a probable human carcinogen by the EPA.

Chlormequat Chloride

Chlormequat chloride helps produce thicker stems and shorter plants. In effect, it slows down plant growth to encourage flowering. The resulting shorter bushier plants are much more adept for indoor growing. Although there is no evidence of carcinogenicity from chlormequat chloride, there are strong suspicions that it is harmful in large doses. Several documented cases of organ damage along with skin and eye irritation exist among people who were unlucky enough to ingest large amounts chlormequat chloride.

glass looking for pgr weed

How to Tell if it’s PGR Weed

Thankfully it’s quite easy for the uninitiated to spot PGR weed. One giveaway is rock-hard buds. If unattractive brown hairs cover the bud surface and said buds emit little to no scent, this isn’t good. Odds on you’ve got your hands on some PGR weed.

One notable characteristic of PGR weed is the reduced presence of trichomes — the microscopic crystals that coat the leaves and buds. They act as the all-important resin glands where much of the medicinal benefits of the plant exist. Without them, those medicinal effects simply won’t manifest as strongly.

One final feature of cannabis associated with PGRs are buds that feel spongey. The increased density of PGR weed means that the curing process doesn’t complete as it should. The result is a spongey brown bud with little to no scent that provides a poor smoke.

good cannabis

The Unintended Consequences of Black Market Cannabis

In places where cannabis remains illegal, or where testing is not yet up to speed, many patients can find themselves exposed to PGRs. As a result, many have lost the connection to what makes the quintessential cannabis experience.

It’s in everyone’s interest to ensure that medicinal cannabis users aren’t exposed to these compounds. Alongside the decreased medicinal benefits of PGR weed, this report from the National Resources Defense Council show many PGRs to be cancerous, toxic, and clearly not fit for human consumption. The only reason these exist is due to prohibition, a thriving black market, or the lack of enforced regulation in legal jurisdictions.

If someone attempts to sell you cannabis that was clearly treated with PGRs, then it’s better to go without. Aside from severely compromised medicinal benefits and the above dangers there are other side effects. Many people report paranoia, scattered thoughts, and headaches after consuming PGR weed.

Coupled with a true intention to heal, the expertise we have across the globe in holistic cultivation methods means that there’s no reason for anyone to tolerate the presence of PGRs in their weed.

The post PGR Weed Should NEVER Be Consumed and Here’s How To Spot It appeared first on RxLeaf.