Every grow forum has its rituals. Here are the popular ones the evidence doesn't back, each with a verdict, the one-line reason, and the full article with its sources. Where nobody knows yet, it goes on the list of open trials instead.
New to the jargon? The glossary defines 718 terms, from flushing to foxtails.
Putting plants in 24–72 hours of darkness before the chop is a myth, and the founder's verdict is "complete and utter nonsense". Why switch off photosynthesis while the plant is still finishing its resin?
For more than 20 years he has offered a standing challenge: find a peer-reviewed study that shows a benefit (not a single-plant study, not biased or skewed) and a 50-pack of seeds is yours, no questions asked.
Labelled Myth on the GenetixBay evidence ladder: widely believed, not supported by evidence. Follow a card to the article for the studies.
Myth: “Cannabis is much stronger than it was 20 (or 50) years ago”
Verdict: Busted. False as a claim about the genetics. Hashish, charas and sinsemilla traditions are centuries old and impossible with 5 % plants. The 'weak old weed' numbers measured seized, degraded, exported brick, not the best of what was grown
The evidence: Old cannabis wasn't weak: the "so much stronger than 20 years ago" myth →Myth: “Most shelf weed is 30 %”
Verdict: Busted. Independent retests find most retail flower in the mid-teens to low 20s, often well below its label. Reaching 30 % total cannabinoids is a rare, real feat
The evidence: Buyer beware: potency labels, strain names and other claims that don't hold up →Myth: “Flower can test 35 %, even 42 %, total cannabinoids”
Verdict: Busted. Not credible: cannabinoids are made only in trichome heads and bud is mostly bract and stem. Numbers like that come from concentrates, lab shopping or inflated testing
The evidence: Buyer beware: potency labels, strain names and other claims that don't hold up →Myth: “Humidity packs keep your stash fresher”
Verdict: Busted. A marketing gimmick: the only pro-pack data is the manufacturer's own. A good cure in a full, airtight, dark jar does the job
The evidence: Buyer beware: potency labels, strain names and other claims that don't hold up →Myth: “Frost and purple mean potency”
Verdict: Busted. Frost is how many trichome heads you can see, not how full they are; gland density didn't predict THC in a field study, and consumers' potency ratings didn't match measured THC. Purple and red are anthocyanins, set by genetics and cold, with their own temperature optimum separate from cannabinoids
The evidence: Buyer beware: potency labels, strain names and other claims that don't hold up →Myth: “Autos are easy”
Verdict: Busted. Autos run on a strict countdown from germination, so any stress or mistake costs yield they can't recover. They're good for beginners because they quickly show who has a green thumb, not because they're forgiving
The evidence: Photoperiod vs autoflower, and how autoflowering is inherited →Myth: “UV-B lamps raise THC”
Verdict: Busted. Controlled trials found UV made little or no difference to cannabinoids, and high doses can cut yield
The evidence: Light spectrum: blue, red, far-red and UV, what's real →Myth: “Cold nights boost terpenes and resin”
Verdict: Busted. Cold can bring out purple colour (anthocyanins) in cultivars that carry it. More terpenes, flavour or resin from cold has no peer-reviewed support
The evidence: Temperature by stage: day, night and root-zone targets →Myth: “Day 1 of 12/12 is day 1 of flower”
Verdict: Busted. After the flip the shoot tip needs days to rebuild itself into an inflorescence; in controlled studies the first proper pistil clusters appeared about 8–14 days after short days began, and later in slow cultivars
The evidence: The flip isn't day 1 of flower: the 10–14 day transition and how to count it →Myth: “High-phosphorus bloom boosters mean bigger buds”
Verdict: Busted. Four independent cannabis trials found a plateau: past roughly 25–60 mg/L P, more phosphorus didn't raise yield or cannabinoids
The evidence: "Bloom boosters" for cannabis: what's real and what's marketing →Myth: “LED lights make plants need Cal-Mag”
Verdict: Busted. LEDs don't create a Cal-Mag need. Demand is driven by cultivar, RO or soft water, coco's cation exchange and root-zone pH
The evidence: Cal-Mag: what it is, when you need it and when you don't →Myth: “A pre-harvest flush 'cleans' the plant of nutrients”
Verdict: Busted. Plain water can't pull stored minerals back out of tissue. The only valid flush treats the medium (salt build-up), not the plant
The evidence: Flushing before harvest: myth (summary) →Myth: “Molasses in the reservoir sweetens and fattens buds”
Verdict: Busted. Sugars feed soil microbes, not the plant, which makes its own by photosynthesis. In mineral hydro they just feed slime
The evidence: Per-element feeding tricks: what growers adjust, stage by stage →Myth: “More sulfur means more terpenes”
Verdict: Busted. Terpenes contain no sulfur. Once S is sufficient there's no mechanism for extra S to make more of them
The evidence: Per-element feeding tricks: what growers adjust, stage by stage →Myth: “Late-flower bananas are normal”
Verdict: Busted. Late 'nanners' are staminate flowers (anthers) forming inside a female's buds: that is intersex expression, a herm. Sex expression is heritable, and stress only reveals the plants that carry the weakness
The evidence: Hermaphrodite cannabis (bananas and nanners): what to do →Myth: “A herm is fine if it's the best plant you've grown”
Verdict: Busted. Its pollen makes all-female seed that carries the same tendency. Keep it and you spread the problem; cull it and don't breed from it
The evidence: Hermaphrodite cannabis (bananas and nanners): what to do →Myth: “Two-way humidity packs make a better cure”
Verdict: Busted. A marketing gimmick: the only data that says packs help comes from a pack maker's own test. Cure by the bud's water activity, and add a fresh bud if a jar goes too dry
The evidence: Curing and burping: jars, humidity and how long →Myth: “Irradiated weed is radioactive”
Verdict: Busted. Gamma from cobalt-60, e-beam up to 10 MeV and X-ray up to 5 MeV (7.5 MeV with gold or tantalum targets) don't make the product radioactive, the same as irradiated spices. The real questions are terpenes, mycotoxins and disclosure
The evidence: Irradiated cannabis: gamma, e-beam, X-ray, ozone, RF and what they do to your weed →Myth: “Irradiation has no effect on terpenes”
Verdict: Inconclusive. Some studies found no significant change. Others measured 10–20 % losses in volatile monoterpenes (up to 38 % for one compound) right after treatment. The effect is small and real. Nobody has shown it's harmless to aroma, and nobody has shown it ruins it
The evidence: Irradiated cannabis: gamma, e-beam, X-ray, ozone, RF and what they do to your weed →Myth: “A passing retest means the mould problem is gone”
Verdict: Busted. Irradiation and other kill steps reduce the count of living spores. Toxins the mould already made, and the dead spores themselves, can stay. One small study still found mycotoxins and viable Aspergillus and Penicillium after gamma treatment
The evidence: Irradiated cannabis: gamma, e-beam, X-ray, ozone, RF and what they do to your weed →Myth: “Flushing with plain water before harvest makes smoother, better-tasting buds”
Verdict: Busted. Cannabis stores what it takes up; water at the end doesn't wash it out. Controlled studies found no quality gain, and starving the plant while it finishes costs yield and resin
The evidence: Pre-harvest flushing: a myth that costs you yield and resin →Myth: “24–72 hours of darkness before harvest boosts resin and THC”
Verdict: Busted. Why switch off photosynthesis while the plant is finishing? No credible study shows a benefit, and the founder's 20-year challenge is still unclaimed
The evidence: Trichome ripeness: clear, cloudy, amber, and what the evidence says →Myth: “Amber trichomes mean CBN and couch-lock”
Verdict: Busted. CBN forms mainly by oxidation after harvest, not on the plant. Amber marks ageing glands, not a different high
The evidence: Trichome ripeness: clear, cloudy, amber, and what the evidence says →Myth: “Crossing two famous cuts makes a new strain”
Verdict: Busted. Two heterozygous clones give a segregating, untested F1 population, not a uniform or stable strain. A strain is what's left after years of selection and testing
The evidence: Breeders vs pollen chuckers: what real cannabis breeding looks like →Myth: “Only the females matter in breeding”
Verdict: Busted. Half of every seed's genes come from the father. Selecting only the mother halves the response to selection, and an unselected male is a gamble on half the genome
The evidence: Breeders vs pollen chuckers: what real cannabis breeding looks like →Myth: “A 10-plant test grow proves a line is herm-free”
Verdict: Busted. Ten clean plants can't tell 0 % from 20 %: a line with a 1-in-5 herm rate shows zero herms in 10 plants about 11 % of the time. Claims of under 2 % need about 150 plants
The evidence: Breeders vs pollen chuckers: what real cannabis breeding looks like →Myth: “If it has the right name, it's the real cut”
Verdict: Busted. Same-named cuts from different sources are often genetically different; only a documented chain of custody plus a DNA comparison settles it
The evidence: Elite clone-only gatekeeping: why the classics live in a few hands →Myth: “Legal cannabis is clean because it's tested”
Verdict: Busted. Regulators have recalled legal flower for aspergillus, failed microbial limits and banned pesticides, and private retests have found residues on licensed shelves. Testing reduces risk; it doesn't guarantee it
The evidence: Craft vs industrial cannabis: did legalisation's commercial model hurt quality? →Myth: “Indica = couch, sativa = energy, and they're different species”
Verdict: Busted. One species, Cannabis sativa, showing different phenotypes. Nearly everything sold is a hybrid, and the labels don't predict chemistry or effects. At most they describe plant shape
The evidence: Indica, sativa and ruderalis: what the names really mean →Myth: “Different names mean different plants”
Verdict: Busted. Genotyping has found differently named retail samples with identical genotypes, and one state's 637 recorded names collapsed to three chemical profiles. A name is a label, not a genotype
The evidence: Same cut, a thousand names: renaming, relabelling and the shrinking gene pool →Myth: “A new name means new genetics”
Verdict: Busted. Renaming a cut or a reselection costs nothing and changes nothing in the plant. Only a documented cross, a grow-out or a DNA comparison shows something is new
The evidence: Same cut, a thousand names: renaming, relabelling and the shrinking gene pool →Myth: “If it has the famous name, it's the famous cut”
Verdict: Busted. Studies of same-named retail samples find genetic outliers in most names. Without a chain of custody or a DNA match to a reference sample, 'the original cut' is a claim
The evidence: Same cut, a thousand names: renaming, relabelling and the shrinking gene pool →Myth: “A strain name tells you what genetics you're getting”
Verdict: Busted. Genetic studies of retail cannabis show the same name often hides different genotypes. A name is a claim; documented lineage and DNA are the evidence
The evidence: Why strain names are unreliable: what genetic studies show →Not myths to bust, but arguments growers have every week. Here is what the evidence actually shows, and what GenetixBay does about it.
The flip isn't day 1 of flower: the 10–14 day transition and how to count it
Your breeder says 8 weeks, your plant takes 10. Nobody's lying: the clock usually starts at first pistils, not at the flip. The data on the 10–14 day transition, and how to count it.
Read the evidence →Irradiated cannabis: gamma, e-beam, X-ray, ozone, RF and what they do to your weed
A lot of legal flower gets zapped before it reaches the shelf. Most buyers are never told. Here's what gamma, e-beam, X-ray, ozone and RF actually do to terpenes, which places make anyone disclose it, and why growing your own skips the whole question.
Read the evidence →Breeders vs pollen chuckers: what real cannabis breeding looks like
Crossing two hype cuts and selling the seed untested isn't breeding. What a breeder actually does, with the arithmetic, and why it's the reason your 'feminised' pack hermed.
Read the evidence →Elite clone-only gatekeeping: why the classics live in a few hands
Some of the most important cuts in cannabis history survive in a handful of private gardens, swapped cut-for-cut or sold for thousands. Here is what the public record shows, and why GenetixBay exists to open it up.
Read the evidence →Craft vs industrial cannabis: did legalisation's commercial model hurt quality?
The founder thinks the commercial legal model was the worst thing that happened to cannabis quality. Here is the case (recalls, irradiation, price collapse, small farms priced out) and what the data don't show.
Read the evidence →Landrace hunting or biopiracy? Benefit-sharing, consent and cannabis
Nearly every modern line is built on farmers' selections, and almost none of them were ever asked, credited or paid. What the Nagoya Protocol requires, why cannabis falls through the cracks, and what fair landrace work looks like.
Read the evidence →Patents and the gene pool: who can own a cannabis plant?
Cannabis plants, traits and methods can be patented, and some are. Here are the public records, the one notable court case, the legal debate about the commons, and why open documentation is the answer.
Read the evidence →Same cut, a thousand names: renaming, relabelling and the shrinking gene pool
One state's medical lab records carried 637 strain names that boiled down to three chemical profiles. Genetic tests keep finding one plant under several names and several plants under one. Here's how renaming hides a shrinking gene pool.
Read the evidence →Why everything tastes the same: the evidence that commercial cannabis is converging
Thousands of strain names, but most commercial flower falls into a handful of terpene groups, landraces are being hybridised away, and the market pays for THC. The data, and what we do about it.
Read the evidence →Some questions nobody has settled yet, including a few where the founder has a strong hunch (LED vs HPS, hydro vs living soil, autos vs their photoperiod sisters). GenetixBay members will run them as controlled side-by-sides: pre-registered hypothesis, matched clones or a split tent, weighed dry yield and lab results on both sides. Null results get published too.
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The GenetixBay community is coming: honest grow journals, permanent GB-IDs for genetics, and a Professor who answers with citations. Founding Members get first access and the lowest numbers in the archive.
