What does pheno mean? Phenotypes, cuts and why one strain name can mean different plants

What does pheno mean in cannabis?

Pheno is slang for phenotype. In biology, a phenotype is the set of observable traits an organism shows, from its height and leaf shape to its chemistry. In cannabis, that usually means growth habit, how long flowering takes, how many trichomes the buds carry, what the flower smells like, and how much THC and which terpenes it makes.

When growers say "that's a nice pheno" or "I found a gassy pheno", they mean one individual plant stood out among its siblings. You'll also hear "pheno hunting", which is the process of growing many seeds and picking the plant worth keeping. Our weed slang glossary covers the rest of the vocabulary.

HybridLemon Cherry GelatoTHC 19–29% · CaryophylleneHybridRuntzTHC 19–30% · CaryophylleneHybridGelatoTHC 18–26% · CaryophylleneIndicaIce Cream CakeTHC 20–25% · CaryophylleneHybridWhite RuntzTHC 18–30% · CaryophylleneHybridBiscottiTHC 20–27% · CaryophylleneHybridLA BombaTHC 20–26% · CaryophylleneHybridGelato 41THC 20–29% · CaryophylleneHybridJealousyTHC 18–30% · CaryophylleneHybridGelonadeTHC 20–31% · LimoneneHybridGusherTHC 15–22% · CaryophylleneHybridCheetah PissTHC 18–29% · Caryophyllene

Genotype vs phenotype: what's the difference?

A genotype is an organism's genetic makeup. A phenotype is the observable result: what happens when those genes meet light, nutrients, temperature and time. The US National Human Genome Research Institute defines phenotype as an individual's observable traits, and notes that it is shaped by genes and by environment together.

That second part matters for growers. The same plant grown in two rooms can differ in size, colour and aroma, because light, feeding and curing all change what the genes can express. So a phenotype is never purely about the seed. It's the plant plus the conditions it grew in.

Why can two seeds from the same cross turn out different?

Cannabis is highly heterozygous, meaning each plant carries two different versions of many genes. When two parents are crossed, those versions are shuffled, so every seed gets its own combination. Siblings from one pack can look related but still differ in height, structure, smell and potency.

Genetics studies back up how loose cannabis naming is. A 2015 analysis of 81 marijuana samples in PLoS ONE found that strain names often do not reflect a meaningful genetic identity. Different jars sold under the same name were not always close relatives, and the study found only a moderate link between a strain's reported indica or sativa ancestry and its actual genetic grouping.

This is also why the indica vs sativa labels are a rough guide at best. The name on the jar describes a family reputation. The plant inside is one phenotype of it.

What is pheno hunting?

Pheno hunting is how breeders turn a random shuffle of genes into something repeatable. The usual steps are simple to describe, even if they take months of work:

• Germinate a large batch of seeds from one cross, often dozens or more.
• Grow them under the same conditions so differences come from the plants, not the room.
• Compare each plant on structure, vigour, flowering time, smell, resin and, after drying, lab results.
• Keep a small number of standouts. Take cuttings, called clones, from each one.
• Grow the cuts again to confirm the traits repeat before naming or releasing anything.

Because every seed is a new roll of the dice, a breeder can only guarantee a trait by cloning. A clone is a cutting from a single mother plant, so it carries the same genes as the plant it came from. That is the difference between growing seeds, which gives variety, and growing cuts, which gives consistency.

What is a cut, and what does clone-only mean?

A cut is a cutting from a specific mother plant, grown on as a clone. Calling something "the Pisces cut" or "the Cookies cut" names the exact plant, and the person or company who kept it, rather than the whole strain. When a variety is clone-only, it is passed around as cuttings rather than seeds, so everyone growing it is working from the same genetics (or from a clone of a clone).

Clones aren't perfect copies in every respect. Environment still changes how a cut looks and smells, and a lineage kept for years can lose vigour. Still, a cut gets far closer to the original plant than a fresh seed ever will.

Cuts are also how some names get muddy. Two people can both sell "the real one" if they hold different cuts, or if a cut was relabelled along the way. When an exact cut matters, the breeder's name is a better clue than the strain name alone.

Why do strains have numbers like #45 or OG 18?

Numbers are usually a breeder's way of recording which seed or plant won the hunt. Gelato is a good example. It's a cross of Sunset Sherbet and Thin Mint Girl Scout Cookies, and several individual plants from that cross were kept and numbered. Gelato 41 and Gelato 45 are numbered selections from that family, and G33 is the short name for Gelato #33. Each has its own reputation, even though the parentage is the same as plain Gelato.

Motorbreath works the same way. It's a cross of Chemdawg and SFV OG, and Motorbreath 15 is described as the Pisces Genetics cut of it, known for a strong diesel smell. OG 18 is usually described as a phenotype of OG Kush, with a sour, diesel nose.

On WeedDB these pages carry descriptions drawn from published strain guides. Because phenotypes differ from grower to grower, treat the details as typical rather than guaranteed.

HybridGelatoTHC 18–26% · CaryophylleneHybridGelato 41THC 20–29% · CaryophylleneHybridGelato 45THC 19% · CaryophylleneG3HybridG33THC 20–32% · CaryophylleneHybridMotorbreathTHC 21–29% · LimoneneHybridMotorbreath 15THC 18–29% · MyrceneHybridOG 18THC 16–22% · Limonene

How should you read strain names as a buyer?

The practical takeaway is to expect variation. Two products with the same name can smell different, test differently and feel different, because they may come from different phenotypes, different cuts, or the same cut grown differently. In Canada, licensed producers print the Total THC and Total CBD on every label, which is a more reliable comparison than the name. Our reading cannabis labels guide walks through what else is on the package.

Smell is the other honest check. Terpenes, the aroma compounds in flower, differ from phenotype to phenotype, and are one of the easiest traits to compare. Lead terpenes like caryophyllene, limonene and myrcene show up across many strains, but the amounts differ plant by plant. If you find a version you like, note the producer and the batch, not only the strain name.

Lastly, a strain page is a family portrait, not a guarantee. If the producer lists the breeder or cut name, that tells you much more than the strain name alone.