Understanding Phenotypes in Cannabis Breeding
Why seeds from the same pack grow differently — and how to hunt for keeper plants.
Genotype vs. phenotype
Genotype is the genetic code; phenotype is how that code expresses in a specific environment. Two plants with identical genetics can show slight differences under different light, temperature, or feeding — but sibling seeds from a unstable cross can look like entirely different strains.
Pheno hunting means growing many seeds to find the one expression you want to keep and replicate.
How many seeds to pop
Serious hunters run 10–20+ seeds from a promising cross. Casual breeders might run 4–6. The more variation in the parent genetics, the more seeds you need to see the full range.
Kill weak plants early. Don't invest 12 weeks in a plant that showed poor vigor at week 3.
Preserving winners with clones
Once you identify a keeper, clone it before flipping to flower. Clones are genetically identical — your path to reproducible results.
Label clones clearly with parent cross, plant number, and date. A simple code like 'AC×BD #7' prevents confusion six months later.
Keep reading
Disclaimer: This article is for educational purposes only. Cannabis laws vary by jurisdiction. Always comply with local regulations.