Cannabis Genetics & Catalog Curation
Royal King Seeds offers a curated catalog of cannabis seed varieties for US customers. We organize the catalog to help shoppers compare seed type, growth format, availability, and documented strain characteristics. Breeder or lineage information is identified on a product page only when a reliable source is available.
Understanding cannabis genetics
The notes below are general information about how cannabis genetics work — useful context when comparing varieties, not a description of any in-house breeding operation.
Feminized vs regular
Feminized seeds are produced to favor female plants, although biological outcomes can vary. Regular seeds produce both male and female plants. Because female plants produce the flower most growers harvest, feminized seeds reduce the work of identifying and removing males.
Phenotype variation & stabilization
Seeds from the same cross do not all grow into identical plants; individual phenotypes can differ in structure, terpene expression, and color. Breeders reduce that variation over generations through selection and backcrossing, producing more uniform seed lines. When you compare varieties, treat any single description — including ours — as a general profile rather than a guarantee of your exact pack.
Germination
Royal King Seeds offers a 95% germination guarantee, subject to the eligibility and claim requirements of the current germination policy. See our FAQ for details.
Popular strains in the catalog
Frequently asked questions
What does a stabilized cannabis seed line mean?+
A stabilized seed line is one where plants in a pack express similar traits — comparable flowering time, terpene profile, structure, and yield potential. In cannabis breeding, stabilization is generally achieved by selecting a target phenotype and backcrossing it over several generations until trait variation is reduced. An unstabilized cross tends to produce more variable plants.
What is phenotype variation?+
Seeds from the same cross do not all grow into identical plants. Different individuals (phenotypes) can vary in height, terpene expression, color, and structure. Breeders "phenotype hunt" by growing a population and selecting individuals that best express a target profile. As a shopper, this is why the same strain name can vary between sources and packs.
What is backcrossing in cannabis breeding?+
Backcrossing is a general breeding technique in which a selected phenotype is crossed back to a parent line over several generations to reinforce specific traits and reduce variation. It is one of the standard tools breeders use to make a seed line more uniform.
What is the difference between feminized and regular cannabis seeds?+
Feminized seeds are produced to favor female plants, although biological outcomes can vary. Regular seeds produce a mix of male and female plants. Female plants are the ones that produce the flower most growers harvest, so feminized seeds reduce the need to identify and remove males.
How should I read strain lineage information?+
Treat lineage and generation labels as the generally reported account rather than a certainty. Many well-known strains are offered by multiple sources, and the exact parentage of some is genuinely disputed. Where a reliable breeder or source is identified for a product, it is shown on that product page.
Does Royal King Seeds offer a germination guarantee?+
Royal King Seeds offers a 95% germination guarantee, subject to the eligibility and claim requirements of the current germination policy.