How to Read a Cannabis Seed Catalog Listing: Terms Decoded

A seed listing packs a lot of shorthand into a few lines. Read it in this order: who the breeder is, what type of seed it is, what the cross is, how long it takes, and how the seller describes yield and potency. Everything in a listing is a claim by the breeder or seller, so the useful skill is knowing which terms are definitions and which are marketing.

Start with the basic anatomy of a listing

Most listings follow a similar pattern, even when the layout differs. You will usually see a name, a breeder, a seed type, a short description, a few numbers and a price tied to a pack size. Knowing where each piece comes from helps you weigh it.

• Name and breeder: the identity of the product. The pair matters more than the name alone.
• Type: feminized, regular, autoflower or photoperiod.
• Cross or lineage: the parents.
• Numbers: flowering time, yield, height, potency.
• Pack and price: how many seeds and what they cost.

Whenever you can, read the breeder's description of its own cross, then use the retailer page for availability and policies. Our post on breeder packs vs white-label catalogs covers why that matters.

Seed type terms

For the fuller picture, see feminized vs regular vs autoflower and autoflower vs photoperiod.

Cross notation and genetics terms

Crosses are usually written as Parent A × Parent B, where the × means "crossed with." Some listings put the mother first and the father second, but not all do, so do not read too much into the order unless the breeder explains it.

• Lineage: the published ancestry of a variety. Breeders sometimes keep parts private.
• F1: a first-generation cross between two parent lines.
• Backcross (BX): a cross back to one of the parents, often to reinforce a trait.
• Hybrid and polyhybrid: a mix of two lines, or of many lines, respectively.
• Landrace: a regional variety that developed without modern breeding, as in our genetics explainer.
• Phenotype: how an individual plant looks and behaves. Seeds from one pack can show different phenotypes.
• Stable: a seller's word for uniform results. It is a claim, not a measurement.

Indica, sativa and dominance labels

"Indica-dominant" or "sativa-dominant" appears on almost every listing. It is a shorthand about plant shape and general character, not a precise percentage and not a promise about effect. Our indica vs sativa vs hybrid guide explains the limits of those labels, and our effect decision guide shows how to use them alongside other signals.

Numbers: flowering time, yield, height and potency

These figures are the most-read and least-standardized parts of a listing.

• Flowering time. Check what the clock starts from. For photoperiod plants it is often counted from the switch to flowering, while an autoflower figure may be counted from seed. The same number can mean different things. See our grow timeline.
• Yield. Often given as an indoor figure per area and an outdoor figure per plant. Both depend on setup, skill and phenotype, so they describe a possible outcome, not a typical one.
• Height. Usually a range. Plants can stretch after flowering begins, which affects tent fit.
• THC and CBD. Published ranges are the breeder's or seller's figures, and results can differ. A bigger number is not automatically better for you.

Treat any single number with caution. A range with a clear source is more useful than a bold claim without one.

Pack sizes, prices and freebies

Seeds are typically sold in packs of a set count, and the count varies between breeders and sellers. Compare price per seed rather than pack price, and be sure you are comparing the same type, because feminized, regular and autoflower packs are not priced alike. Free seeds are a common promotion. They are a bonus, but unlabeled freebies should not replace a known variety in a first grow.

Marketing language to read carefully

• "Easy to grow." Compare with plant size, flowering time and feeding notes.
• "Huge yields." Ask for the conditions behind the claim.
• "Stealth." Could refer to plant size, aroma or shipping. Read the context.
• "Premium," "top shelf," "elite." Subjective.
• "Guaranteed." Look up what exactly is covered in the seller's terms.

For ways to evaluate the seller side, our guides on auditing seed-bank reviews and comparing shipping policies go further.

A quick checklist

• Is the breeder named, and is it the original breeder or a reseller's own brand?
• Is the seed type clear?
• Is the cross or lineage listed, and does it match the breeder's own page?
• What does the flowering time count from?
• Are yield and potency given as ranges, with context?
• How many seeds are in the pack, and what is the price per seed?

Frequently Asked Questions

What does × mean in a cannabis strain cross?

It means the two named parents were crossed. The order sometimes shows mother then father, but not every breeder follows that convention.

What is the difference between an F1 and a backcross?

An F1 is the first-generation offspring of two parent lines. A backcross is a cross back to one of the parents, often to emphasize a trait.

Can I trust the THC percentage on a seed listing?

Treat it as the seller's or breeder's stated range. Real results vary by phenotype and growing conditions, and a higher figure does not make a variety better for every grower.

Does feminized mean 100 percent female plants?

It means the seeds are bred to produce female plants, with very high reliability in a good line, but stress or genetics can still cause male traits. See our hermaphrodite risk guide for details.

Is the flowering time on a listing the date I will harvest?

No. It is an estimate that depends on how it is counted and on your conditions. Plan with some slack.