How to Read Cannabis Seed Descriptions

Healthy cannabis plant in flower in a grow tent under a grow light

To read cannabis seed descriptions, start with seed type, feminized, autoflower or regular, then flowering time, height and yield. Flowering time and yield are the breeder’s estimates under good conditions, not promises. Yield in grams per square meter describes an indoor canopy area, so it does not convert straight to grams per plant.

What Do Feminized, Autoflower and Regular Mean?

Seed type comes first because it shapes the whole grow. Regular seeds can grow male or female plants, which breeders use for making seeds. Feminized seeds are bred to grow female plants, the ones that produce harvestable buds, though that is the breeder’s aim and not a guarantee. Autoflower seeds flower on their own schedule rather than waiting for shorter days. Photoperiod plants, both feminized and regular, flower when the light schedule changes. Our guide to autoflowers vs photoperiods explains the difference. You can browse feminized seeds, autoflower seeds and regular seeds.

Row of young cannabis plants of different sizes in pots on a grow room floor

How Should You Read Flowering Time?

For photoperiod strains, flowering time counts the weeks from the switch to a flowering light schedule until harvest. For autoflowers, listings often give the time from seed to harvest instead. Both are the breeder’s estimates under good conditions. Real timing changes with light, temperature and how you judge ripeness, so treat the number as a planning guide and leave a margin.

What Does Indoor Yield in g/m2 Mean?

Indoor yield in grams per square meter describes how much dried flower the breeder expects from one square meter of canopy, not from one plant. One square meter is about 10.76 square feet. How many plants fill that space varies a lot by grower, so the figure does not convert straight to grams per plant. It is an estimate under good conditions, not a promise.

Seed description terms at a glance

Definitions only, not data. Every figure on a listing is the breeder’s estimate.

Term What it means What it does not promise
Seed type Feminized, autoflower or regular The sex of every plant, from regular or feminized seeds
Flowering time Weeks of flowering, or seed to harvest for autoflowers An exact harvest date
Height Expected plant size A fixed height in your space
Indoor yield (g/m2) Dried flower per square meter of canopy Grams per plant
Outdoor yield Dried flower expected per plant outdoors A harvest in every climate
THC Expected cannabinoid level from the breeder A tested level in your harvest
Genetics Parent strains or lineage Identical traits to either parent

What Do THC, Terpene and Genetics Lines Tell You?

THC and terpene lines describe what the breeder expects from the strain, often based on their own plants. Your results depend on the plant and how it is grown, so read these lines as a profile, not a guarantee. The genetics line lists the parents, which hints at structure and flavor. Our guides to choosing the best seeds and our seed buyers guide cover more. Check the product label and local rules.

Sources

No outside study is cited on this page. It defines common listing terms, and the only figure, square meters to square feet, is a plain unit conversion.

Every figure on a seed listing is an estimate, which is how Kind Seed Co treats them in this general buying information.

FAQ

Is the listed THC percentage guaranteed?

No. The listed THC level is the breeder's estimate, often from their own plants under good conditions. Your result depends on the plant, the environment and when you harvest. Treat the number as a general profile of the strain rather than a promise. A lab test of your own harvest is the only way to know.

What does photoperiod mean on a seed listing?

Photoperiod means flowering is triggered by day length, or more exactly by the length of the dark period. Indoors, growers switch the light schedule to start flowering. Outdoors, plants flower as days shorten in late summer. Feminized and regular seeds are usually photoperiod. Autoflowers are different, because they flower on their own schedule without a change in light.

What does a germination guarantee cover?

Terms can differ by brand and can change. Read the germination guarantee page for what applies to your order, what is covered and any conditions. To compare brands, see the Weed Seeds Usa White Label range and read each listing.

Why do seed descriptions differ between sellers?

Sellers may copy breeder text, add their own notes or round numbers differently. Growing conditions behind each estimate can also differ. That is why the same strain can show different flowering times or yields from one listing to the next. Use the breeder's own description where you can, and treat every figure as an estimate.

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