Sativa seeds come with more jargon attached than any other kind of cannabis seed, and most of it means a certain thing to a botanist, something else to a breeder and a third to the grower trying to make a decision in front of the pack. The failed sativa grow usually goes back to a word that was read in the wrong one of those senses: a flowering time read as a fixed number, a “sativa-dominant” tag taken as a statement of effect, a landrace chosen as if it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand as reference, because it leans strongly to the long-flowering end of the spectrum where the vocabulary carry the most weight most; the definitions themselves apply to any sativa seed from any shop. They are in no particular order, since none of them makes usable on its own without the rest.

Flowering time (and what it is counted from)

The figure of weeks from the start of flowering and maturity, which is the single most misunderstood figure on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after a eight-week vegetative stage is a twenty-two-week plant. Breeders additionally quote the optimistic end of a spread, since the other end moves less seed.

Long-flowering plants run everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be sorted by that figure, which is the sensible first step if you have a room on a fixed timetable. A grower who adds four weeks to the figure the pack says is seldom disappointed.

Latitude (outdoor sativas)

The one figure that determines whether a sativa can finish outdoors, and one that no pack states. Long-flowering lines need the autumn days to go on late enough for the plant to finish; at high latitudes the frost arrives before that, and the grower harvests a half-finished plant in the end of October or else loses it rot in November. A closer to the equator, within a northern hemisphere, the later the window runs, and Mediterranean and low-latitude growers are able to finish plants that northern gardens never will.

The practical rule for a seed listing: an “outdoor” line harvest month is given for the breeder’s home latitude, normally somewhere in temperate Europe or the west coast of the United States, and every degree further north of it moves the date later towards the frost. A grower above roughly the fiftieth parallel who wants a true sativa in the garden is shopping for an autoflower or else a covered space, not a better summer.

Hermaphroditism in long-flowering lines

The production of male flowers on a female plant, usually late in flower and frequently in response to stress. Every cannabis line carries a degree of capacity for it; long-flowering plants express it more, and the reason is one plain reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a late watering that can trigger it off, and an old that has waited past its natural end often throws a few desperate male flowers on its own in a final effort to make seed.

None of this makes a sativa strain weak by nature; it makes the room’s consistency matter over longer. Light-tight tents, stable temperatures and harvesting when the plant is ready rather than two weeks later remove most of the risk. A listing which mentions the breeder tests parents for hermaphrodite traits is saying something more for a sativa than on any else.

Stretch (the doubling)

The burst of upward growth that follows the change to flowering. Indica-leaning plants add half again; sativas routinely double, and some landrace types triple. The stretch continues two to five weeks and cannot be stopped after it begins, only bent sideways by training.

In practical terms, the stretch figure is the number to reading before deciding when to flip. A sativa switched at sixty centimetres inside a two-metre tent is at the lamp by week four of flower; one switched at thirty centimetres centimetres has room. People coming from indica stock almost always flip too late the first time, and the lesson is written on the ceiling of the tent.

Landrace

A population of plants shaped through centuries to a particular region by local climate and growers together, and not by deliberate breeding. Thai, Colombian, Congolese and Mexican stock are the sativa examples. A landrace is variable, rather than a one plant: inside a pack the heights, finishing times and aromas spread far more than in a tent-bred line, and this variation is the whole value of growing one.

The trap is treating a landrace as a modern product. It brings habits that made sense in an open field, including height that no tent can contain and a flowering rhythm tuned to a daylength most growers never offer. “Heirloom” in a listing usually refers to a landrace that has been reproduced away from its origin for some generations, often with light selection towards tent conditions; it is nearer to manageable but still far from uniform. A seller listing “landrace” that does not give a collection region and a generation history is applying the word as a flavour, and the seeds should be priced with that in mind.

Terpinolene (the “sativa smell”)

A terpene present in high amounts in a lot of old sativa strains and accounting for much of what people describe as a “sativa” smell: green, piney, lemon and faintly sweet at once. It is volatile, driven off quickly by hot drying, and it fades more quickly during storage than the heavier terpenes that dominate indica-leaning lines.

For a seed buyer the word does two things. Where a listing lists terpinolene among the lead aromas, the strain most likely carries substantial old-sativa ancestry regardless of what the percentage claims. And when the grower wants that smell to still be there to the jar, the cure is going to be slow and cool; a warm drying room turns a terpinolene sativa into a flower that tastes of very little and no trace of what the pack promised.

Equatorial

Describes lines from regions in which daylength barely varies across the year, which means where the plant does not develop a strong reaction to changing days. Such plants often start flowering slowly at a conventional twelve-hour light cycle, because twelve hours is, for them, a mild unremarkable day rather than a signal.

The practical response, handed down between sativa growers over decades, is to shorten the light more: eleven hours, sometimes ten, particularly in the final weeks. It loses some yield yield and buys an earlier clearer finish. A listing which uses “equatorial” is warning you about this with one word, and a grower that reads it as mere geography has missed the instruction hidden in it.

Sativa-dominant

The catalogue term and not a measurable one. It generally indicates that the larger share of a hybrid’s parents are classed as sativa according to the breeder who drafted the listing, which occasionally signals nothing more than that the buds are airier or the smell brighter than the that breeder’s other lines.

The experience people connect with a word, lively rather than heavy, is driven far more by terpene profile and by cannabinoid balance than it is by the sativa fraction, and a good number of “sativa-dominant” releases produce a flat couch result and plenty of indica-labelled lines do exactly the opposite. To a grower the label is worth something for a loose hint to growth habit, flowering time and stretch; as a guide to how it feels it is close to worthless without the terpene description.

Foxtailing

The habit of some flowers to push out new bud growth on top of existing ones, producing towered, open buds rather than dense ones. In most tent-bred strains it is a stress response, typically caused by light too close or a room too high, and the advice is to correct the room.

In many sativas, above all Thai and certain Haze hybrids, it is genetic and is going to occur in a flawless room. A new sativa grower often wastes a month hunting a fault that is there, lowering lights and temperatures and delaying an already slow plant even more. The listing rarely warns which type you should expect; the parentage generally tells you.