Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and a good deal of it says one thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the pack. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong sense: a flowering time taken as a promise, a „sativa-dominant“ label read as a statement of character, a landrace chosen as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as the concrete examples, since it runs heavily towards the long-flowering end of the category where the vocabulary matter most; the meanings themselves apply to any sativa seed from any seller. They are given in no special order, since not one of them is usable without the rest.

Landrace versus heirloom

A population of plants shaped through generations to a particular region by local climate and growers together, rather than by deliberate selection. Colombian, Thai, Congolese and Mexican stock are the classic sativa cases. A landrace is a spread, rather than a single plant: within a pack the flowering times, finishing times and aromas spread far more than any tent-bred line, and this variation is the whole value of keeping one.

The trap is treating a landrace like a finished product. It carries traits that made sense in an equatorial field, including height that no tent can hold and a flowering rhythm set to an equatorial daylength most growers cannot offer. „Heirloom“ on a listing generally means a landrace that has been grown out away from its origin for some generations, typically with light selection towards tent life; it is nearer to manageable but nonetheless not a hybrid. A shop listing „landrace“ that does not give an origin point and a generation history is applying the word as a flavour, and the pack should be judged with that in mind.

Terpinolene

A aromatic compound found in large amounts in a lot of classic sativa strains and responsible for much of the thing people mean as the „sativa“ aroma: fresh, woody, citrus and slightly sweet all at once. It is fragile, lost quickly through hot drying, and terpinolene degrades more quickly during storage than the heavier terpenes that dominate most tent lines.

For a seed buyer the word does two jobs. When a listing lists terpinolene as the lead terpene, the line probably carries substantial Haze-era genetics whatever the label claims. And where the grower wants that smell to still be there by the jar, the cure has to be slow and cool; a fast drying room flattens a terpinolene sativa to something that smells of very little and leaves nothing of what the pack promised.

Sativa-dominant

A catalogue category and not a measurable one. It generally means that more of a hybrid’s lineage were described as sativa by the breeder who drafted the listing, and sometimes means nothing more than that the buds are longer or the aroma brighter than the same breeder’s indica-labelled lines.

The effect people connect with the word, clear-headed instead of heavy, is driven far more by terpene chemistry and the THC balance than it is by ancestry, and plenty of „sativa-dominant“ releases deliver a heavy sleepy result while a good number of indica-labelled stock do exactly the opposite. For a buyer the label is worth something for a loose hint to growth habit, flowering time and stretch; as a predictor to effect it is close to useless unless accompanied by the aroma description.

Stretch

The burst of upward growth which comes after the change to flowering. Most tent-bred plants gain half their height again; sativas commonly double, and some landrace types go further. The stretch continues two to five weeks and cannot be halted once it has started, only redirected by training.

In practical terms, a stretch figure is the fact to reading before choosing when to flip. A sativa flipped at sixty centimetres in a standard tent is at the lamp by week four of flower; one switched at thirty centimetres has room. People moving from indica stock almost always switch too late the first time, and the lesson is written on the ceiling of the tent.

Haze

In its first sense a specific family of plants bred in coastal California from Mexican, Colombian and South Indian landraces, and later preserved and worked in the Netherlands. A true Haze runs tall, fills out sparsely, flowers for twelve to sixteen weeks and smells of incense, citrus and a note metallic that no other line exactly has.

In its looser sense „Haze“ is any hybrid that carries a share of that family, and today is most of the sativa-leaning catalogue. A listing that reads „Haze“ without lineage could be eighty percent the old family or one sixteenth of it, and the flowering time tracks the share, not the name. The useful question is not „is it a Haze“ but „how much, and via which parent“.

Flowering time

The number of weeks from the start of flowering and harvest, which is the one most frequently misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, not from germination, so a „fourteen-week“ sativa started after an ordinary vegetative period is a five-month plant. Seed companies additionally quote the optimistic end of the spread, since the longer end sells fewer seed.

Long-flowering plants run anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be sorted by this figure, which is the reasonable first step if you have a room on a fixed timetable. A grower who allows four weeks on top of the figure the pack states is rarely caught out.

Intersex tendency

The production of male flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis population carries a degree of tendency to it; sativa plants show it more often, for one simple reason: fourteen weeks of flower is fourteen weeks of exposure for a timer leak, a heat spike or a late watering that can trigger it off, and an old plant has already gone past its natural end frequently throws a few desperate male flowers on its own in a last attempt to make seed.

Not one of these means a sativa strain unstable by nature; it makes the room’s consistency matter for longer. Light-tight room, stable temperatures and cutting the moment the plant is ready rather than two weeks later remove the greater part of the problem. A listing that states the breeder tests parents for intersex tendency is worth more for a sativa than for anything else.

Equatorial (the twelve-hour problem)

Refers to lines out of latitudes in which daylength hardly varies through the year, which means where the plant never evolved a strong response to changing days. Such plants often start flowering slowly at a standard twelve-hour light cycle, because twelve hours is, for them, a mild unremarkable day rather than a signal.

The working fix, passed down among sativa growers over decades, is to shorten the light more: eleven hours, sometimes ten, particularly during the last weeks. It loses a little yield and buys an more clearer finish. A listing which says „equatorial“ is telling you this with one word, and a grower who reads it as mere origin misses the point hidden in it.

Foxtailing

The tendency of some flowers to grow new bud growth on top of existing ones, giving spired, irregular buds instead of round ones. In the majority of indica-leaning lines it is a stress response, usually caused by light that is too close or temperatures too high, and the standard response is to correct the cause.

In many sativas, above all Thai and some Haze lines, it is built in and is going to occur in a flawless room. A new sativa grower frequently spends a month hunting a fault that is not a problem, dropping lights and heat only delaying an already long flower even more. The breeder seldom warns which type you should expect; the lineage generally tells you.

Latitude

The single figure that decides whether a sativa can ripen outdoors, and one that no pack prints. Long-flowering plants need the autumn days to go on late enough for the plant finish; at northern latitudes the frost arrives first, and the grower harvests an half-finished plant in late October or watches it to mould in November. A closer south, within a northern hemisphere, the later the season runs, and Mediterranean and subtropical growers can finish lines that temperate gardens cannot.

The practical rule for a seed listing: an „outdoor“ line harvest month is given for the breeder’s own latitude, usually a point within southern Europe or the western United States, and every step north of it pushes the finish later into the weather. A grower north of about the fiftieth parallel who is after a long-flowering sativa in the garden needs to be shopping for an autoflower or a greenhouse, not a better summer.