Sativa seeds arrive with more jargon around them than any other kind of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a seed company and a third to the person standing in front of the pack. The failed sativa grow nearly always goes back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag taken as a description of character, a landrace bought like it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as reference, since it leans strongly towards the classic end of the category and that is where the words carry the most weight most; the definitions though hold to any sativa seed from any seller. They are given in no special order, since none of them makes usable on its own without the rest.

Flowering time

The figure of weeks between the onset of flowering and maturity, which is the single most misunderstood number on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown after an eight-week vegetative period is a five-month plant. Seed companies also quote the shorter end of the spread, because the other end sells less seed.

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

Haze (the family, not the smell)

In its first sense a particular line of plants bred in 1970s California from Colombian, Colombian and Thai landraces, and then preserved and refined in the Netherlands. The Haze runs tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of incense, citrus and a note metallic that no other line quite reproduces.

In its second sense “Haze” is any hybrid which carries a share of that family, which by now is most of the sativa-leaning market. A listing which reads “Haze” without lineage may be mostly percent the old family or a sixteenth of it, and the flowering time follows the share, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.

Foxtailing

The habit of some flowers to push out fresh calyx clusters on top of old ones, giving towered, irregular buds instead of dense ones. In the majority of tent-bred strains it is a heat response, typically caused by light that is too close or a room too high, and the standard response is to correct the room.

In a good number of sativas, above all Southeast Asian and some Haze lines, it is genetic and will happen in a perfect room. A new sativa grower frequently wastes weeks hunting a fault that is not a problem, lowering lights and temperatures and slowing an already long plant further. The breeder rarely says which type to expect; the lineage generally does.

Latitude (outdoor sativas)

The single figure that determines if a sativa will ripen outdoors, and one that no pack states. Equatorial lines need the autumn days to continue long enough to let the plant ripen; at high latitudes the frost comes first, and the grower cuts an unripe plant in the end of October or watches it rot in November. A further south, within the northern hemisphere, the later the season runs, and Mediterranean and subtropical growers are able to finish plants that northern gardens cannot.

The usable reading for a seed listing: an “outdoor” sativa finishing date is stated for the breeder’s own latitude, normally somewhere within temperate Europe or the west coast of the United States, and every step further north of that pushes the date back into the weather. A grower north of about the fiftieth parallel who is after a true sativa in the garden is shopping for a sativa autoflower or a greenhouse, not a longer summer.

Terpinolene (the “sativa smell”)

A aromatic compound present in high amounts in a lot of classic sativa strains and responsible for most of what growers mean as the “sativa” aroma: fresh, piney, lemon and slightly floral at once. It is volatile, lost quickly through fast drying, and it degrades faster in the cure than the earthier terpenes which dominate most tent lines.

To a seed buyer the name does two jobs. When a listing lists terpinolene as the lead aromas, the line most likely carries real Haze-era ancestry whatever the percentage claims. And when the grower wants that profile to still be there to the jar, the drying has to be slow and cool; a warm dry turns a terpinolene sativa into a flower that smells of very little and leaves no trace of what the pack described.

Equatorial

Describes lines from latitudes where daylength barely changes across the year, which means where the plant never develop a sharp reaction to changing days. These lines often flower slowly under a conventional twelve-hour schedule, because twelve hours is, for them, a mild ordinary day rather than a signal.

The practical response, handed down between sativa growers for decades, is to shorten the light further: eleven hours, sometimes ten, especially during the last weeks. It costs a little yield and buys an earlier decisive end. A listing which uses “equatorial” is telling you this with one word, and a grower who takes it as a note on geography has missed the point hidden in it.

Sativa-dominant (the label)

A catalogue category rather than a measurable one. The phrase generally indicates that more of a hybrid’s lineage were classed as sativa by the breeder who drafted the listing, which sometimes signals nothing more than a certain the buds are longer or the aroma sharper than the that breeder’s other lines.

The effect people connect with the word, clear-headed rather than sedating, is governed far more by terpene chemistry and the cannabinoid content than by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a flat couch result and a good number of indica-labelled lines do exactly the opposite. For a grower the percentage is useful as a rough hint to growth habit, flowering time and stretch; for a guide to how it feels it is close to worthless without the terpene description.

Intersex tendency

The appearance of pollen-bearing flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis line has some tendency for do; long-flowering lines express it more, for a plain one: fourteen weeks of flower is sixteen weeks of opportunity for a light leak, a heat spike or a missed watering to trigger it going, and a plant plant has already gone past its intended finish frequently produces a few late pollen sacs on its own as a last attempt to set seed.

Not one of these means a sativa strain weak as a matter of nature; it makes the grower’s discipline count for a longer stretch. Light-tight tents, steady conditions and harvesting when the plant is done rather than a weeks after remove most of the risk. A listing which mentions a breeder tests parents for intersex traits is worth worth hearing on a long-flowering line than for anything else.

Landrace versus heirloom

A population of plants shaped over centuries to a particular region by the local growers and climate alike, and not by deliberate breeding. Thai, Thai, Malawian and Mexican stock are the classic sativa cases. A landrace is a spread, not a single plant: inside a pack the flowering times, finishing times and aromas range far more than in a tent-bred line, and this variation is the point of growing one.

The mistake is treating a landrace as a modern product. It brings traits that make sense in an open field, including height that no tent can hold and a flowering rhythm tuned to an equatorial daylength most growers never provide. “Heirloom” in a listing generally means a landrace that has been reproduced somewhere for a number of generations, typically with light selection for indoor conditions; it is closer to usable but nonetheless far from a hybrid. A seller listing “landrace” that does not give a origin point and a generation history is applying the word loosely, and the seeds should be priced with that in mind.

Stretch

The surge of upward growth that comes after the change to flowering. Most tent-bred plants add around half again; sativas routinely double, and a few landrace lines go further. The stretch lasts three to four weeks and cannot be stopped once it has started, only bent sideways by training.

In tent terms, a stretch multiplier is a number to read before choosing when to switch. A sativa switched at sixty centimetres centimetres inside a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People coming from indica stock nearly always switch far too late the first time, and the lesson is written on the ceiling of the tent.