Sativa seeds arrive with more jargon around them than any other category of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a breeder and something different again to the person standing in front of the pack. The disappointing sativa grow nearly always traces back to a word that was read in the wrong one of those senses: a flowering time taken as a fixed number, a “sativa-dominant” tag taken as a description of character, a landrace chosen like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com open for reference, since it runs heavily to the long-flowering end of the category and that is where the words carry the most weight most; the definitions though apply to any sativa seed from any seller. They are in no special order, because not one of them makes usable without the others.

Stretch

The burst of upward growth which comes after the switch to flowering. Indica-leaning plants gain half again; sativas routinely double, and a few equatorial lines triple. The stretch lasts three to four weeks and will not be stopped once it begins, only bent sideways by training.

In tent terms, a stretch figure is a number worth read before choosing when to flip. A sativa flipped at sixty centimetres in a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. Growers coming over from indica stock almost always switch far too late the first time, and the consequence is written on the ceiling of the tent.

Flowering time (and what it is counted from)

The number of weeks between the onset of flowering and maturity, which is the one most frequently misunderstood figure on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after a eight-week vegetative period is a twenty-two-week plant. Seed companies additionally give the shorter end of the spread, because the other end moves fewer seed.

Sativa lines run everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range comes in at around 16 weeks after the flip. The catalogue can be sorted by that figure, which is the sensible first step for a grower on a tight timetable. A grower who allows four weeks to the figure the pack says is rarely caught out.

Terpinolene (the “sativa smell”)

A aromatic compound present in large amounts in a lot of classic sativa lines and accounting for most of the thing people mean as the “sativa” aroma: fresh, woody, lemon and faintly sweet at once. It is volatile, driven off easily through hot drying, and it degrades more quickly in the cure than the earthier terpenes that lead most tent lines.

For a seed buyer the name earns two things. When a listing names terpinolene as the lead terpene, the line probably has real old-sativa ancestry regardless of what the percentage says. And where the you are after that smell to survive by the jar, the cure has to be slow and slow; a warm dry turns a terpinolene sativa into something that smells of hay and leaves no trace of what the pack promised.

Haze

In its first sense a specific line of plants bred in coastal California from Colombian, Colombian and South Indian landraces, and later kept and refined in the Netherlands. A true Haze grows tall, fills out sparsely, flowers for twelve to sixteen weeks and smells of spice, citrus and something sharp that no line exactly has.

In its second sense “Haze” is whatever cross which contains a share of that family, and today is a great many of the sativa-leaning market. A listing that says “Haze” and gives no lineage could be eighty percent the old family or a sixteenth of it, and the flowering character tracks the fraction, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.

Equatorial (the twelve-hour problem)

Describes plants from regions where daylength barely varies across the year, which means where the plant never evolved a sharp reaction to shortening days. Such plants often start flowering slowly at a conventional twelve-hour schedule, since twelve hours is, for them, an ordinary day and not a signal.

The practical response, handed down between sativa growers over decades, is to cut the light further: eleven hours, occasionally ten, especially during the final weeks. It loses some little yield and gains an earlier decisive end. A listing that says “equatorial” is telling you about this in one word, and a grower that reads it as a note on geography misses the instruction hidden in it.

Landrace versus heirloom

A population of plants adapted through centuries to a particular place by the local growers and growers alike, rather than by modern selection. Colombian, Colombian, Congolese and Mexican stock are the classic sativa examples. A landrace is a spread, not a single plant: within a pack the flowering times, flowering times and aromas range widely than any tent-bred line, and this variation is the whole value of keeping one.

The mistake is treating a landrace like a finished product. It carries traits that made sense in an equatorial field, including a frame no tent can hold and a flowering rhythm set to an equatorial daylength the majority of growers never offer. “Heirloom” on a listing generally refers to a landrace that has been reproduced away from its origin for a number of generations, typically with light selection towards tent conditions; it is nearer to usable but nonetheless far from uniform. A seller offering “landrace” without an collection point and a reproduction history is applying the word as a flavour, and the pack should be judged accordingly.

Intersex tendency

The production of pollen-bearing flowers on a female plant, typically late in flower and frequently under stress. Every cannabis population carries some tendency for it; sativa lines express it more, and the reason is a simple reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering to trigger it going, and an plant plant has gone past its natural finish often produces a few late pollen sacs on its own in a final attempt to make seed.

None of this means a sativa strain unstable by nature; it makes the grower’s consistency count for longer. Light-tight tents, steady temperatures and cutting the moment the plant is ready rather than a week later remove the greater part of the problem. A listing that states a breeder screens parents for intersex traits is worth more for a long-flowering line than on anything else.

Latitude

The one figure that determines whether a sativa can finish outdoors, and a number that no pack states. Long-flowering lines need the run of shortening days to continue long enough to let the plant finish; in northern latitudes the frost comes first, and the grower cuts a half-finished plant in the end of October or else watches it rot in November. A closer to the equator, within the northern hemisphere, the later the season runs, and coastal or subtropical growers can finish lines that northern gardens never will.

The usable reading for a seed pack: an “outdoor” sativa harvest month is given for the breeder’s home latitude, normally a point in temperate Europe or the western United States, and each step north of that pushes the finish later into the frost. A grower above about the fiftieth parallel that is after a true sativa in the garden needs to be shopping for a sativa autoflower or a greenhouse, not a longer summer.

Foxtailing (and when it is not a fault)

The habit of some flowers to grow new calyx growth on top of existing ones, producing towered, irregular buds instead of dense ones. In most indica-leaning lines it is a stress symptom, usually caused by light that is too close or a room too high, and the standard response is to correct the cause.

In many sativas, especially Southeast Asian and certain Haze lines, it is built in and will occur in a flawless room. A first-time sativa grower frequently wastes weeks hunting a fault that was never a problem, lowering lights and heat and slowing an already long plant even more. The listing seldom says which kind you should expect; the lineage usually tells you.