Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and most of it means a certain thing to a botanist, something else to a seed company and a third to the grower standing in front of the pack. A disappointing sativa grow nearly always goes 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 read as a description of effect, a landrace chosen like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for reference, since it leans strongly to the long-flowering end of the spectrum where the vocabulary carry the most weight most; the meanings themselves apply to any sativa seed from any seller. They are in no special order, since none of them is usable on its own without the others.

Haze (the family, not the smell)

In its first sense a particular family of plants bred in coastal California from Mexican, Colombian and Thai parents, and then preserved and worked in the Netherlands. A true Haze grows tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of incense, citrus and something metallic that no other line exactly has.

In its looser sense « Haze » is any cross that contains some of that family, which today is a great many of the sativa-leaning catalogue. A listing that says « Haze » and gives no lineage may be mostly percent original classic family or a sixteenth of it, and the grow time follows the share, not the name. The working question is never « is it a Haze » but « how much, and via which parent ».

Landrace

A population of plants adapted over generations to a particular region by the local growers and growers together, and not by modern selection. Thai, Thai, Congolese and Oaxacan lines are the classic sativa examples. A landrace is variable, not a single plant: inside a pack the heights, finishing times and aromas range far more than any tent-bred hybrid, and that spread is the point of growing one.

The trap is treating a landrace like a modern product. It brings habits that made sense in an equatorial field, such as height no tent can contain and a flowering rhythm set to an daylength most growers never offer. « Heirloom » on a listing usually means a landrace that has been grown out somewhere for some generations, often with light selection for tent conditions; it is nearer to manageable but still far from a hybrid. A shop listing « landrace » that does not give an origin region and a generation count is applying the word loosely, and the seeds should be priced with that in mind.

Foxtailing (and when it is not a fault)

The habit of certain flowers to grow fresh calyx growth on top of old ones, giving towered, irregular buds instead of dense ones. In most tent-bred lines it is a heat response, typically caused by light that is too close or temperatures that is too high, and the standard response is to fix the room.

In a good number of sativas, especially Thai and certain Haze hybrids, it is built in and will occur under a perfect room. A first-time sativa grower often spends weeks hunting a fault that was never there, dropping lights and heat only delaying a long plant further. The listing seldom warns which kind to expect; the parentage usually tells you.

Equatorial (the twelve-hour problem)

Refers to lines from regions where daylength hardly changes across the year, and that the plant does not develop a sharp response to changing days. These lines frequently flower reluctantly at a conventional twelve-hour light cycle, because twelve hours is, to them, an ordinary day rather than a signal.

The working fix, passed around between sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, especially during the last weeks. It costs some yield yield and buys an earlier decisive end. A listing that says « equatorial » is telling you this in one word, and a grower that takes it as mere origin has missed the instruction hidden in it.

Latitude

The single number that decides if a sativa will ripen outdoors, and a number that no pack states. Equatorial plants require a run of shortening days to go on late enough to let the plant finish; in high latitudes the frost arrives before that, and the grower harvests an unripe plant in the end of October or else watches it rot in November. The further to the equator, within the northern hemisphere, the longer the window runs, and Mediterranean or low-latitude gardens are able to ripen plants that temperate growers cannot.

The usable reading for a seed pack: an « outdoor » sativa harvest date is stated for the breeder’s home latitude, normally somewhere within southern Europe or the western United States, and every step north of that moves the finish later towards the frost. A grower above about the fiftieth parallel who wants a long-flowering sativa in the garden needs to be looking for a sativa autoflower or else a greenhouse, and not a longer season.

Flowering time

The number of weeks between the start of flowering and maturity, and the one most frequently misread number on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, not from sowing, so a « fourteen-week » sativa started after an ordinary vegetative stage is a twenty-two-week plant. Breeders additionally quote the optimistic end of the range, because the longer end moves fewer seed.

Sativa plants run everywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks from the flip. The catalogue can be filtered by this figure, which is the sensible first pass if you have a room with a fixed schedule. A grower who adds four weeks on top of the figure the pack says is rarely caught out.

Hermaphroditism in long-flowering lines

The production of pollen-bearing flowers on a female plant, usually late in flower and frequently under stress. Every cannabis line carries some 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 missed watering that can set it off, and a old plant has gone beyond its natural finish often throws a few desperate pollen flowers on its own in a final effort to make seed.

Not one of these means a sativa strain weak as a matter of course; it makes the grower’s consistency count over longer. Light-tight tents, steady conditions and harvesting when the plant is done and not two week later remove most of the problem. A listing which states a breeder tests parents for intersex traits is worth worth hearing for a long-flowering line than on any other category.

Terpinolene

A terpene present in large proportion in many classic sativa lines and responsible for much of what growers mean as the « sativa » smell: fresh, piney, lemon and slightly floral at once. It is fragile, driven off quickly by fast drying, and terpinolene degrades faster in storage than the heavier terpenes that lead indica-leaning lines.

For a seed buyer the name earns two jobs. Where a listing lists terpinolene as the leading aromas, the strain most likely has real Haze-era genetics whatever the label says. And where the grower wants that profile to still be there to the jar, the cure has to be cool and cool; a warm dry flattens a terpinolene sativa into a flower that tastes of hay and no trace of what the pack promised.

Sativa-dominant

The marketing category and not a botanical one. The phrase usually indicates that the larger share of a hybrid’s parents are described as sativa by the breeder who wrote the description, which sometimes signals nothing more than that the buds are longer or the smell sharper than the that breeder’s indica-labelled releases.

The experience people connect with the word, lively instead of heavy, is driven more by terpene chemistry and by THC content than it is by ancestry, and a good number of « sativa-dominant » releases deliver a flat couch effect while plenty of the opposite lines do the opposite. To a buyer the label is worth something as a rough hint to growth habit, flowering time and stretch; for a predictor to effect it is next to worthless without the aroma description.

Stretch

The surge of vertical growth which comes after the switch to flowering. Most tent-bred plants gain half again; sativas routinely double, and a few landrace types go further. The stretch continues three to four weeks and will not be halted after it begins, merely bent sideways by training.

In tent terms, a stretch multiplier is a fact worth reading before deciding when to flip. A sativa switched at sixty centimetres centimetres in a two-metre tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers coming over from indica stock nearly always switch far too late the first time, and the lesson is visible on the ceiling of the tent.