Sativa seeds come with more vocabulary attached than any other kind of cannabis seed, and most of it means one thing to a botanist, another to a seed company and a third to the person trying to make a decision in front of the pack. A disappointing sativa grow usually goes back to a word that was understood in the wrong one of those senses: a flowering time taken as a fixed number, a „sativa-dominant” label taken as a description of effect, a landrace chosen as if it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand as the concrete examples, because it runs heavily to the classic end of the category where the words carry the most weight most; the definitions themselves hold to any sativa seed from any shop. They are in no particular order, since none of them makes usable on its own without the others.
Flowering time (and what it is counted from)
The number of weeks between the start of flowering and maturity, which is the one most misread number on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, not from sowing, so a „fourteen-week” sativa grown with a ordinary vegetative stage is a twenty-two-week plant. Breeders additionally give the shorter end of the range, since the other end sells less seed.
Long-flowering plants take anywhere 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 a sensible first pass for a grower with a fixed timetable. A grower who adds four weeks on top of the figure the pack says is seldom disappointed.
Foxtailing
The tendency of some flowers to grow new bud growth on top of existing ones, giving towered, open buds rather than round ones. In most indica-leaning lines it is a heat response, typically caused by light that is too close or a room too high, and the advice is to correct the room.
In a good number of sativas, especially Thai and certain Haze lines, it is genetic and will happen under a flawless room. A new sativa grower often wastes weeks chasing a problem that was never not there, lowering lights and temperatures and slowing an already slow plant further. The breeder seldom says which kind to expect; the parentage generally tells you.
Haze (the family, not the smell)
In its first sense a specific family of plants bred in 1970s California from Colombian, Colombian and South Indian landraces, and later preserved and refined in the Netherlands. The Haze grows tall, branches openly, flowers for twelve to sixteen weeks and carries a scent of spice, citrus and something metallic that no other line exactly has.
In its looser sense „Haze” is any hybrid which carries some of that family, which today is most of the sativa-leaning catalogue. A listing which reads „Haze” and gives no lineage may be mostly percent the old family or one small fraction of it, and the flowering character tracks the fraction, not the name. The useful question is never „is it a Haze” but „how much, and via which parent”.
Equatorial (the twelve-hour problem)
Refers to lines from regions where daylength hardly varies across the year, and where the plant never evolved a sharp response to shortening days. Such lines often start flowering slowly under a conventional twelve-hour light cycle, because twelve hours is, to them, an ordinary day rather than a signal.
The practical fix, handed down between sativa growers for decades, is to cut the light more: eleven hours, sometimes ten, particularly during the last weeks. It costs some little yield and gains an earlier decisive end. A listing which says „equatorial” is telling you about this with one word, and a grower that reads it as mere origin has missed the instruction inside it.
Stretch
The surge of upward growth which follows the switch to flowering. Indica-leaning plants gain around half again; sativas commonly double, and a few landrace types go further. The stretch continues two to five weeks and will not be halted after it begins, merely bent sideways by training.
In practical terms, the stretch figure is the fact worth reading ahead of deciding when to switch. A sativa switched at sixty centimetres in a two-metre tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving from indica strains nearly always switch too late the first time, and the lesson is written on the ceiling of the tent.
Landrace versus heirloom
A population of plants adapted through generations to one region by local climate and climate alike, and not by deliberate selection. Thai, Thai, Congolese and Mexican stock are the sativa examples. A landrace is a spread, not a single plant: inside a pack the heights, flowering times and smells range far more than in a tent-bred hybrid, and this spread is the whole value of keeping one.
The mistake is buying a landrace as a modern hybrid. It brings traits that make sense in an open field, such as a frame that no tent can contain and a flowering rhythm tuned to a equatorial daylength most growers cannot provide. „Heirloom” in a listing generally means a landrace that has been reproduced away from its origin for some generations, often with a degree of selection for indoor conditions; it is closer to manageable but nonetheless far from a hybrid. A seller offering „landrace” that does not give an collection point and a generation count is using the word loosely, and the pack should be priced accordingly.
Intersex tendency
The production of pollen-bearing flowers on a female plant, usually late in flower and often under stress. Every cannabis population has a degree of capacity for it; long-flowering lines express it more, for one plain reason: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a late watering to set it going, and a plant that has already waited past its intended end frequently throws a few late male flowers on its own in a final effort to make seed.
Not one of this makes a sativa strain weak by nature; it means the grower’s consistency count for a longer stretch. Light-tight room, steady conditions and harvesting when the plant is done and not a week later take away most of the risk. A listing which mentions the breeder screens parents for intersex tendency is worth worth hearing for a sativa than for any else.
Sativa-dominant
A catalogue term rather than a botanical one. The phrase generally indicates that the larger share of a hybrid’s lineage are described as sativa according to whoever drafted the description, and sometimes means no more than that the buds are airier or the aroma brighter than the same breeder’s other releases.
The effect people connect with a word, lively rather than sedating, is driven far more by terpene chemistry and the cannabinoid balance than by ancestry, and plenty of „sativa-dominant” releases produce a flat couch result and a good number of indica-labelled lines deliver exactly the opposite. To a buyer the percentage is useful for a rough hint to growth habit, flowering time and stretch; for a guide to how it feels it is next to worthless unless accompanied by the terpene notes.
Terpinolene (the „sativa smell”)
A terpene found in high amounts in many old sativa strains and accounting for most of what growers mean as a „sativa” aroma: fresh, woody, citrus and slightly floral all at once. It is fragile, lost easily by fast drying, and terpinolene fades faster during storage than the heavier terpenes that dominate most tent stock.
For a seed buyer the name does two jobs. When a listing lists terpinolene among the leading aromas, the line most likely carries real old-sativa ancestry whatever the label says. And when the grower wants that profile to survive by the jar, the drying has to be cool and cool; a fast drying room turns a terpinolene sativa into something that smells of hay and leaves nothing of what the pack promised.