Sativa seeds arrive with more vocabulary around them than any other category of cannabis seed, and most of it says one thing to a botanist, another to a breeder and something different again to the grower trying to make a decision in front of the pack. The disappointing sativa grow usually goes back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” tag taken as a statement of effect, a landrace chosen like 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, because it runs strongly towards the classic end of the category where the words carry the most weight most; the meanings though apply to any sativa seed from any shop. They are given in no special order, since not one of them is usable on its own without the rest.
Foxtailing
The habit of certain flowers to push out 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 response, typically caused by light that is too close or a room that is too high, and the advice is to fix the cause.
In a good number of sativas, above all Southeast Asian and some Haze hybrids, it is genetic and will happen under a perfect room. A first-time sativa grower often wastes weeks hunting a fault that was never not a problem, lowering lights and heat and slowing an already slow plant even more. The listing rarely warns which type to expect; the lineage usually tells you.
Landrace versus heirloom
A population of plants adapted through generations to a particular place by the local climate and growers together, and not by deliberate breeding. Thai, Thai, Congolese and Mexican stock are the classic sativa cases. A landrace is a spread, not a single plant: within a pack the heights, flowering times and smells range far more than any tent-bred line, and that variation is the point of growing one.
The trap is treating a landrace as a finished hybrid. It carries traits that made sense in an equatorial field, such as a frame that no tent can contain and a flowering clock set to an daylength the majority of growers never provide. “Heirloom” on a listing usually refers to a landrace that has been grown out somewhere for a number of generations, often with light selection towards tent conditions; it is nearer to usable but still not a hybrid. A shop offering “landrace” that does not give a origin point and a reproduction count is applying the word as a flavour, and the pack should be priced with that in mind.
Stretch
The burst of vertical growth which follows the change to flowering. Most tent-bred plants add half again; sativas routinely double, and a few equatorial types go further. The stretch continues three to four weeks and cannot be stopped once it begins, merely redirected by training.
In practical terms, a stretch figure is a number worth read ahead of deciding when to switch. A sativa switched 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 moving over from indica strains almost always switch too late the first time, and the lesson is written on the ceiling of the tent.
Latitude (outdoor sativas)
The single figure that determines if a sativa will ripen outdoors, and a number that no pack prints. Long-flowering lines require a run of shortening days to continue late enough to let the plant to ripen; at high latitudes the frost arrives first, and the grower cuts a half-finished plant in the end of October or watches it to mould in November. A closer south, within a northern hemisphere, the later the season stretches, and Mediterranean and subtropical growers are able to finish lines that northern gardens cannot.
The practical rule of a seed pack: an “outdoor” sativa finishing month is given for the breeder’s home latitude, normally somewhere in temperate Europe or the western United States, and every degree further north of it moves the finish back towards the frost. A grower above about the fiftieth parallel that wants a long-flowering sativa in the garden needs to be shopping for a sativa autoflower or else a greenhouse, and not a better summer.
Intersex tendency
The production of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis population carries a degree of tendency to it; long-flowering plants show it more, for a plain one: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a temperature spike or a late watering that can trigger it off, and a old plant has already waited beyond its intended finish often produces a few desperate male sacs on its own in a final effort to make seed.
Not one of this makes a sativa line weak by course; it means the room’s consistency matter over a longer stretch. A sealed tents, steady temperatures and harvesting when the plant is ready and not two week after remove the greater part of the risk. A listing which states a breeder screens parents for intersex tendency is saying something more for a long-flowering line than for anything other category.
Flowering time (and what it is counted from)
The figure of weeks from the start of flowering and harvest, which is the one most misread number on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa grown after an ordinary vegetative stage is a five-month plant. Seed companies additionally quote the optimistic end of the spread, since the longer end moves fewer seed.
Long-flowering plants take anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks from the flip. The catalogue can be sorted by that figure, which is the reasonable first step if you have a grower on a tight schedule. A grower who allows four weeks on top of whatever the pack says is seldom caught out.
Terpinolene
A terpene present in high amounts in many old sativa lines and accounting for much of the thing growers mean as the “sativa” aroma: fresh, woody, citrus and faintly sweet all at once. It is volatile, driven off quickly through hot drying, and it degrades more quickly during storage than the earthier terpenes which dominate indica-leaning stock.
For a seed buyer the name does two things. When a listing lists terpinolene among the leading terpene, the strain probably has real Haze-era genetics whatever the label claims. And where the grower wants that smell to survive to the jar, the cure has to be slow and cool; a warm dry flattens a terpinolene sativa to something that smells of hay and leaves nothing of what the pack described.
Sativa-dominant (the label)
The catalogue category and not a botanical one. The phrase generally indicates that the larger share of a hybrid’s lineage are described as sativa by the breeder who wrote the listing, and occasionally means no more than a certain the flowers are airier or the aroma brighter than the that breeder’s indica-labelled releases.
The experience people connect with the word, clear-headed instead of heavy, is governed more by terpene profile and by THC content than by ancestry, and a good number of “sativa-dominant” releases produce a heavy couch result and plenty of the opposite lines deliver the opposite. For a buyer the percentage is useful as a loose hint to growth habit, flowering time and stretch; for a guide to how it feels it is next to useless without the aroma notes.
Equatorial (the twelve-hour problem)
Describes plants out of regions where daylength hardly varies across the year, and that the plant does not evolved a sharp response to shortening days. These lines frequently flower slowly under a conventional twelve-hour light cycle, because twelve hours is, to them, a mild ordinary day rather than a signal.
The working fix, handed down between sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, particularly in the final weeks. It costs some little yield and buys a more decisive end. A listing that says “equatorial” is telling you this with one word, and a grower that reads it as mere geography misses the point hidden in it.
