Sativa seeds come with more jargon around them than any other category of cannabis seed, and a good deal of it says 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 traces back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” label read as a statement of character, a landrace bought as if it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com open as reference, since it leans heavily towards the long-flowering end of the spectrum and that is where the words matter most; the definitions themselves apply to any sativa seed from any shop. They are in no particular order, because not one of them is sense without the others.
Foxtailing
The habit of certain flowers to grow new bud growth on top of existing ones, producing spired, open buds instead of dense ones. In most indica-leaning lines it is a heat response, usually from light too close or a room too high, and the standard response is to fix the room.
In a good number of sativas, above all Southeast Asian and certain Haze lines, it is genetic and will happen under a perfect room. A new sativa grower frequently spends a month chasing a problem that was never not there, dropping lights and heat and delaying a slow plant even more. The breeder seldom says which kind to expect; the lineage usually does.
Terpinolene (the “sativa smell”)
A aromatic compound present in large proportion in many old sativa strains and accounting for much of the thing people mean as a “sativa” aroma: green, woody, citrus and faintly floral at once. It is volatile, lost quickly by hot drying, and terpinolene fades more quickly during the cure than the earthier terpenes that lead indica-leaning stock.
For a seed buyer the word earns two things. When a listing names terpinolene among the lead aromas, the line probably has real old-sativa ancestry whatever the percentage says. And when the grower are after that smell to survive to the jar, the drying is going to be cool and slow; a fast dry turns a terpinolene line into something that smells of hay and leaves nothing of what the pack described.
Sativa-dominant (the label)
A marketing category rather than a measurable one. The phrase usually means that more of a hybrid’s lineage are described as sativa according to whoever wrote the description, which occasionally means nothing more than a certain the flowers are longer or the smell sharper than the same breeder’s other lines.
The experience people associate with the word, clear-headed instead of heavy, is driven far more by terpene chemistry and by cannabinoid content than by the sativa fraction, and plenty of “sativa-dominant” hybrids deliver a heavy sleepy result and plenty of the opposite stock do the reverse. For a buyer the label is worth something as a rough hint to growth habit, flowering time and stretch; for a guide to effect it is next to worthless unless accompanied by the terpene description.
Stretch
The burst of vertical growth that comes after the switch to flowering. Indica-leaning plants gain around half their height again; sativas routinely double, and some landrace lines go further. The stretch lasts two to five weeks and will not be stopped after it begins, merely bent sideways by training.
In practical terms, a stretch multiplier is the fact worth reading before deciding when to flip. A sativa switched at sixty centimetres in a two-metre tent is touching the lamp before week four of flower; one switched at thirty centimetres has room. Growers coming from indica stock almost always flip too late the first time, and the consequence is written on the ceiling of the tent.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, typically late in flower and frequently under stress. Every cannabis population carries a degree of tendency to do; sativa plants show it more often, for a simple one: fourteen weeks of flower is sixteen weeks of exposure for a light leak, a temperature spike or a late watering that can trigger it off, and an plant that has gone beyond its intended end frequently throws a few desperate pollen sacs on its own as a final effort to set seed.
None of these makes a sativa line weak as a matter of course; it means the grower’s discipline matter over a longer stretch. Light-tight room, steady temperatures and cutting when the plant is ready rather than two weeks later take away the greater part of the problem. A listing which states a breeder tests parents for intersex tendency is saying something worth hearing on a long-flowering line than on any else.
Haze (the family, not the smell)
In its first sense a particular line of plants put together in coastal California from Mexican, Thai and Thai landraces, and later preserved and refined in the Netherlands. A true Haze grows tall, fills out openly, takes for twelve to sixteen weeks and carries a scent of incense, citrus and a note sharp that no other line exactly reproduces.
In its second sense “Haze” is whatever hybrid which carries a share of that family, and today is most of the sativa-leaning market. A listing which reads “Haze” without lineage could be eighty percent original old family or one sixteenth of it, and the grow time tracks the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Landrace
A population of plants shaped over generations to one place by local climate and climate together, rather than by deliberate breeding. Colombian, Colombian, Malawian and Mexican lines are the sativa examples. A landrace is a spread, rather than a one plant: within a pack the heights, flowering times and aromas spread widely than any tent-bred hybrid, and this variation is the whole value of keeping one.
The trap is buying a landrace as a modern product. It brings habits that make sense in an equatorial field, including height that no tent can contain and a flowering rhythm set to a daylength most growers cannot provide. “Heirloom” on a listing generally refers to a landrace that has been grown out somewhere over a number of generations, typically with a degree of selection for tent life; it is closer to manageable but nonetheless not uniform. A shop listing “landrace” without a collection region and a generation history is applying the word loosely, and the seeds should be priced with that in mind.
Latitude
The one figure that determines if a sativa will finish outdoors, and a number no pack prints. Equatorial plants require the autumn days to continue long enough to let the plant finish; at northern latitudes the frost arrives before that, and the grower harvests an unripe plant in late October or watches it to mould in November. A closer to the equator, in a northern hemisphere, the longer the window runs, and Mediterranean and low-latitude growers are able to ripen lines that temperate growers never will.
The practical reading for a seed pack: an “outdoor” sativa harvest month is stated for the breeder’s own latitude, normally a point in temperate Europe or the western United States, and every degree further north of it moves the finish later into the weather. A grower above about the fiftieth parallel who is after a true sativa in the garden needs to be looking for an autoflower or else a covered space, not a longer summer.
Equatorial
Describes lines out of latitudes in which daylength barely varies across the year, which means that the plant does not evolved a sharp response to shortening days. These lines often start flowering reluctantly at a standard twelve-hour schedule, since twelve hours is, for them, an ordinary day and not a signal.
The working response, passed around between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, especially during the final weeks. It loses a yield yield and gains an more clearer finish. A listing that says “equatorial” is telling you about this with one word, and a grower that reads it as mere geography has missed the instruction hidden in it.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and harvest, and the one most misread number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa started after an ordinary vegetative period is a five-month plant. Seed companies additionally give the shorter end of a spread, since the longer end sells less seed.
Sativa lines take everywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the switch. The catalogue can be sorted by that number, which is the sensible first step if you have a room with a fixed timetable. A grower who adds four weeks on top of the figure the pack says is rarely disappointed.