Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and most of it says one thing to a botanist, something else to a seed company and a third to the grower standing in front of the listing. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of effect, a landrace bought like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand for reference, since it leans strongly to the classic end of the category where the words carry the most weight most; the meanings themselves apply to any sativa seed from any shop. They are given in no special order, because not one of them is usable on its own without the rest.
Terpinolene
A terpene present in large proportion in a lot of old sativa lines and accounting for much of the thing growers describe as a “sativa” aroma: green, piney, citrus and faintly floral all at once. It is volatile, lost quickly through hot drying, and it degrades faster during storage than the heavier terpenes that lead most tent lines.
For a seed buyer the word earns two jobs. Where a listing names terpinolene among the leading aromas, the strain most likely has substantial Haze-era genetics whatever the percentage claims. And when the grower wants that profile to survive by the jar, the cure is going to be cool and cool; a fast dry turns a terpinolene line into something that smells of very little and leaves no trace of what the pack described.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, usually towards the end in flower and often under stress. Almost every cannabis line carries some capacity for do; sativa plants show it more often, and the reason is a plain reason: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a temperature spike or a late watering to trigger it going, and a plant that has gone past its natural finish often produces a few desperate pollen sacs on its own as a final attempt to make seed.
None of these makes a sativa line weak as a matter of nature; it makes the grower’s consistency count for a longer stretch. A sealed room, stable temperatures and cutting the moment the plant is ready and not a weeks after take away most of the problem. A listing that states the breeder tests parents for intersex tendency is saying something worth hearing for a long-flowering line than for anything other category.
Latitude (outdoor sativas)
The one figure that decides whether a sativa can ripen outdoors, and one that no pack prints. Long-flowering plants require a run of shortening days to continue late enough to let the plant finish; in northern latitudes the frost arrives before that, and the grower cuts an half-finished plant in the end of October or watches it to mould in November. The closer to the equator, in the northern hemisphere, the longer the season stretches, and coastal and subtropical gardens are able to ripen plants that northern gardens cannot.
The usable rule of a seed listing: an “outdoor” line finishing month is stated for the breeder’s own latitude, usually somewhere in southern Europe or the west coast of the United States, and each step north of it pushes the finish back towards the frost. A grower above about the fiftieth parallel that wants a true sativa outdoors is shopping for an autoflower or a greenhouse, not a longer season.
Haze
In its first sense a particular line of plants bred in 1970s California from Colombian, Thai and South Indian landraces, and later preserved and refined in the Netherlands. A true Haze runs tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of spice, pine and something metallic that no other other line exactly has.
In its second sense “Haze” is whatever hybrid that contains some of that family, and by now is most of the sativa-leaning catalogue. A listing which says “Haze” and gives no parents could be mostly percent original old family or a sixteenth of it, and the grow time follows the fraction, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Stretch (the doubling)
The burst of vertical growth that follows the change to flowering. Indica-leaning plants gain half again; sativas routinely double, and a few equatorial lines go further. The stretch lasts three to four weeks and will not be stopped once it begins, only redirected by training.
In practical terms, a stretch figure is a fact worth read ahead of deciding when to flip. A sativa flipped at sixty centimetres in a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres has room. People coming over from indica strains almost always switch far too late the first time, and the consequence is visible on the ceiling of the tent.
Landrace
A population of plants adapted over centuries to one place by local growers and growers together, rather than by modern selection. Thai, Thai, Congolese and Mexican stock are the classic sativa examples. A landrace is variable, not a one plant: inside a pack the flowering times, flowering times and aromas spread widely than in any tent-bred hybrid, and that variation is the whole value of keeping one.
The trap is buying a landrace as a modern product. It brings traits that make sense in an open field, such as a frame that no tent can contain and a flowering rhythm set to an equatorial daylength most growers never offer. “Heirloom” on a listing usually refers to a landrace that has been grown out away from its origin for a number of generations, often with a degree of selection towards tent life; it is closer to usable but nonetheless not a hybrid. A seller offering “landrace” without an collection point and a generation history is applying the word loosely, and the pack should be judged accordingly.
Sativa-dominant
The marketing term and not a measurable one. It usually indicates that the larger share of a hybrid’s parents were described as sativa by the breeder who wrote the listing, which sometimes means nothing more than a certain the buds are airier or the smell sharper than the same breeder’s indica-labelled releases.
The effect people associate with a word, clear-headed instead of sedating, is governed more by terpene chemistry and by THC content than by ancestry, and a good number of “sativa-dominant” hybrids deliver a heavy couch result while plenty of the opposite stock deliver the reverse. To a buyer the label is useful for a rough hint to growth habit, flowering time and stretch; as a predictor to effect it is next to useless without the terpene notes.
Flowering time
The number of weeks from the onset of flowering and maturity, and the one most 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 an ordinary vegetative stage is a twenty-two-week plant. Seed companies also quote the shorter end of a range, since the longer end sells less seed.
Sativa plants run everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be sorted by this number, which is a sensible first step for a room on a tight timetable. A grower who allows four weeks to whatever the pack says is rarely caught out.
Equatorial
Refers to lines from regions where daylength barely changes across the year, which means that the plant never evolved a sharp response to changing days. Such plants often start flowering reluctantly at a conventional twelve-hour light cycle, since twelve hours is, for them, a mild unremarkable day and not a signal.
The working response, passed around between sativa growers for decades, is to shorten the light further: eleven hours, sometimes ten, particularly in the last weeks. It loses some yield yield and buys an earlier clearer end. A listing which says “equatorial” is warning you this with one word, and a grower that takes it as a note on geography misses the point hidden in it.
Foxtailing (and when it is not a fault)
The habit of some flowers to push out new bud growth on top of existing ones, producing towered, irregular buds instead of dense ones. In the majority of indica-leaning lines it is a heat response, usually from light too close or a room that is too high, and the advice is to fix the room.
In a good number of sativas, especially Southeast Asian and certain Haze lines, it is built in and will happen in a flawless room. A first-time sativa grower often spends a month hunting a fault that was never not a problem, lowering lights and heat only slowing a slow flower even more. The breeder seldom says which type to expect; the parentage usually tells you.