Reading Sativa Seed Packs: The Glossary

Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and most of it says a certain thing to a botanist, another to a seed company and something different again to the grower trying to make a decision in front of the pack. The failed sativa grow nearly always goes back to a word that was read in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag taken as a statement of effect, a landrace chosen like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com open as reference, because it leans heavily to the long-flowering end of the category where the vocabulary carry the most weight most; the definitions though apply to any sativa seed from any seller. They are given in no special order, because not one of them makes usable on its own without the rest.

Terpinolene (the “sativa smell”)

A terpene present in high amounts in many classic sativa strains and accounting for much of the thing growers mean as the “sativa” aroma: green, woody, lemon and faintly floral at once. It is fragile, lost easily by fast drying, and terpinolene fades more quickly in storage than the earthier terpenes that dominate indica-leaning stock.

To a seed buyer the name does two jobs. When a listing names terpinolene as the lead terpene, the line most likely has real old-sativa genetics regardless of what the label says. And when the you are after that smell to still be there by the jar, the drying is going to be slow and slow; a warm drying room flattens a terpinolene sativa to a flower that tastes of hay and no trace of what the pack promised.

Haze (the family, not the smell)

In its first sense a specific family of plants bred in 1970s California from Colombian, Thai and South Indian landraces, and then kept and worked in the Netherlands. The Haze runs tall, branches sparsely, takes for twelve to to sixteen weeks and smells of incense, pine and something sharp that no other other line quite has.

In its second sense “Haze” is whatever cross which contains a share of that family, which today is most of the sativa-leaning market. A listing which reads “Haze” without parents may be mostly percent the old family or one small fraction of it, and the grow character tracks the share, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.

Foxtailing (and when it is not a fault)

The habit of some flowers to push out new bud growth on top of old ones, producing towered, irregular buds instead of round ones. In most indica-leaning lines it is a stress symptom, usually caused by light that is too close or a room that is too high, and the standard response is to fix the room.

In a good number of sativas, especially Thai and certain Haze lines, it is built in and is going to happen in a flawless room. A first-time sativa grower often wastes weeks chasing a problem that is there, dropping lights and temperatures only delaying an already slow plant even more. The listing seldom warns which kind you should expect; the lineage usually does.

Stretch

The burst of vertical growth that follows the switch to flowering. Most tent-bred plants add half again; sativas commonly double, and a few equatorial types go further. The stretch continues three to five weeks and will not be halted once it has started, merely redirected by training.

In tent terms, the stretch multiplier is the fact worth reading ahead of choosing when to flip. A sativa flipped at sixty centimetres inside a two-metre tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers coming from indica strains almost always flip too late the first time, and the consequence is visible on the ceiling of the tent.

Landrace versus heirloom

A population of plants adapted over centuries to one place by the local growers and climate alike, and not by modern selection. Colombian, Colombian, Malawian and Mexican stock are the classic sativa cases. A landrace is a spread, not a single plant: inside a pack the flowering times, finishing times and smells range far more than in any tent-bred line, and that variation is the point of growing one.

The trap is buying a landrace as a modern product. It brings traits that made sense in an open field, including a frame no tent can contain and a flowering rhythm set to a daylength most growers cannot offer. “Heirloom” on a listing usually refers to a landrace that has been reproduced away from its origin over a number of generations, typically with a degree of selection towards indoor life; it is closer to manageable but nonetheless far from a hybrid. A shop offering “landrace” that does not give a collection point and a reproduction count is applying the word as a flavour, and the seeds should be priced with that in mind.

Latitude (outdoor sativas)

The single number that determines whether a sativa will finish outdoors, and one that no pack prints. Long-flowering plants require a run of shortening days to go on long enough to let the plant ripen; in high latitudes the frost arrives before that, and the grower harvests a unripe plant in the end of October or else loses it rot in November. The closer south, within a northern hemisphere, the later the season stretches, and coastal or subtropical gardens are able to finish lines that northern gardens cannot.

The usable reading for a seed pack: an “outdoor” sativa finishing date is given for the breeder’s home latitude, normally a point within southern Europe or the western United States, and every degree further north of that pushes the finish back into the frost. A grower above roughly the fiftieth parallel that wants a long-flowering sativa in the garden needs to be looking for a sativa autoflower or a greenhouse, not a better season.

Flowering time

The figure of weeks between the onset of flowering and maturity, and the single most frequently misunderstood figure on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started with an eight-week vegetative period is a five-month plant. Breeders also give the optimistic end of a range, because the other end moves fewer seed.

Long-flowering plants take anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range is at about 16 weeks after the switch. The catalogue can be sorted by that number, which is a reasonable first step if you have a room with a tight timetable. A grower who adds four weeks on top of whatever the pack says is rarely disappointed.

Sativa-dominant

The catalogue category and not a measurable one. It generally indicates that the larger share of a hybrid’s parents were described as sativa by the breeder who drafted the description, which occasionally signals no more than that the buds are longer or the aroma brighter than the that breeder’s indica-labelled releases.

The experience people connect with a word, lively instead of sedating, is driven more by terpene profile and by cannabinoid content than by ancestry, and plenty of “sativa-dominant” hybrids deliver a heavy sleepy result and a good number of the opposite lines do the opposite. For a buyer the label is useful as a loose hint to growth habit, flowering time and stretch; as a guide to how it feels it is next to worthless without the aroma description.

Hermaphroditism in long-flowering lines

The production of pollen-bearing flowers on a female plant, typically late in flower and often in response to stress. Almost every cannabis population carries some capacity for it; long-flowering lines express it more often, and the reason is one plain reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a missed watering to set it going, and a plant that has gone beyond its intended finish often produces a few late male sacs on its own as a last attempt to set seed.

Not one of these means a sativa strain unstable by course; it makes the room’s discipline matter over longer. A sealed room, stable conditions and harvesting when the plant is done and not a week later remove the greater part of the risk. A listing which states the breeder screens parents for intersex traits is saying something more for a long-flowering line than for any else.

Equatorial

Refers to plants out of latitudes where daylength hardly changes through the year, which means that the plant never develop a sharp reaction to changing days. Such lines frequently flower slowly at a conventional twelve-hour schedule, since twelve hours is, for them, an unremarkable day rather than a signal.

The practical fix, passed around among sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, particularly during the last weeks. It costs some little yield and gains an earlier clearer end. A listing which uses “equatorial” is warning you this with one word, and a grower that takes it as a note on origin has missed the instruction inside it.