Sativa seeds come with more jargon around them than any other category of cannabis seed, and a good deal of it says one thing to a botanist, something else to a breeder and something different again to the person standing in front of the listing. The failed sativa grow usually goes back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” label 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 open as reference, since it runs strongly to the classic end of the spectrum where the words matter most; the definitions though hold to any sativa seed from any seller. They are in no particular order, since none of them makes sense without the others.
Latitude (outdoor sativas)
The one figure that decides if a sativa will finish outdoors, and a number that no pack states. Equatorial plants need a run of shortening days to continue late enough to let the plant to ripen; in high latitudes the frost arrives first, and the grower cuts an unripe plant in late October or watches it rot in November. A further to the equator, within the northern hemisphere, the later the window stretches, and coastal and subtropical gardens can ripen plants that northern growers cannot.
The practical rule for a seed pack: an “outdoor” line finishing date is stated for the breeder’s home latitude, normally somewhere within temperate Europe or the west coast of the United States, and each step north of it moves the finish later into the weather. A grower north of about the fiftieth parallel that is after a true sativa outdoors needs to be shopping for an autoflower or else a covered space, and not a longer summer.
Equatorial
Refers to lines from regions in which daylength hardly changes across the year, which means where the plant does not develop a strong reaction to changing days. These plants frequently flower reluctantly under a standard twelve-hour light cycle, since twelve hours is, for them, a mild ordinary day and not a signal.
The practical response, passed around among sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, particularly during the last weeks. It loses a little yield and gains an more decisive finish. A listing which uses “equatorial” is telling you about this with one word, and a grower who takes it as mere geography misses the instruction inside it.
Landrace versus heirloom
A population of plants shaped through generations to one region by the local growers and climate alike, and not by modern breeding. Colombian, Colombian, Malawian and Oaxacan stock are the classic sativa cases. A landrace is variable, not a single plant: within a pack the flowering times, finishing times and aromas range far more than in any tent-bred hybrid, and that spread is the point of growing one.
The mistake is buying a landrace as a modern hybrid. It brings traits that make sense in an open field, including a frame no tent can contain and a flowering clock tuned to an equatorial daylength the majority of growers cannot provide. “Heirloom” in a listing usually means a landrace that has been reproduced somewhere over a number of generations, often with a degree of selection towards indoor life; it is nearer to usable but nonetheless far from a hybrid. A seller listing “landrace” without an origin point and a reproduction history is using the word loosely, and the pack should be priced accordingly.
Stretch
The burst of vertical growth which follows the change to flowering. Indica-leaning plants add around half again; sativas routinely double, and a few landrace lines go further. The stretch continues three to four weeks and cannot be halted once it has started, merely redirected by training.
In practical terms, the stretch figure is a number to read ahead of choosing when to flip. A sativa flipped at sixty centimetres in a standard tent is at the lamp by week four of flower; one switched at thirty centimetres has room. People coming from indica strains almost always switch too late the first time, and the consequence is visible on the ceiling of the tent.
Terpinolene (the “sativa smell”)
A terpene found in high amounts in a lot of classic sativa strains and accounting for most of what people mean as the “sativa” smell: fresh, piney, citrus and faintly floral all at once. It is volatile, lost easily by hot drying, and it degrades more quickly in the cure than the earthier terpenes which dominate most tent lines.
For a seed buyer the name does two jobs. When a listing lists terpinolene as the lead aromas, the strain probably has substantial old-sativa ancestry whatever the percentage says. And when the grower are after that profile to survive to the jar, the drying has to be cool and cool; a fast dry flattens a terpinolene sativa into a flower that tastes of very little and no trace of what the pack described.
Haze (the family, not the smell)
In its first sense a specific line of plants put together in coastal California from Mexican, Thai and South Indian landraces, and later preserved and worked in the Netherlands. The Haze grows tall, fills out openly, takes for twelve to to sixteen weeks and carries a scent of incense, pine and something metallic that no other other line quite has.
In its second sense “Haze” is whatever cross that carries some of that family, which by now is a great many of the sativa-leaning catalogue. A listing that reads “Haze” without lineage could be mostly percent the classic family or a small fraction of it, and the grow time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Sativa-dominant (the label)
A marketing category and not a botanical one. It usually means that the larger share of a hybrid’s parents were described as sativa according to the breeder who drafted the description, and sometimes means no more than that the flowers are airier or the smell brighter than the that breeder’s other lines.
The experience people associate with a word, lively rather than heavy, is governed far more by terpene chemistry and the THC content than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids deliver a flat couch result while plenty of indica-labelled stock do the opposite. To a grower the label is worth something as a loose hint to growth habit, flowering time and stretch; as a predictor to effect it is next to useless without the terpene description.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and maturity, which is the one most misread figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, not from sowing, so a “fourteen-week” sativa started after a eight-week vegetative period is a twenty-two-week plant. Seed companies also quote the shorter end of the spread, since the longer end moves less seed.
Long-flowering lines take anywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be filtered by this number, which is the reasonable first step if you have a grower on a fixed timetable. A grower who allows four weeks to whatever the pack says is seldom disappointed.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently in response to stress. Almost every cannabis line carries a degree of tendency for do; sativa lines express it more often, and the reason is a plain one: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a temperature spike or a missed watering to set it off, and a plant that has waited past its intended finish frequently throws a few desperate pollen flowers on its own as a last effort to make seed.
None of these makes a sativa strain weak by course; it makes the room’s discipline matter over longer. A sealed room, steady temperatures and cutting the moment the plant is done and not a week after take away most of the risk. A listing which states the breeder screens parents for hermaphrodite tendency is worth more for a long-flowering line than on any else.
Foxtailing
The tendency of some flowers to grow fresh bud growth on top of old ones, giving spired, irregular buds rather than round ones. In the majority of indica-leaning lines it is a stress response, usually from light too close or a room that is too high, and the standard response is to correct the room.
In a good number of sativas, especially Thai and some Haze hybrids, it is built in and will occur under a perfect room. A new sativa grower frequently wastes a month hunting a fault that is not there, lowering lights and temperatures only delaying a slow plant even more. The listing seldom says which kind to expect; the lineage usually tells you.
