Sativa seeds arrive with more vocabulary around them than any other kind of cannabis seed, and a good deal of it means a certain thing to a botanist, something else 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 traces back to a word that was read in the wrong sense: a flowering time read as a fixed number, a “sativa-dominant” label read as a statement of effect, a landrace chosen like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com open for the concrete examples, since it runs heavily to the classic end of the spectrum where the words carry the most weight most; the meanings themselves apply to any sativa seed from any shop. They are in no special order, because none of them is usable without the others.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, typically towards the end in flower and often under stress. Almost every cannabis line carries some capacity to do; long-flowering lines express it more, and the reason is a plain reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a late watering to trigger it going, and a old plant has already waited past its intended end often produces a few late pollen flowers on its own as a final attempt to make seed.
None of these makes a sativa line weak by nature; it means the room’s consistency count over longer. A sealed tents, stable conditions and harvesting when the plant is done and not two week after remove most of the risk. A listing that states a breeder tests parents for hermaphrodite tendency is worth worth hearing for a sativa than for anything other category.
Foxtailing (and when it is not a fault)
The tendency of some flowers to grow fresh bud growth on top of old ones, giving towered, irregular buds rather than round ones. In the majority of indica-leaning lines it is a heat response, usually from light that is too close or temperatures too high, and the advice is to correct the room.
In a good number of sativas, especially Thai and certain Haze hybrids, it is built in and will happen under a flawless room. A first-time sativa grower frequently spends a month chasing a fault that is not a problem, dropping lights and heat and slowing a slow flower further. The breeder rarely warns which type you should expect; the parentage generally does.
Latitude
The single number that decides whether a sativa can finish outdoors, and one that no pack states. Equatorial lines require a autumn days to continue long enough to let the plant to finish; at northern latitudes the frost arrives before that, and the grower cuts an unripe plant in late October or else watches it rot in November. A further to the equator, within a northern hemisphere, the longer the window stretches, and Mediterranean or subtropical growers are able to finish lines that northern growers never will.
The practical rule of a seed pack: an “outdoor” line finishing month is stated for the breeder’s home latitude, normally somewhere within temperate Europe or the western United States, and each degree further north of it moves the finish later towards the weather. A grower above roughly the fiftieth parallel who is after a long-flowering sativa in the garden needs to be looking for an autoflower or else a covered space, not a longer season.
Equatorial (the twelve-hour problem)
Refers to plants out of regions where daylength hardly changes across the year, and where the plant never evolved a sharp response to changing days. Such plants frequently flower reluctantly at a conventional twelve-hour light cycle, since twelve hours is, to them, a mild ordinary day and not a signal.
The practical response, passed around among sativa growers for decades, is to cut the light more: eleven hours, sometimes ten, particularly during the last weeks. It costs a yield yield and buys a earlier decisive finish. A listing which uses “equatorial” is warning you this with one word, and a grower who reads it as a note on origin misses the instruction inside it.
Haze (the family, not the smell)
Originally a particular family of plants bred in coastal California from Colombian, Thai and South Indian parents, and then kept and refined in the Netherlands. The Haze runs tall, fills out sparsely, flowers for twelve to sixteen weeks and carries a scent of spice, citrus and a note metallic that no other line exactly has.
In its looser sense “Haze” is any hybrid that contains some of that family, and by now is a great many of the sativa-leaning market. A listing which reads “Haze” without parents could be mostly percent the old family or one sixteenth of it, and the grow time tracks the fraction, not the name. The working question is never “is it a Haze” but “how much, and through which parent”.
Landrace versus heirloom
A population of plants adapted through centuries to a particular place by local growers and climate together, rather than by modern selection. Thai, Colombian, Malawian and Mexican stock are the classic sativa cases. A landrace is a spread, not a single plant: inside a pack the heights, finishing times and aromas range widely than in any tent-bred line, and this spread is the whole value of keeping one.
The trap is treating a landrace like a modern product. It carries traits that made sense in an open field, such as a frame no tent can hold and a flowering clock set to a equatorial daylength most growers cannot offer. “Heirloom” on a listing generally means a landrace that has been grown out away from its origin over a number of generations, typically with light selection for tent conditions; it is closer to usable but nonetheless far from a hybrid. A seller offering “landrace” that does not give an origin point and a generation history is using the word as a flavour, and the seeds should be priced accordingly.
Terpinolene (the “sativa smell”)
A aromatic compound present in high amounts in many classic sativa strains and responsible for much of the thing people mean as a “sativa” smell: green, piney, citrus and faintly sweet all at once. It is volatile, lost quickly through hot drying, and it fades more quickly in storage than the heavier terpenes that lead indica-leaning stock.
For a seed buyer the name does two jobs. When a listing names terpinolene as the lead aromas, the line probably has real Haze-era ancestry whatever the label says. And where the grower are after that smell to survive to the jar, the cure is going to be slow and cool; a warm drying room flattens a terpinolene sativa to a flower that tastes of hay and nothing of what the pack promised.
Sativa-dominant
The marketing term and not a measurable one. It generally indicates that more of a hybrid’s lineage were classed as sativa by whoever drafted the listing, which sometimes means nothing more than a certain the buds are airier or the aroma sharper than the that breeder’s other lines.
The experience people connect with the word, clear-headed rather than sedating, is driven more by terpene chemistry and the THC balance than it is by ancestry, and a good number of “sativa-dominant” hybrids produce a flat couch effect while plenty of the opposite lines do exactly the reverse. To a grower the percentage is worth something for a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is close to worthless without the aroma description.
Stretch
The burst of upward growth that comes after the change to flowering. Most tent-bred plants gain around half their height again; sativas routinely double, and some landrace lines triple. The stretch lasts three to four weeks and cannot be halted after it has started, only bent sideways by training.
In practical terms, the stretch figure is the number to reading before choosing when to flip. A sativa flipped at sixty centimetres centimetres in a standard tent is at the lamp by week four of flower; one switched at thirty centimetres has room. Growers coming from indica strains almost always switch far too late the first time, and the lesson is written on the ceiling of the tent.