Sativa seeds arrive with more vocabulary around them than any other kind 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 standing in front of the listing. The failed sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag taken as a statement of effect, a landrace chosen as if it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as the concrete examples, because it runs strongly towards the classic end of the spectrum where the words matter most; the meanings themselves hold to any sativa seed from any shop. They are in no particular order, since not one of them makes sense on its own without the rest.
Haze (the family, not the smell)
In its first sense a particular family of plants put together in 1970s California from Colombian, Thai and Thai parents, and later preserved and worked in the Netherlands. A true Haze runs tall, branches openly, takes for twelve to sixteen weeks and carries a scent of incense, citrus and something sharp that no line quite has.
In its looser sense “Haze” is any hybrid that contains some of that family, which by now is most of the sativa-leaning catalogue. A listing which says “Haze” and gives no lineage may be eighty percent original old family or a sixteenth of it, and the flowering character follows the fraction, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.
Latitude (outdoor sativas)
The one number that decides if a sativa can ripen outdoors, and one no pack prints. Long-flowering plants require a autumn days to continue long enough for the plant to finish; in high latitudes the frost arrives first, and the grower cuts an unripe plant in late October or watches it to mould in November. A closer to the equator, in the northern hemisphere, the later the window runs, and Mediterranean or low-latitude gardens can finish lines that temperate gardens cannot.
The practical reading of a seed pack: an “outdoor” line harvest date is stated for the breeder’s own latitude, usually somewhere within southern Europe or the west coast of the United States, and every step further north of that moves the finish later into the weather. A grower north of roughly the fiftieth parallel that wants a long-flowering sativa outdoors is looking for a sativa autoflower or else a greenhouse, and not a longer summer.
Terpinolene
A aromatic compound present in high proportion in a lot of old sativa strains and responsible for most of the thing growers mean as a “sativa” aroma: green, piney, lemon and slightly sweet all at once. It is fragile, driven off quickly by fast drying, and it fades faster in storage than the heavier terpenes which lead most tent lines.
To a seed buyer the word does two things. Where a listing names terpinolene among the leading aromas, the line probably carries substantial old-sativa genetics regardless of what the percentage claims. And when the grower are after that profile to still be there to the jar, the drying has to be cool and slow; a fast drying room flattens a terpinolene sativa into a flower that tastes of very little and leaves nothing of what the pack described.
Landrace
A population of plants adapted over centuries to one place by local climate and climate alike, and not by modern breeding. Colombian, Thai, Malawian and Oaxacan lines are the sativa examples. A landrace is variable, not a single plant: within a pack the flowering times, finishing times and smells range far more than in any tent-bred hybrid, and that variation is the whole value of keeping one.
The mistake is treating a landrace as a modern hybrid. It brings habits that make sense in an open field, such as height that no tent can contain and a flowering clock tuned to a daylength most growers cannot offer. “Heirloom” on a listing usually refers to a landrace that has been grown out somewhere over some generations, often with a degree of selection for indoor conditions; it is nearer to usable but still not uniform. A shop listing “landrace” that does not give a origin region and a generation history is applying the word as a flavour, and the pack should be judged accordingly.
Intersex tendency
The production of male flowers on a female plant, typically late in flower and frequently under stress. Almost every cannabis line has a degree of capacity to do; long-flowering lines express it more, and the reason is a simple one: sixteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a late watering to trigger it off, and a plant plant has already waited past its intended finish frequently throws a few desperate pollen sacs on its own in a final attempt to set seed.
None of this means a sativa strain weak by nature; it means the grower’s consistency matter over longer. Light-tight room, stable conditions and harvesting when the plant is ready rather than two week after remove the greater part of the problem. A listing which states the breeder tests parents for hermaphrodite traits is worth worth hearing for a sativa than on any else.
Sativa-dominant
A catalogue category rather than a measurable one. It usually means that the larger share of a hybrid’s lineage were described as sativa by the breeder who wrote the listing, which occasionally signals no more than that the buds are longer or the aroma brighter than the same breeder’s indica-labelled lines.
The effect people associate with a word, lively rather than heavy, is driven more by terpene chemistry and by cannabinoid balance than it is by ancestry, and a good number of “sativa-dominant” hybrids produce a heavy couch result and a good number of the opposite lines do exactly the opposite. For a buyer the label is useful for a rough hint to growth habit, flowering time and stretch; as a predictor to how it feels it is close to worthless unless accompanied by the terpene notes.
Foxtailing
The tendency of some flowers to push out fresh bud growth on top of old ones, producing towered, irregular buds instead of dense ones. In the majority of tent-bred strains it is a stress 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 Southeast Asian and some Haze hybrids, it is built in and will happen in a flawless room. A new sativa grower frequently wastes weeks chasing a problem that is a problem, dropping lights and heat and slowing a slow plant further. The breeder rarely says which kind you should expect; the lineage usually does.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and maturity, and the one most frequently misread number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started with an ordinary vegetative period is a five-month plant. Breeders also quote the shorter end of the spread, since the longer end sells fewer seed.
Sativa plants run everywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range comes in at around 16 weeks after the switch. The catalogue can be sorted by this figure, which is the reasonable first step for a room on a fixed schedule. A grower who adds four weeks to the figure the pack states is rarely disappointed.
Equatorial
Refers to plants out of regions where daylength hardly varies through 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 schedule, because twelve hours is, to them, an unremarkable day rather than a signal.
The practical response, handed around between sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, especially in the final weeks. It costs some yield yield and gains a more clearer finish. A listing which says “equatorial” is telling you about this with one word, and a grower that reads it as mere origin misses the point hidden in it.
Stretch
The burst of vertical growth that follows the switch to flowering. Most tent-bred plants add half again; sativas routinely double, and some equatorial types triple. The stretch lasts three to four weeks and will not be halted after it begins, merely redirected by training.
In tent terms, the stretch figure is a fact to reading before deciding when to switch. A sativa switched at sixty centimetres inside a standard tent is at the lamp before week four of flower; one switched at thirty centimetres has room. Growers moving over from indica strains almost always switch far too late the first time, and the consequence is written on the ceiling of the tent.