A Working Glossary for Sativa Seed Buyers

Sativa seeds come with more jargon attached 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 pack. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time taken as a fixed number, a “sativa-dominant” label taken as a description of character, a landrace bought 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 leans heavily towards the classic end of the spectrum where the words matter most; the meanings themselves apply to any sativa seed from any shop. They are given in no particular order, because none of them is usable without the others.

Stretch

The burst of upward growth that follows the change to flowering. Most tent-bred plants add around half again; sativas routinely double, and a few landrace lines go further. The stretch continues three to five weeks and cannot be stopped after it has started, merely redirected by training.

In tent terms, the stretch multiplier is the fact to read before deciding when to flip. A sativa flipped at sixty centimetres centimetres inside a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. Growers moving from indica stock almost always flip far too late the first time, and the lesson is written on the ceiling of the tent.

Haze

Originally a specific family of plants put together in 1970s California from Colombian, Thai and South Indian parents, and then kept and worked in the Netherlands. The Haze runs tall, branches openly, flowers for twelve to to sixteen weeks and carries a scent of incense, pine and something sharp that no line quite reproduces.

In its looser sense “Haze” is any cross which carries some of that family, and by now is a great many of the sativa-leaning market. A listing that says “Haze” without lineage could be mostly percent original old family or one 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”.

Foxtailing

The tendency of some flowers to push out fresh bud clusters on top of existing ones, giving towered, open buds instead of round ones. In the majority of indica-leaning lines it is a heat response, usually from light too close or temperatures too high, and the advice is to fix the cause.

In a good number of sativas, above all Thai and certain Haze hybrids, it is built in and will occur in a flawless room. A first-time sativa grower frequently spends a month chasing a problem that was never a problem, dropping lights and heat only slowing a slow flower further. The breeder rarely says which kind to expect; the parentage generally does.

Latitude

The one number that decides if a sativa can ripen outdoors, and a number that no pack prints. Equatorial plants require the run of shortening days to continue long enough for the plant to ripen; in high latitudes the frost comes before that, and the grower harvests a half-finished plant in the end of October or loses it rot in November. A further to the equator, within the northern hemisphere, the longer the season runs, and coastal and low-latitude gardens can finish lines that northern gardens cannot.

The practical reading for a seed listing: an “outdoor” line harvest date is stated for the breeder’s home latitude, normally a point in temperate Europe or the western United States, and each step north of it pushes the date later into the weather. A grower north of roughly the fiftieth parallel that wants a true sativa in the garden needs to be looking for a sativa autoflower or else a covered space, not a longer summer.

Flowering time

The figure of weeks between the onset of flowering and harvest, and the single most frequently misread figure on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa grown after a eight-week vegetative period is a five-month plant. Seed companies additionally give the shorter end of a range, because the other end moves less seed.

Sativa plants run everywhere from ten weeks to more than twenty, and the slowest line in the Haze Sativa Seeds range is at about 16 weeks from the flip. The catalogue can be filtered by that number, which is the sensible first pass for a room on a tight schedule. A grower who allows four weeks to whatever the pack says is rarely disappointed.

Hermaphroditism in long-flowering lines

The production of male flowers on a female plant, typically towards the end in flower and frequently in response to stress. Every cannabis line carries some tendency for it; long-flowering plants express it more, and the reason is one simple one: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a missed watering that can trigger it going, and an old plant has waited past its natural end frequently throws a few desperate pollen flowers on its own as a final attempt to make seed.

Not one of this means a sativa strain weak as a matter of course; it makes the grower’s discipline matter for longer. A sealed room, stable conditions and cutting when the plant is done rather than two week later remove most of the problem. A listing that states the breeder screens parents for hermaphrodite tendency is saying something more on a sativa than for any other category.

Equatorial (the twelve-hour problem)

Describes lines out of latitudes in which daylength hardly changes through the year, which means where the plant does not develop a strong reaction to changing days. Such plants frequently flower reluctantly at a standard twelve-hour light cycle, because twelve hours is, to them, a mild unremarkable day rather than a signal.

The practical fix, handed down between sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, particularly during the last weeks. It costs some yield yield and gains a more decisive end. A listing that says “equatorial” is warning you about this with one word, and a grower that takes it as a note on geography has missed the instruction hidden in it.

Terpinolene (the “sativa smell”)

A aromatic compound found in high amounts in a lot of old sativa lines and accounting for most of the thing people describe as the “sativa” smell: fresh, piney, citrus and faintly floral all at once. It is volatile, lost quickly by fast drying, and terpinolene fades more quickly in storage than the heavier terpenes which lead indica-leaning lines.

For a seed buyer the word earns two jobs. When a listing lists terpinolene among the lead terpene, the strain most likely carries substantial Haze-era genetics whatever the percentage claims. And where the grower are after that profile to still be there by the jar, the cure is going to be cool and cool; a warm dry turns a terpinolene line to something that smells of very little and leaves no trace of what the pack described.

Landrace

A population of plants adapted through centuries to one place by local growers and growers together, rather than by modern selection. Colombian, Thai, Malawian and Oaxacan lines are the classic sativa cases. A landrace is variable, rather than a single plant: inside a pack the flowering times, flowering times and smells spread far more than any tent-bred hybrid, and this variation is the point of growing one.

The trap is buying a landrace like a modern hybrid. It brings traits that made sense in an open field, such as a frame no tent can hold and a flowering clock tuned to an daylength most growers never offer. “Heirloom” in a listing usually means a landrace that has been grown out somewhere over some generations, often with light selection for tent conditions; it is closer to usable but nonetheless not uniform. A seller listing “landrace” without an origin point and a reproduction count is using the word as a flavour, and the pack should be priced with that in mind.

Sativa-dominant

A catalogue term rather than a botanical one. It generally means that the larger share of a hybrid’s lineage were described as sativa according to whoever drafted the listing, which sometimes signals nothing more than a certain the flowers are longer or the smell brighter than the that breeder’s indica-labelled releases.

The experience people associate with a word, lively rather than heavy, is driven more by terpene chemistry and by THC balance than by ancestry, and plenty of “sativa-dominant” hybrids deliver a flat couch result and a good number of the opposite lines do the reverse. To a grower the label is useful as a loose guide to growth habit, flowering time and stretch; for a guide to how it feels it is close to worthless without the terpene notes.