Sativa seeds arrive with more vocabulary attached than any other kind of cannabis seed, and most of it means a certain thing to a botanist, something else to a breeder and a third to the person trying to make a decision in front of the listing. The failed sativa grow usually traces back to a word that was read in the wrong one of those senses: 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 to hand as reference, since it leans strongly towards the long-flowering end of the category and that is where the vocabulary carry the most weight most; the definitions though apply to any sativa seed from any shop. They are given in no particular order, since none of them makes usable on its own without the rest.

Hermaphroditism in long-flowering lines

The production of pollen-bearing flowers on a female plant, usually towards the end in flower and frequently in response to stress. Every cannabis population carries a degree of tendency to do; long-flowering plants show it more often, and the reason is a simple reason: 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 an plant plant has already gone beyond its intended finish frequently produces a few desperate male sacs on its own as a final effort to set seed.

None of these makes a sativa strain unstable as a matter of nature; it makes the grower’s discipline matter over longer. Light-tight room, stable conditions and harvesting the moment the plant is ready and not a week after take away the greater part of the problem. A listing which mentions a breeder screens parents for hermaphrodite traits is saying something more on a sativa than on anything other category.

Stretch (the doubling)

The surge of upward growth which follows the switch to flowering. Indica-leaning plants gain around half again; sativas routinely double, and some equatorial lines go further. The stretch lasts three to five weeks and cannot be halted once it has started, only bent sideways by training.

In practical terms, the stretch multiplier is a number worth read ahead of choosing when to switch. A sativa flipped at sixty centimetres inside a standard tent is touching the lamp before week four of flower; one switched at thirty centimetres centimetres has room. People coming from indica stock almost always flip far too late the first time, and the lesson is written on the ceiling of the tent.

Landrace

A population of plants adapted through generations to one place by the local climate and growers alike, rather than by deliberate breeding. Thai, Colombian, Malawian and Oaxacan lines are the classic sativa examples. A landrace is variable, not a one plant: within a pack the flowering times, flowering times and aromas range widely than a tent-bred line, and this variation is the point of growing one.

The mistake is treating a landrace like a finished product. It carries traits that made sense in an equatorial field, such as height that no tent can hold and a flowering clock set to a daylength the majority of growers cannot offer. “Heirloom” in a listing usually means a landrace that has been reproduced away from its origin for some generations, often with a degree of selection towards tent conditions; it is nearer to usable but still far from a hybrid. A seller listing “landrace” without a collection region and a generation count is applying the word loosely, and the pack should be priced with that in mind.

Equatorial

Refers to plants out of regions where daylength hardly varies across the year, which means where the plant never develop a sharp reaction to shortening days. Such plants often start flowering slowly under a standard twelve-hour schedule, since twelve hours is, for them, an ordinary day and not a signal.

The practical response, passed down among sativa growers for decades, is to shorten the light further: eleven hours, sometimes ten, especially during the last weeks. It loses some little yield and buys an earlier clearer end. A listing which says “equatorial” is telling you this in one word, and a grower that takes it as a note on geography has missed the instruction inside it.

Sativa-dominant (the label)

The catalogue category and not a botanical one. It generally means that more of a hybrid’s lineage are classed as sativa by the breeder who wrote the description, and occasionally means no more than that the flowers are airier or the smell sharper than the same breeder’s indica-labelled releases.

The effect people connect with the word, lively instead of heavy, is driven far more by terpene chemistry and by cannabinoid balance than it is by ancestry, and a good number of “sativa-dominant” hybrids deliver a flat sleepy effect while a good number of indica-labelled stock deliver the reverse. To a grower the percentage is useful for a rough hint to growth habit, flowering time and stretch; for a guide to how it feels it is next to useless without the terpene description.

Latitude (outdoor sativas)

The single number that determines whether a sativa will ripen outdoors, and a number that no pack prints. Equatorial plants need a autumn days to continue late enough to let the plant ripen; at northern latitudes the frost comes first, and the grower cuts a unripe plant in late October or else loses it to mould in November. A further south, within the northern hemisphere, the longer the window stretches, and Mediterranean or subtropical gardens can ripen plants that northern gardens cannot.

The practical reading for a seed listing: an “outdoor” line harvest month is given for the breeder’s home latitude, usually a point in temperate Europe or the western United States, and each step north of it pushes the finish back towards the weather. A grower north of roughly the fiftieth parallel who is after a true sativa outdoors needs to be shopping for an autoflower or else a covered space, and not a better season.

Terpinolene

A aromatic compound found in large proportion in many old sativa lines and responsible for much of what growers mean as the “sativa” aroma: fresh, woody, lemon and slightly floral all at once. It is volatile, lost quickly by hot drying, and it degrades more quickly during the cure than the heavier terpenes which lead most tent lines.

To a seed buyer the word does two things. When a listing lists terpinolene as the lead terpene, the strain probably carries real Haze-era ancestry whatever the percentage claims. And where the grower wants that smell to still be there by the jar, the cure has to be slow and cool; a fast drying room turns a terpinolene line to a flower that smells of hay and leaves nothing of what the pack promised.

Haze

Originally a particular family of plants bred in coastal California from Colombian, Colombian and Thai parents, and then preserved and worked in the Netherlands. A true Haze runs tall, branches openly, flowers for twelve to to sixteen weeks and smells of incense, pine and something metallic that no line exactly reproduces.

In its looser sense “Haze” is whatever cross that contains some of that family, which today is a great many of the sativa-leaning market. A listing which says “Haze” and gives no parents could be mostly percent original classic family or one sixteenth of it, and the flowering time tracks the share, not the name. The working question is never “is it a Haze” but “how much, and through which parent”.

Flowering time

The number of weeks from the onset of flowering and harvest, which is the one most frequently misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa started with a ordinary vegetative period is a five-month plant. Seed companies additionally give the shorter end of the range, because the other end sells less seed.

Sativa lines take anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks after the flip. The catalogue can be filtered by this number, which is the reasonable first step if you have a room on a tight schedule. A grower who adds four weeks to whatever the pack states is seldom disappointed.

Foxtailing

The habit of certain flowers to grow fresh calyx clusters on top of old ones, giving spired, irregular buds rather than round ones. In most indica-leaning lines it is a heat response, typically caused by light too close or a room too high, and the advice is to fix the cause.

In a good number of sativas, above all Southeast Asian and some Haze hybrids, it is genetic and will happen under a flawless room. A first-time sativa grower often wastes weeks hunting a problem that was never not a problem, dropping lights and heat and delaying a slow flower further. The breeder rarely warns which type to expect; the parentage generally does.