Decoding Sativa Seed Packs: The Glossary

Sativa seeds come with more jargon around them than any other category of cannabis seed, and a good deal of it means one thing to a botanist, something else to a breeder and a third to the person standing in front of the pack. A failed sativa grow nearly always goes back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of character, a landrace chosen like it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as the concrete examples, since it runs strongly towards the long-flowering end of the category and that is where the vocabulary matter most; the meanings though hold to any sativa seed from any shop. They are given in no particular order, since not one of them is usable without the others.

Foxtailing (and when it is not a fault)

The tendency of some flowers to grow fresh calyx growth on top of existing ones, producing towered, irregular buds rather than dense ones. In most indica-leaning strains it is a stress symptom, typically from light that is too close or temperatures that is too high, and the advice is to correct the cause.

In many sativas, above all Southeast Asian and some Haze lines, it is built in and will occur under a flawless room. A first-time sativa grower often wastes a month chasing a fault that was never not a problem, lowering lights and temperatures only delaying an already slow flower further. The breeder rarely warns which kind to expect; the parentage usually does.

Equatorial

Refers to lines out of regions in which daylength hardly varies across the year, which means that the plant never evolved a sharp reaction to changing days. These lines frequently start flowering reluctantly at a conventional twelve-hour schedule, because twelve hours is, for them, an unremarkable day rather than a signal.

The working fix, passed around among sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, especially in the last weeks. It costs some little yield and buys an earlier clearer finish. A listing that says “equatorial” is warning you this with one word, and a grower that takes it as a note on geography has missed the instruction inside it.

Latitude (outdoor sativas)

The single figure that decides whether a sativa will finish outdoors, and one no pack states. Equatorial plants require a run of shortening days to go on late enough to let the plant to finish; in northern latitudes the frost arrives first, and the grower cuts a half-finished plant in late October or watches it to mould in November. The closer south, within a northern hemisphere, the longer the season runs, and coastal and low-latitude gardens are able to finish lines that temperate gardens cannot.

The practical reading of a seed pack: an “outdoor” line finishing date is given 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 back towards the weather. A grower above about the fiftieth parallel who wants a true sativa in the garden is looking for an autoflower or a greenhouse, not a better season.

Landrace versus heirloom

A population of plants adapted over centuries to one place by local climate and climate together, rather than by deliberate selection. Colombian, Thai, Congolese and Mexican lines are the classic sativa examples. A landrace is variable, rather than a one plant: within a pack the heights, flowering times and aromas range widely than in a tent-bred line, and this spread is the point of growing one.

The mistake is buying a landrace as a modern product. It carries habits that make sense in an equatorial field, including height no tent can hold and a flowering clock tuned to an daylength most growers never offer. “Heirloom” on a listing usually refers to a landrace that has been reproduced somewhere over some generations, typically with a degree of selection towards indoor life; it is nearer to usable but nonetheless not uniform. A seller listing “landrace” without an collection region and a reproduction history is using the word loosely, and the seeds should be priced accordingly.

Stretch (the doubling)

The surge of upward growth which comes after the switch to flowering. Indica-leaning plants gain around half their height again; sativas routinely double, and a few landrace lines triple. The stretch lasts two to four weeks and will not be stopped after it begins, merely redirected by training.

In practical terms, a stretch figure is a fact to reading ahead of choosing when to switch. A sativa flipped at sixty centimetres centimetres in a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. People moving from indica stock nearly always switch too late the first time, and the lesson is written on the ceiling of the tent.

Sativa-dominant (the label)

The marketing term rather than a botanical one. It usually indicates that more of a hybrid’s parents are classed as sativa according to the breeder who drafted the listing, and occasionally means no more than a certain the flowers are airier or the smell sharper than the same breeder’s other lines.

The effect people associate with the word, lively instead of sedating, is governed far more by terpene profile and by cannabinoid content than it is by the sativa fraction, and a good number of “sativa-dominant” releases deliver a heavy sleepy result and plenty of indica-labelled lines do exactly the opposite. For a grower the percentage is worth something for a loose guide to growth habit, flowering time and stretch; as a predictor to effect it is next to worthless without the terpene description.

Flowering time (and what it is counted from)

The figure of weeks between the start of flowering and harvest, and the single most misunderstood figure on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, not from sowing, so a “fourteen-week” sativa grown after an eight-week vegetative stage is a twenty-two-week plant. Seed companies also give the shorter end of the range, because the longer end sells fewer seed.

Sativa plants take anywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks after the switch. The catalogue can be sorted by that number, which is the reasonable first step for a grower on a fixed schedule. A grower who adds four weeks on top of whatever the pack states is seldom disappointed.

Terpinolene

A terpene present in large proportion in many classic sativa strains and accounting for much of what growers mean as the “sativa” aroma: fresh, piney, lemon and faintly sweet all at once. It is volatile, driven off quickly through fast drying, and terpinolene fades faster in storage than the earthier terpenes that lead most tent stock.

For a seed buyer the name does two things. When a listing names terpinolene among the leading terpene, the strain most likely carries real Haze-era genetics regardless of what the label claims. And when the grower wants that smell to still be there by the jar, the drying has to be cool and cool; a fast dry flattens a terpinolene sativa to a flower that smells of very little and leaves nothing of what the pack promised.

Hermaphroditism in long-flowering lines

The production of pollen-bearing flowers on a female plant, usually towards the end in flower and often under stress. Every cannabis line carries a degree of capacity for it; sativa lines express it more, for one simple reason: fourteen weeks of flower is sixteen weeks of opportunity for a light leak, a temperature spike or a missed watering that can trigger it going, and a old that has already waited beyond its intended finish often throws a few desperate pollen flowers on its own in a final effort to make seed.

None of these makes a sativa strain weak by course; it makes the grower’s consistency matter over longer. A sealed tents, steady temperatures and harvesting when the plant is ready and not two weeks later take away the greater part of the risk. A listing that states the breeder screens parents for hermaphrodite tendency is worth worth hearing on a long-flowering line than on any other category.

Haze (the family, not the smell)

Originally a particular line of plants bred in coastal California from Mexican, Colombian and Thai landraces, and then preserved and worked in the Netherlands. The Haze grows tall, branches sparsely, flowers for twelve to sixteen weeks and smells of spice, pine and something sharp that no other line exactly has.

In its second sense “Haze” is any hybrid that carries some of that family, which by now is most of the sativa-leaning catalogue. A listing which says “Haze” without parents could be mostly percent the classic family or one sixteenth of it, and the grow time tracks the share, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.