Decoding Sativa Seed Packs: The Glossary

Sativa seeds come with more jargon around them than any other kind of cannabis seed, and a good deal of it says one thing to a botanist, something else to a seed company and a third to the grower standing in front of the listing. The disappointing sativa grow nearly always traces back to a word that was read in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” label taken as a statement of character, a landrace chosen like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com open for reference, since it leans heavily to the long-flowering end of the spectrum and that is where the words matter most; the meanings though apply to any sativa seed from any shop. They are in no particular order, since not one of them makes usable without the others.

Latitude (outdoor sativas)

The single figure that decides if a sativa will ripen outdoors, and one that no pack states. Long-flowering lines need the run of shortening days to continue late enough for the plant finish; in northern latitudes the frost comes first, and the grower cuts a half-finished plant in late October or loses it rot in November. The closer south, in the northern hemisphere, the later the window runs, and Mediterranean or low-latitude growers are able to ripen plants that northern gardens never will.

The usable reading for a seed pack: an “outdoor” line finishing date is given for the breeder’s own latitude, usually somewhere in temperate Europe or the west coast of the United States, and each degree further north of it pushes the date later towards the frost. A grower north of roughly the fiftieth parallel who wants a true sativa outdoors is looking for a sativa autoflower or else a greenhouse, and not a longer summer.

Hermaphroditism in long-flowering lines

The production of male flowers on a female plant, typically late in flower and often under stress. Almost every cannabis line has some capacity for it; sativa lines show it more, and the reason is one plain reason: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering to set it going, and an old plant has gone past its intended finish often throws a few desperate male flowers on its own in a final attempt to make seed.

Not one of this means a sativa strain unstable as a matter of course; it means the room’s consistency count over a longer stretch. Light-tight room, steady temperatures and cutting when the plant is ready rather than a weeks later take away most of the problem. A listing that mentions a breeder tests parents for intersex traits is saying something more for a long-flowering line than on any other category.

Landrace

A population of plants adapted through centuries to a particular region by the local climate and climate alike, and not by modern selection. Thai, Colombian, Congolese and Oaxacan lines are the sativa cases. A landrace is variable, rather than a one plant: within a pack the heights, finishing times and aromas range far more than in any tent-bred line, and this spread is the point of growing one.

The trap is treating 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 rhythm tuned to an daylength most growers cannot offer. “Heirloom” on a listing generally refers to a landrace that has been reproduced somewhere over a number of generations, typically with a degree of selection for indoor conditions; it is closer to usable but nonetheless far from a hybrid. A shop offering “landrace” that does not give an collection region and a reproduction count is applying the word loosely, and the seeds should be priced with that in mind.

Stretch

The burst of vertical growth which comes after the switch to flowering. Indica-leaning plants gain half their height again; sativas commonly double, and some equatorial types go further. The stretch continues three to four weeks and will not be halted once it begins, merely redirected by training.

In practical terms, the stretch figure is a number to read before choosing when to flip. A sativa switched at sixty centimetres inside a standard tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. Growers moving over from indica stock nearly always flip far too late the first time, and the lesson is written on the ceiling of the tent.

Sativa-dominant

The catalogue term and not a botanical one. It generally indicates that the larger share of a hybrid’s lineage were classed as sativa according to the breeder who wrote the description, and sometimes signals no more than that the flowers are longer or the smell sharper than the that breeder’s indica-labelled releases.

The effect people connect with a word, lively instead of heavy, is driven more by terpene profile and by THC content than by ancestry, and plenty of “sativa-dominant” releases deliver a flat sleepy effect while plenty of indica-labelled lines do exactly the reverse. To a buyer the label is useful as a loose hint to growth habit, flowering time and stretch; for a guide to effect it is close to worthless without the aroma description.

Foxtailing

The habit of some flowers to push out fresh calyx growth on top of old ones, producing spired, irregular buds rather than round ones. In the majority of indica-leaning lines it is a stress response, typically from light too close or a room that is too high, and the advice is to correct the room.

In a good number of sativas, above all Southeast Asian and certain Haze lines, it is built in and is going to occur in a perfect room. A first-time sativa grower often wastes a month chasing a problem that was never not there, lowering lights and temperatures only slowing an already slow plant even more. The listing rarely says which type you should expect; the parentage usually tells you.

Flowering time (and what it is counted from)

The figure of weeks from the start of flowering and maturity, and the one most misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa grown with a ordinary vegetative period is a five-month plant. Seed companies also quote the shorter end of the spread, because the longer end sells fewer seed.

Sativa plants run anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks from the flip. The catalogue can be sorted by this number, which is a reasonable first pass if you have a room on a fixed timetable. A grower who adds four weeks to whatever the pack says is rarely disappointed.

Terpinolene (the “sativa smell”)

A terpene present in large proportion in many classic sativa strains and accounting for much of what growers describe as the “sativa” smell: fresh, woody, lemon and slightly sweet all at once. It is volatile, lost quickly through fast drying, and it degrades faster in the cure than the earthier terpenes which lead indica-leaning lines.

To a seed buyer the word does two things. When a listing lists terpinolene as the lead terpene, the strain probably has real Haze-era ancestry whatever the label claims. And when the grower wants that profile to survive by the jar, the drying has to be cool and cool; a fast drying room flattens a terpinolene sativa into something that tastes of very little and leaves no trace of what the pack described.

Equatorial (the twelve-hour problem)

Refers to lines out of latitudes where daylength barely varies through the year, and where the plant never develop a strong reaction to shortening days. These plants often flower reluctantly at a conventional twelve-hour light cycle, since twelve hours is, for them, a mild unremarkable day rather than a signal.

The practical response, handed around between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, especially during the last weeks. It costs some little yield and gains a earlier clearer finish. A listing that uses “equatorial” is telling you this in one word, and a grower who takes it as a note on geography has missed the point inside it.

Haze (the family, not the smell)

Originally a particular family of plants put together in coastal California from Colombian, Thai and South Indian parents, and then preserved and worked in the Netherlands. The Haze grows tall, fills out sparsely, takes for twelve sixteen weeks and smells of incense, pine and something metallic that no line quite has.

In its second sense “Haze” is any cross which carries some of that family, and today is a great many of the sativa-leaning market. A listing that reads “Haze” and gives no lineage could be eighty percent the classic family or one sixteenth of it, and the flowering time tracks the share, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.