A Short Glossary for Sativa Seed Buyers

Sativa seeds come with more vocabulary attached than any other kind of cannabis seed, and a good deal of it says a certain thing to a botanist, something else to a breeder and a third to the grower trying to make a decision in front of the pack. A disappointing sativa grow nearly always goes back to a word that was read in the wrong sense: a flowering time read as a fixed number, a „sativa-dominant“ tag taken as a statement of character, a landrace chosen like it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand as the concrete examples, because it runs strongly to the long-flowering end of the category where the vocabulary matter most; the definitions themselves apply to any sativa seed from any shop. They are given in no special order, since none of them makes sense on its own without the others.

Terpinolene

A aromatic compound present in large amounts in many old sativa strains and accounting for most of what people mean as a „sativa“ smell: green, piney, lemon and faintly floral at once. It is volatile, driven off easily by hot drying, and it degrades faster in storage than the earthier terpenes which dominate indica-leaning stock.

To a seed buyer the word earns two things. When a listing names terpinolene among the leading terpene, the line probably has substantial old-sativa genetics whatever the label says. And where the grower are after that profile to still be there by the jar, the cure is going to be cool and slow; a warm drying room flattens a terpinolene sativa to a flower that smells of very little and nothing of what the pack described.

Stretch

The surge of upward growth which comes after the switch to flowering. Most tent-bred plants gain around half their height again; sativas routinely double, and some equatorial types go further. The stretch continues three to four weeks and cannot be halted after it has started, only redirected by training.

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

Equatorial (the twelve-hour problem)

Describes plants from regions in which daylength hardly changes across the year, which means that the plant does not develop a sharp reaction to changing days. These plants often start flowering slowly at a conventional twelve-hour schedule, since twelve hours is, for them, an unremarkable day and not a signal.

The practical response, handed around among sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, particularly in the last weeks. It loses a yield yield and buys an more decisive end. A listing which uses „equatorial“ is telling you this with one word, and a grower that reads it as mere origin misses the point hidden in it.

Landrace versus heirloom

A population of plants shaped over generations to one place by local growers and growers together, rather than by deliberate selection. Colombian, Thai, Malawian and Mexican stock are the classic sativa examples. A landrace is a spread, not a single plant: within a pack the flowering times, flowering times and aromas spread widely than in any tent-bred line, and that spread is the point of growing one.

The mistake is buying a landrace as a modern hybrid. It brings traits that made sense in an open field, such as a frame no tent can contain and a flowering clock tuned to an equatorial daylength the majority of growers cannot offer. „Heirloom“ on a listing generally means a landrace that has been grown out away from its origin over some generations, typically with a degree of selection towards tent life; it is nearer to manageable but still far from a hybrid. A shop listing „landrace“ without a collection point and a generation history is using the word as a flavour, and the pack should be judged accordingly.

Haze (the family, not the smell)

Originally a particular line of plants put together in coastal California from Colombian, Colombian and South Indian landraces, and later preserved and refined in the Netherlands. The Haze runs tall, branches sparsely, takes for twelve sixteen weeks and carries a scent of spice, pine and a note metallic that no line exactly reproduces.

In its second sense „Haze“ is whatever cross that contains a share of that family, which by now is a great many of the sativa-leaning catalogue. A listing that reads „Haze“ and gives no lineage may be mostly percent original classic family or one small fraction of it, and the grow time follows the share, not the name. The working question is never „is it a Haze“ but „how much, and via which parent“.

Latitude

The one figure that determines if a sativa will finish outdoors, and one no pack prints. Long-flowering plants need a autumn days to go on late enough to let the plant finish; in high latitudes the frost comes before that, and the grower cuts a unripe plant in late October or else loses it to mould in November. A closer south, within a northern hemisphere, the later the season stretches, and coastal or subtropical growers are able to ripen plants that northern gardens cannot.

The practical rule for a seed pack: an „outdoor“ line finishing date is stated for the breeder’s home latitude, normally a point in temperate Europe or the western United States, and every step further north of it pushes the date back towards the frost. A grower above about the fiftieth parallel who is after a true sativa in the garden needs to be looking for an autoflower or else a covered space, and not a better summer.

Hermaphroditism in long-flowering lines

The production of male flowers on a female plant, typically late in flower and often in response to stress. Almost every cannabis population carries some tendency for do; long-flowering lines express it more often, and the reason is one plain reason: sixteen weeks of flower is sixteen weeks of exposure for a timer leak, a heat spike or a missed watering that can set it going, and a plant that has gone past its natural finish often throws a few late male flowers on its own in a final attempt to set seed.

Not one of these makes a sativa strain unstable as a matter of nature; it makes the grower’s discipline count for a longer stretch. A sealed tents, steady conditions and cutting when the plant is done rather than two weeks later remove most of the risk. A listing that states the breeder screens parents for intersex tendency is saying something worth hearing on a sativa than on any other category.

Foxtailing

The tendency of certain flowers to push out new bud clusters on top of existing ones, giving spired, open buds rather than round ones. In most tent-bred strains it is a heat response, typically caused by light too close or temperatures too high, and the advice is to correct the room.

In a good number of sativas, above all Thai and some Haze lines, it is genetic and is going to occur in a perfect room. A new sativa grower often wastes weeks hunting a fault that is a problem, lowering lights and temperatures and slowing a slow flower even more. The listing rarely says which kind you should expect; the parentage usually tells you.

Sativa-dominant (the label)

The marketing term and not a botanical one. It generally indicates that the larger share of a hybrid’s lineage are classed as sativa according to the breeder who wrote the description, and sometimes means nothing more than a certain the buds are airier or the aroma brighter than the same breeder’s indica-labelled lines.

The experience people associate with the word, clear-headed rather than heavy, is driven far more by terpene profile and by THC balance than by ancestry, and a good number of „sativa-dominant“ releases deliver a flat sleepy result while a good number of indica-labelled stock do exactly the opposite. To a grower the label is useful as a loose guide to growth habit, flowering time and stretch; as a guide to how it feels it is close to useless unless accompanied by the aroma description.

Flowering time (and what it is counted from)

The figure of weeks between the onset of flowering and maturity, and 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 germination, so a „fourteen-week“ sativa grown with a ordinary vegetative period is a five-month plant. Breeders also give the optimistic end of the spread, because the longer end sells less seed.

Sativa plants take anywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks from the flip. The catalogue can be sorted by that number, which is a reasonable first step if you have a grower on a tight timetable. A grower who allows four weeks on top of the figure the pack states is seldom caught out.