Sativa seeds arrive with more vocabulary around them than any other kind of cannabis seed, and most of it means one thing to a botanist, another to a breeder and a third to the grower trying to make a decision in front of the listing. The failed sativa grow nearly always traces back to a word that was understood in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” tag read as a description of effect, a landrace chosen as if it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for the concrete examples, because it leans strongly towards the long-flowering end of the spectrum where the words carry the most weight most; the definitions themselves apply to any sativa seed from any seller. They are in no particular order, since not one of them makes sense without the rest.
Equatorial (the twelve-hour problem)
Describes lines out of latitudes where daylength barely changes through the year, which means where the plant does not evolved a strong reaction to changing days. Such lines frequently start flowering reluctantly at a standard twelve-hour schedule, since twelve hours is, for them, a mild unremarkable day and not a signal.
The working response, passed down between sativa growers over decades, is to cut the light more: eleven hours, occasionally ten, particularly during the last weeks. It costs some yield yield and buys a earlier clearer end. A listing which uses “equatorial” is telling you this with one word, and a grower that takes it as a note on origin misses the instruction hidden in it.
Terpinolene (the “sativa smell”)
A terpene found in high amounts in many classic sativa strains and responsible for much of what people mean as the “sativa” smell: fresh, woody, lemon and slightly floral all at once. It is fragile, driven off easily through hot drying, and terpinolene fades more quickly during the cure than the heavier terpenes that dominate indica-leaning stock.
For a seed buyer the name earns two jobs. When a listing names terpinolene among the lead terpene, the line most likely has substantial old-sativa genetics whatever the label claims. And where the you are after that smell to still be there to the jar, the drying is going to be slow and slow; a warm drying room turns a terpinolene sativa to something that tastes of hay and no trace of what the pack described.
Latitude
The single number that determines whether a sativa can ripen outdoors, and a number no pack prints. Long-flowering plants need the run of shortening days to continue late enough to let the plant finish; in northern latitudes the frost arrives first, and the grower harvests a unripe plant in the end of October or else loses it to mould in November. The further south, in a northern hemisphere, the longer the window runs, and coastal and subtropical gardens can ripen lines that temperate growers never will.
The usable reading of a seed listing: an “outdoor” line harvest date is given for the breeder’s own latitude, normally a point within temperate Europe or the west coast of the United States, and every degree further north of that pushes the finish later towards the weather. A grower north of about the fiftieth parallel who is after a long-flowering sativa outdoors needs to be looking for an autoflower or a greenhouse, and not a better summer.
Landrace versus heirloom
A population of plants shaped through generations to one place by local climate and growers alike, rather than by deliberate selection. Colombian, Thai, Congolese and Oaxacan lines are the classic sativa cases. A landrace is a spread, not a one plant: within a pack the flowering times, finishing times and smells spread widely than in any tent-bred hybrid, and this spread is the point of keeping one.
The mistake is buying a landrace as a modern product. It brings traits that make sense in an open field, including a frame no tent can hold and a flowering clock set to an equatorial daylength most growers cannot provide. “Heirloom” on a listing usually means a landrace that has been grown out somewhere for some generations, often with a degree of selection for indoor life; it is nearer to manageable but nonetheless far from uniform. A seller offering “landrace” without a collection point and a reproduction count is applying the word loosely, and the seeds should be judged with that in mind.
Foxtailing (and when it is not a fault)
The habit of certain flowers to grow new calyx clusters on top of old ones, producing towered, irregular buds rather than dense ones. In most tent-bred strains it is a heat response, typically caused by light too close or a room that is too high, and the advice is to fix the room.
In many sativas, above all Southeast Asian and certain Haze lines, it is built in and will occur under a flawless room. A first-time sativa grower frequently spends weeks chasing a fault that is a problem, dropping lights and heat only delaying a slow flower further. The breeder seldom says which type you should expect; the parentage usually does.
Sativa-dominant
The catalogue term rather than a botanical one. The phrase usually indicates that the larger share of a hybrid’s lineage were classed as sativa by the breeder who drafted the description, which sometimes means nothing more than that the buds are airier or the aroma brighter than the that breeder’s indica-labelled releases.
The experience people associate with a word, lively instead of heavy, is driven more by terpene profile and the THC content than it is by the sativa fraction, and a good number of “sativa-dominant” hybrids produce a heavy sleepy effect and plenty of the opposite stock do exactly the reverse. To a grower the percentage is useful for a rough guide to growth habit, flowering time and stretch; as a guide to how it feels it is next to worthless unless accompanied by the terpene notes.
Haze
Originally a particular line of plants put together in coastal California from Colombian, Thai and South Indian landraces, and later kept and worked in the Netherlands. The Haze grows tall, fills out sparsely, flowers for twelve sixteen weeks and carries a scent of spice, citrus and something metallic that no other line quite reproduces.
In its second sense “Haze” is whatever cross which carries some of that family, and today is most of the sativa-leaning market. A listing that says “Haze” without parents may be eighty percent the classic family or one small fraction of it, and the flowering time follows the share, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Intersex tendency
The appearance of male flowers on a female plant, usually towards the end in flower and often under stress. Every cannabis population carries some capacity to it; sativa lines express it more often, and the reason is one plain one: fourteen weeks of flower is fourteen weeks of opportunity for a light leak, a heat spike or a late watering that can trigger it off, and a old that has already gone past its natural finish often throws a few desperate pollen sacs on its own as a final effort to set seed.
None of these means a sativa strain weak by nature; it means the grower’s consistency count for a longer stretch. A sealed tents, steady conditions and cutting when the plant is done rather than a weeks later remove the greater part of the problem. A listing that mentions a breeder tests parents for hermaphrodite tendency is saying something worth hearing for a long-flowering line than for any else.
Stretch
The surge of upward growth which follows the switch to flowering. Most tent-bred plants gain half again; sativas commonly double, and a few equatorial types triple. The stretch continues two to five weeks and cannot be stopped once it has started, only bent sideways by training.
In tent terms, the stretch figure is a number worth read before deciding when to flip. A sativa switched at sixty centimetres centimetres in a two-metre tent is at the lamp by week four of flower; one switched at thirty centimetres has room. Growers coming from indica strains almost always switch far too late the first time, and the lesson is written on the ceiling of the tent.