Every quality that moves an indica seed was put there by a mountain. The squat frame, the seven-to-nine-week flowering, the hard resinous flowers, the broad blue-green leaf, the purple that comes in as the nights go cold: not one of them is a breeder’s invention. They are the solutions a population arrived at through many thousands of years to a specific set of pressures, in great altitude, in a short dry season, on the valleys of the Hindu Kush and the ranges around it. Breeders carried that solution down the mountain and refined it, but the shape of the plant is to this day the logic of the terrain. The lines referred to in what follows are drawn from the range at https://kushindicaseeds.com whose stock traces to Afghanistan, northern Pakistan and the Indian Himalaya; the account though holds to any genuine indica from any shop catalogue. Reading the terrain is the most reliable way to understand the pack.
Where the Population Formed
The Hindu Kush runs roughly eight hundred kilometres out of the middle of Afghanistan towards northern Pakistan, with the wider indica homeland spilling across to the Indian Himalaya on one side and the deserts around the Afghan plateau on the other. Cannabis has been grown there over a very long time, mainly for hashish, and chosen year by year by farmers who needed resin above any other quality else: resin that could be rubbed or pressed off a plant that had ripened before the autumn snow.
That is a different history from the one that produced the equatorial sativas, where daylength hardly change and the plant could flower for most of a year. Everything that comes below is a consequence of four conditions about the place: it is high, it is arid, the growing season is short, and its nights go cold fast. The sequence in which they are taken below hardly matters; a plant meets every one of them in the same season.
The Fat Leaf
An indica fan leaf is wide, thick and dark, with few broad fingers where a sativa fan leaf has more thin ones. Two things in the terrain select for the broad form. Thin air and intense sun mean a heavy photon dose on each square centimetre, and a wide leaf catches enough and does not need a lot of surface; a large narrow-fingered leaf would just scorch. And constant wind shreds thin leaves, whereas a stout, short-petioled leaf holds.
The dark colour is pigment packed thickly into a thick leaf, and one part of the same answer. For the tent these features matter in a single practical respect: a dense indica canopy blocks light from everything below the top tier much more thoroughly than a sativa’s, which means the lower flowers of an untrained indica come in airy and loose. People that strip a large leaves in week three are reversing, carefully, what the range did over many thousands of years.
Built for a Desert Autumn
The traditional zone is arid: low humidity, intense sun, rare rainfall in the late season. A plant there has two problems which resin solves at once. It must protect its flowering tissue from ultraviolet exposure, and it must hold moisture in the flower through a long stretch of desiccating wind. Trichomes do both: their resin heads absorb UV and their waxy layer reduces water loss. Selection for hashish on top of that pushed the trait even harder, since resin was the product.
Tight bud structure goes with the same story: a tightly clustered bud loses less water than an airy one in dry air. Inside a tent those two traits come together, but only one of them is always welcome. The resin is. The density turns into a risk the instant the room is damp: a bud built to hold water in a desert retains it equally well in a wet tent, and botrytis spreads in a dense indica cola more quickly than in any flower an equator ever produced. The quality that moves the seed is the one that needs a drier room during the last three weeks.
Height Is a Cost at Two Thousand Metres
A good deal of the traditional growing zone lies from fifteen hundred and three thousand metres. Up that height the air is thin, the ultraviolet exposure is heavy, the wind is relentless and every centimetre of stem over the soil takes water the plant can ill spare. A tall plant in that terrain dries out more, snaps sooner and gains little for the height, because there is no canopy it needs to clear.
The plant which persisted is compact: tight internodes, a single dense main stem, side branches kept close, frequently broader than it is tall. In a tent that carries over straight: a true indica seed stretches perhaps half its height over through flower where a sativa doubles, sits beneath a lamp with a short gap and seldom needs training down. Anyone with little height buy indica for this reason, and it is the mountain, not the breeder, that they are relying on.
The Colour of a Cold Valley
Mountain nights drop under ten degrees long before the afternoons follow, and many indica lines react to the cold by making anthocyanin, the same compound that turns autumn leaf red. On the plant it shows as purple through the bracts, fan leaves and sometimes the stem, which it does little for the smoker except looking beautiful.
A point worth taking from it is a matter of lineage, not decorative. The capacity to colour is inherited out of specific cold-valley populations, and a strain that colours reliably in a cold final two weeks carries that ancestry regardless of what the label claims. Strains marketed as “purple” that only turn with extreme cold, or never really, typically have the colour in the name and nothing of it not in the plant. Chilling the room during the last weeks brings the colour forward where it is present and does nothing at all if it does not; it at the same time slows ripening, so it is a bargain rather than a free effect.
The Short Season: Why It Flowers Fast
At two thousand metres the growing window is short, and the autumn comes early and comes decisively. A plant that needed fourteen weeks to finish from the days started to shorten did not make seed in such ground, so its genes left the population. The plant that stayed responds sharply to shortening days and ripens in roughly seven to nine weeks after that signal.
Indoors that response is the single most frequently valued indica quality. Switch to twelve hours and the plant moves at once, stretches for a fortnight and stacks flower over the rest of a brief run. The quickest strains at Kush Indica Seeds come in in about 7 weeks after the switch, and that allows as many as five or six harvests a year out of one space whereas a long sativa allows perhaps two. This difference is not efficiency on the breeder’s part; it is the snowline written into the plant’s clock.
Afghani, Mazar, Chitral, Hindu Kush
Most indica seed labels carry place places or descend from one, and the names are more useful than they look. “Afghani” usually refers to stock from the north of Afghanistan, which is the classic squat, hash-plant, fast-finishing type. “Hindu Kush” on a name refers to the high mountains proper and frequently to material collected on the eastern side. “Chitral” or “Mazar” point to specific valleys with their own local forms, the former often colouring and the latter large and slower for an indica. Kush Indica Seeds gives the origin region on each line whenever it is documented, which turns the name a flavour to a datum the grower can plan around.
Almost all indica seed on sale are worked stock many generations removed from the valley, selected for uniformity rather than for the spread of a true landrace holds; a buyer that wants the population itself needs to shop for lines labelled as pure reproductions and accept the variation which come with the label.
Taking the Plant Off the Mountain
Each adaptation described above was an solution to the pressure that a tent does not present, and a solution without its pressure does one of two ways: it becomes a free advantage or it becomes a cost. The speed and the low stature are bonuses, because no condition in a room penalises a plant for them. The density and the broad canopy become costs, since the arid air that justified them is absent and the damp atmosphere of a closed room does exactly the opposite effect.
That is why an indica cycle goes well or fails in one variable more than on any other: humidity in the final three weeks. A person who holds it low gets the hard, resinous, fast flower the mountain bred; one that does not gets rot inside the best colas, where exactly where the mountain had trying the plant to hold water in. In a room, the terrain has to be reconstructed for the final fortnight: cool, dry, with moving air. All else about growing indica is easy exactly since the population was selected for somewhere hard.
The Drift of a Word
The word that lent the range its name has since travelled a long way from it than almost any other in cannabis. “Kush” on a current pack listing can mean an true Hindu Kush landrace, a West Coast hybrid carrying one Afghan ancestor, or a line named Kush since the seller liked the sound of it. The famous OG Kush line, which accounts for most of the use of the word in the market, is most likely more sativa-influenced than many of the stock it borrows the word from, while its growth habit, flowering time and leaf shape show as much.
The usable rule is the one which holds throughout this article: ignore the word and go back to the terrain. A listing which states a modest stretch, a finishing time below nine weeks, a hard flower and a wide leaf is describing a mountain plant regardless of what it is called; one that states a tall frame, eleven weeks and airy flowers is describing a plant from somewhere else with a mountain name. The seed remembers where it was shaped from; the label frequently does not.