Each trait that sells an indica seed has been put there by a range of mountains. The short frame, the seven-to-nine-week flowering, the hard resinous flowers, the broad dark leaf, the colour that comes in when the nights go cold: none of these is a breeder’s invention. They are the solutions a plant found over many thousands of years to a particular combination of pressures, in high altitude, in a brief dry summer, across the valleys of the Hindu Kush and the ranges beyond it. Breeders carried that solution down the mountain and refined it, but the logic of the plant is still the logic of the place. The lines referred to below come from the range at https://kushindicaseeds.com and its stock goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the account though applies for any genuine indica out of any seed catalogue. Knowing the terrain is the most reliable way to read the pack.
The Range
The Hindu Kush runs for about eight hundred kilometres from central Afghanistan into northern Pakistan, with the broader indica zone extending over into the western Himalaya on one side and the lowlands of the Afghan plateau on the other. The plant has been grown there over centuries, mainly for hashish, which means selected year after year by people who needed a plant above any other quality else: resin that could be sieved and pressed off a plant that had finished ahead of the autumn snow.
That is a separate history from the one that shaped the equatorial sativas, where daylength barely vary and the plant was free to flower for half a year. All that comes below is a consequence of four conditions about the place: it is high, it is arid, its growing season is short, and its nights go cold fast. The sequence that they are taken here hardly matter; a plant meets every one of them in the same season.
Height Is a Cost at Two Thousand Metres
A good deal of the old growing land lies from a thousand five hundred and three metres. At that height the air is thin, the UV load is heavy, the wind is constant and every centimetre of stem above the ground takes water the plant can ill afford. A tall plant on such ground loses more, snaps sooner and gets little for the height, because there is no canopy to clear.
The population which persisted is compact: short internodes, a strong thick main stem, side branches kept close, frequently broader than it is tall. In a tent that carries over straight: a true indica line stretches perhaps half its height over in flower whereas a sativa doubles, fits under a light with a modest short distance and rarely requires tying at all. Growers short on little height choose indica for this reason, and it is the mountain, not the breeder, that those growers are relying on.
Resin as Sunscreen and Sealant
The traditional zone is arid: low humidity, hard sun, rare rain through the late season. A plant there has two problems that its resin answers together. It needs to protect its flowering tissue from ultraviolet light, and it must keep moisture in the flower through weeks of desiccating wind. A heavy coat of trichomes do both: the heads absorb UV and the waxy layer slows water loss. Farmers for hashish on top of that drove the trait even harder, because resin was the crop.
Tight flower form goes with the same story: a closely packed bud gives up less water than an open one in dry air. Inside a tent these two traits arrive together, but just one of them is unconditionally an advantage. The resin is. The density turns into a risk the moment the air is humid: a bud shaped to hold water in a desert retains it just as well in a damp room, and bud rot moves through a dense indica cola more quickly than in any flower the equator has ever produced. The trait that moves the seed is the same trait that needs a dehumidifier in the last few weeks.
Seven Weeks Before the Snow
At two thousand metres the growing season is brief, and the autumn arrives early and decisively. A plant that took fourteen weeks to finish from the days started to draw in did not make seed on that terrain, so its genes dropped out of the population. What remained reacts sharply to the first shortening days and ripens in about seven to nine weeks from that cue.
In a tent that reflex is the one most frequently valued indica trait. Switch to twelve hours and the plant moves at once, grows for a couple of weeks and stacks flower for the rest of a short run. The fastest strains at Kush Indica Seeds come in at about 7 weeks from the flip, which permits five or six cycles a year from one space where a classic sativa gives perhaps two. This speed is no efficiency on the breeder’s side; it is the first snow encoded into the plant’s calendar.
The Fat Leaf
An indica fan leaf is wide, heavy and a deep green, with only a few broad fingers whereas a sativa leaf carries many narrow ones. Both pressures about the terrain favour the broad shape. High-altitude air and intense sun mean an high light dose per square centimetre, and a wide leaf gathers enough and does not need much surface; a big narrow-fingered leaf in that light simply burn. And steady wind tears thin foliage, while a thick, short-petioled leaf holds.
The dark colour is chlorophyll packed densely into a thick leaf, and part of the same answer. For the tent the leaves count in a single practical way: a dense indica canopy blocks light from everything beneath the top tier far more completely than a sativa’s, which means the lower flowers of an untrained indica come in airy and loose. Growers who strip a few few fan leaves at mid-flower are reversing, a little, what the mountain did for many thousands of years.
Cold Nights: Why Some Go Purple
Mountain nights drop below ten degrees weeks before the days do, and many indica populations react to that cold by making anthocyanin, the same pigment that colours autumn leaf purple. On the plant it appears as purple through the calyxes, leaves and occasionally the stem, and it offers nothing for the grower except look beautiful.
The point worth take from the colour is a matter of lineage, rather than decorative. The capacity to colour is carried from particular high-altitude stock, and a line that purples reliably with a cool last fortnight has that origin regardless of what the label says. Strains sold as “purple” that will only colour under heavy cold, or not at all, typically carry the colour in only the name and in the genes. Chilling the room during the last weeks draws the colour out where it is present and achieves nothing at all if it does not; it at the same time slows ripening, so it is a trade and not a costless trick.
Reading the Place Names
The great majority of indica pack names are the names of places or derive from them, and the places are far more useful than they look. “Afghani” generally refers to a population from the north of Afghanistan, and a typical short, resinous, fast-finishing form. “Hindu Kush” on a listing points to the high range proper and often to material collected on the Pakistani side. “Chitral” or “Mazar” name particular valleys with their own local forms, the former often purpling and the latter large and late for an indica. Kush Indica Seeds lists the collection region for each line where it is known, and that makes the name from a flavour to a datum the grower can use.
Most indica seed on sale are hybrid stock several generations removed from the valley, selected for uniformity and not to preserve the spread a true landrace carries; a buyer who wants the population itself needs to shop for packs labelled as unselected landrace stock and expect the surprises which arrive with the label.
Taking the Plant Off the Mountain
Each adaptation described above was an solution to the pressure which a tent does not present, and any solution without its pressure does either of two ways: it turns into a cost-free advantage or it turns into a hazard. The fast finish and the low frame are advantages, because no condition in a tent penalises a plant for them. The density and the broad canopy become hazards, because the dry air that justified them is absent and the still air of a sealed room has exactly the reverse effect.
That is why the indica cycle succeeds or goes wrong on one factor far more than any other: humidity in the final three weeks. A person that keeps it down gets the dense, frosted, early flower the mountain built; one who lets it rise gets rot in the best colas, which is exactly where the mountain was trying hardest to keep water in. Indoors, the mountain has to be reconstructed in the final two weeks: cool, dry, with moving air. All else about growing indica is easy precisely because the plant was bred to survive somewhere much harder.
What “Kush” Means Now
The word that gave the range its name has travelled further from it than almost any other in cannabis. “Kush” on a modern pack name may mean a true Hindu Kush reproduction, a West Coast hybrid with one Afghan ancestor, or a line named Kush because the seller liked the sound of it. A OG Kush line, which accounts for most of the appearances of the word today, is probably more sativa-influenced than many of the plants it borrows the name from, and its growth habit, flowering time and leaf shape say as much much.
A practical reading is the same one that applies across this page: look past the word and read the terrain. A listing that gives a low 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 gives a tall habit, eleven weeks and open buds is describing a plant from else wearing a mountain name. The seed remembers where it came by; the name often does not.
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