Each trait that sells an indica seed has been put there by a range of mountains. The short frame, the fast flowering, the dense resinous flowers, the broad dark leaf, the purple that comes in when the nights turn cold: not one of these is a breeder’s design. They are the answers a population arrived at over many thousands of years to a specific set of problems, at high altitude, in a short dry, cold summer, on the slopes of the Hindu Kush and the mountains beyond it. Modern breeding carried that answer down the mountain and polished it, but the logic of the plant is to this day the shape of the terrain. The lines referred to below are drawn from the range at https://kushindicaseeds.com whose catalogue goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the account itself applies to any true indica out of any shop bank. Reading the terrain is the most reliable way to understand the pack.
The Range
The Hindu Kush stretches roughly eight hundred kilometres out of the middle of Afghanistan towards northern Pakistan, and the broader indica zone extending over into the Indian Himalaya to one side and the deserts of the Central Asian plateau on the other. Cannabis has been cultivated there over centuries, chiefly for hashish, and chosen year after year by farmers who needed resin above any other quality else: resin that could be rubbed or pressed off a plant that would have finished before the autumn snow.
This is a different history to the one that produced the tropical sativas, in which seasons hardly change and the plant could grow for half a year. All that follows is the consequence of four conditions about the terrain: it is high, it is dry, the growing season is short, and the nights go cold early. The sequence in which they are taken below hardly matter; a plant meets every one of them in the same once.
Wind and Sun: Why the Leaf Is Broad and Dark
The indica leaf is wide, heavy and dark, and only a few wide lobes whereas a sativa leaf carries more thin ones. Both pressures about the terrain select for that shape. High-altitude air and intense sun put a heavy light dose on each square centimetre, so a wide leaf catches plenty without a lot of surface; a big narrow-fingered leaf in that light just scorch. And steady wind shreds thin leaves, while a thick, short-stalked leaf holds.
The dark colour is pigment loaded densely into a thick leaf, and part of the same adaptation. To the grower the leaves matter in a single practical respect: a dense indica canopy blocks light from all growth below the top layer far more completely than a sativa’s, which means lower flowers on an unmanaged indica finish in small and loose. People who remove a large leaves in mid-flower are undoing, a little, what the range put there over many thousands of years.
Cold Nights: Why Some Go Purple
Mountain nights fall below ten degrees long before the days do, and many indica lines react to that chill by producing anthocyanin, the same pigment that turns a maple leaves red. On the plant it appears as purple through the calyxes, fan leaves and sometimes the stem, and it offers nothing for the smoker beyond looking beautiful.
A thing to taking from the colour is genetic, rather than decorative. The tendency to turn is inherited from particular cold-valley stock, and a line that purples every time in a cool last two weeks carries the origin regardless of what the name claims. Lines marketed as “purple” that will only turn under extreme cold, or not really, usually have the colour in only the name and nothing of it not in the genes. Chilling the room in the final weeks brings the colour out where it exists and does nothing at all where it is absent; it at the same time slows ripening, so it is a bargain and not a free effect.
Resin as Sunscreen and Sealant
The old homeland is dry: low humidity, intense sun, rare rain through the late summer. A plant there has two pressures that resin answers at once. It must protect its flowering parts from ultraviolet exposure, and it must hold water inside the flower over a long stretch of desiccating wind. Trichomes do both: their resin heads absorb the ultraviolet and the coating slows moisture loss. Selection for hashish on top of that pushed the resin further, because resin was the product.
Tight bud form belongs to the same story: a tightly clustered bud loses less water than an open one in dry air. Inside a tent those two qualities arrive together, and only one of them is always an advantage. The resin is. The density turns into a liability the moment the air is humid: a bud shaped to retain water in a desert holds it equally well in a damp tent, and botrytis moves through a dense indica cola faster than in any flower the equator has ever made. The quality that moves the seed is the one that calls for a dehumidifier during the last three weeks.
Finishing Before the Frost
Above two thousand metres the growing window is short, and the autumn arrives quickly and hard. A plant that took fourteen weeks to ripen from the days started to shorten never make seed in that terrain, and the genes left the population. The plant that stayed responds fast to shortening days and finishes in about seven to nine weeks from the cue.
Indoors that response is the single most valued indica quality. Switch to twelve hours and the plant commits immediately, stretches for a fortnight and fills flower over the rest of a brief run. The fastest strains at Kush Indica Seeds finish at about 7 weeks from the flip, and that allows five or six cycles a year out of one space whereas a long sativa gives perhaps two. That speed is not cleverness on the breeder’s side; it is the snowline encoded into the plant’s own calendar.
Altitude: Why the Plant Is Short
A good deal of the traditional growing zone sits between fifteen hundred and three thousand metres. Up at that height the air is thin, the ultraviolet exposure is intense, the wind is relentless and every centimetre of stem over the soil costs resources the plant cannot afford. A tall plant in such ground dries out faster, breaks more and gets nothing for the height, since there is no canopy to clear.
The plant which survived is low: tight internodes, a single dense central stem, branches kept close, frequently wider than it is tall. In a tent that translates directly: a pure indica line gains perhaps half its height over through flower where a sativa doubles, sits beneath a light at a modest distance and rarely needs tying down. Anyone with little height choose indica for precisely this reason, and it is the mountain, not the breeder, that those growers are relying on.
Afghani, Mazar, Chitral, Hindu Kush
The great majority of indica pack names carry place places or descend from one, and the places are far more informative than most buyers realise. “Afghani” usually means a population from the north of Afghanistan, which is the typical squat, hash-plant, early-finishing type. “Hindu Kush” in a name points to the central mountains itself and often to stock collected on the eastern side. “Chitral” or “Mazar” name specific valleys that have their own recognisable forms, the former frequently purpling and the latter heavy and slower for an indica. Kush Indica Seeds gives the collection area on each pack whenever it is documented, which makes the name from from a flavour to a fact the grower can use.
Almost all indica seed on sale is worked material several generations removed from the valley, bred for consistency rather than to preserve the variation of a true landrace carries; a buyer that is after the population itself needs to shop for packs described as pure landrace stock and accept the surprises which come with the label.
Where the Adaptations Turn Against You
Each trait described above was an solution to the condition that a tent does not present, and any solution without its pressure does one of two ways: it turns into a free bonus or it becomes a cost. The speed and the low stature become bonuses, since nothing in a room punishes a plant for them. The density and the broad leaf are costs, since the dry air that made sense of them is gone and the still atmosphere of a sealed room has exactly the reverse effect.
That is why an indica cycle goes well or goes wrong on one variable far more than any other: humidity during the final few weeks. A person that keeps it low gets the dense, resinous, early flower the mountain bred; one who does not is punished with rot in the best colas, which is exactly where the mountain had trying the plant to hold moisture in. Indoors, the terrain is to be rebuilt in the last fortnight: cool, dry, moving air. All else about running indica is forgiving exactly because the plant was bred to survive somewhere hard.
The Drift of a Word
The word that lent the range its name has moved a long way from it than any other in cannabis. “Kush” on a current pack listing can refer to a true Hindu Kush landrace, a Californian Coast hybrid carrying one Kush grandparent, or a line named Kush because the seller liked the sound of it. The famous OG Kush line, which dominates the use of the word today, is most likely as much sativa-leaning than a good deal of the plants it takes the name from, while its growth habit, finishing time and leaf show as much.
A practical rule is the one that holds across this page: look past the word and go back to the terrain. A listing which states an low stretch, a finishing time below nine weeks, a hard flower and a broad leaf is selling a mountain plant regardless of what it is named; one that gives a lanky habit, eleven weeks and open flowers is describing a plant from somewhere else with a mountain name. The seed carries the place it came from; the label often has forgotten.