Tracing Indica Traits Back to the Terrain
Each trait that moves an indica seed has been bred there by a mountain. The squat stature, the seven-to-nine-week flowering, the hard frosted buds, the broad dark leaf, the colour that appears when the nights go cold: not one of them is an invention. They are the answers a population found over many thousands of years to a particular set of pressures, at high altitude, in a short dry summer, on the valleys of the Hindu Kush and the mountains beyond it. Breeders took that solution off the mountain and polished it, but the logic of the plant is still the shape of the place. The lines referred to below come from the range at https://kushindicaseeds.com and its catalogue goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the account though holds for any true indica from any shop catalogue. Knowing the terrain turns out to be the quickest way to understand the pack.
Where the Population Formed
The Hindu Kush runs roughly eight hundred kilometres out of central Afghanistan into northern Pakistan, with the wider indica zone extending over into the western Himalaya on one side and the lowlands around the Afghan interior on the other. The plant has been grown there over centuries, mainly for hashish, which means selected generation after year by people who needed a plant rather than any other quality else: something that could be rubbed and sieved from a plant that had finished ahead of the first frost.
That is a different selection to the one that shaped the equatorial sativas, where seasons barely change and the plant could grow for most of a year. Everything that comes below is the outcome of four facts about the terrain: it is high, it is dry, its growing season is short, and its nights go cold fast. The sequence in which they are discussed here does not matter; a plant meets all of them at once.
Finishing Before the Frost
At two thousand metres the growing season is brief, while the autumn comes quickly and decisively. A plant which took fourteen weeks to ripen from the days began to draw in never set seed in that terrain, so the genes left the population. The plant that stayed responds sharply to shortening days and finishes in roughly seven to nine weeks from the cue.
In a tent that response is the single most cited indica quality. Flip to twelve hours and the plant moves at once, stretches for a fortnight and fills flower over the rest of a short cycle. The quickest strains at Kush Indica Seeds come in at about 7 weeks from the switch, which permits five or six cycles a year out of one room whereas a classic sativa gives two. This difference is no cleverness on the breeder’s part; it is the first snow written into the plant’s own clock.
Leaves for a Thin Atmosphere
An indica fan leaf is wide, heavy and dark, with few wide lobes whereas a sativa fan leaf has many narrow ones. Both things about the climate favour that form. High-altitude air and intense sun mean a heavy light load on each square centimetre, and a wide leaf catches plenty without a lot of surface; a big narrow-fingered leaf would just scorch. And steady wind shreds thin foliage, while a stout, short-petioled leaf holds.
The dark colour is chlorophyll packed thickly into a heavy leaf, and one part of the same answer. To the grower the leaves matter in a single everyday respect: a dense indica canopy blocks light from all growth beneath the top layer far more thoroughly than a sativa’s, which means the lower buds on an untrained indica come in small and weak. Growers who strip a fan leaves in mid-flower are undoing, a little, what the mountain did over many thousands of years.
Height Is a Cost at Two Thousand Metres
A good deal of the old growing zone lies from fifteen hundred and three metres. Up at that height the air is thin, the ultraviolet load is intense, the wind is relentless and every centimetre of stem above the ground takes resources the plant can ill spare. A tall plant in such ground dries out more, breaks sooner and gains little for its extra height, because there is no canopy it needs to clear.
The plant which persisted is low: tight internodes, a single dense central stem, branches kept close, often broader than it is tall. In a tent that translates straight: a pure indica line gains perhaps half its height again in flower whereas a sativa doubles, fits under a light with a modest gap and rarely needs training down. Growers with limited headroom choose indica for this trait, and it is the mountain, not the breeder, that those growers are thanking.
Built for a Desert Autumn
The traditional homeland is arid: low humidity, hard sun, little rain through the late summer. A plant in such a place has two problems which resin solves at once. It must protect its reproductive parts from ultraviolet light, and it needs to hold moisture in the bud through a long stretch of dry wind. A heavy coat of trichomes does both: the resin heads block the ultraviolet and their coating reduces moisture loss. Farmers for hashish on top of that pushed the trait even harder, because resin was always the product.
Dense flower form goes to the same story: a tightly packed bud gives up less water than an open one in dry air. Inside a tent those same traits come together, and just one of them is unconditionally an advantage. The resin is. The density turns into a risk the instant the air is humid: a bud shaped to hold water in a desert holds it just well in a damp room, and bud rot moves in a dense indica cola faster than in anything an equator has ever produced. The trait that moves the seed is the same trait that calls for a drier room in the last three weeks.
The Colour of a Cold Valley
High-valley nights fall under ten degrees long before the days do, and a good number of indica lines react to the chill by making anthocyanin, the same compound that turns autumn leaf purple. On the plant it shows as purple in the bracts, leaves and occasionally the stem, and it does nothing for the smoker except look striking.
The point to taking from it is genetic, rather than cosmetic. The capacity to turn is inherited from specific cold-valley stock, and a line that purples reliably with a cool final two weeks carries the ancestry regardless of what the label claims. Lines marketed as “purple” that will only turn under heavy cold, or not really, usually carry the word in the name and not in the plant. Chilling the room during the final weeks draws the colour forward where it is present and achieves nothing at all where it is absent; it at the same time slows ripening, so it is a trade rather than a costless trick.
The Valley Names on the Pack
Most indica seed names are place places or descend from them, and the names are more useful than most buyers realise. “Afghani” generally refers to a population from the Mazar-i-Sharif of Afghanistan, and the typical squat, hash-plant, early-finishing form. “Hindu Kush” in a listing refers to the high range itself and often to material taken on the eastern side. “Chitral” and “Mazar” point to particular valleys that have their own local forms, the first frequently colouring and the second large and slower for an indica. Kush Indica Seeds lists the collection area for each pack whenever it is known, which makes the name from a brand to a datum the grower can use.
Most indica seed on sale is worked material many generations from the valley, selected for uniformity rather than for the variation of a true landrace holds; a buyer who wants the population itself needs to shop for packs labelled as unselected landrace stock and expect the surprises which come with the label.
Where the Adaptations Turn Against You
Each adaptation described above was a solution to a pressure which a tent no longer impose, and any solution without its problem behaves either of two things: it becomes a cost-free bonus or it turns into a cost. The fast finish and the low stature are advantages, because nothing in a room punishes them. The density and the broad leaf are costs, because the arid wind that justified them is absent and the damp air of a sealed room has precisely the opposite influence.
That is why the indica grow goes well or goes wrong in one variable more than on any other: humidity in the last three weeks. A grower that holds it down gets the dense, resinous, early flower the mountain bred; one that does not is punished with rot in the thickest colas, which is exactly where the plant was arranged the plant to hold moisture in. Indoors, the terrain has to be reconstructed for the last two weeks: cool, dry, moving air. Everything else about running indica is easy exactly because the plant was bred for somewhere hard.
The Drift of a Word
The word that lent the range its name has moved a long way from it than almost any other in cannabis. “Kush” on a current pack name can mean a unselected Hindu Kush landrace, a West Coast hybrid with one Afghan grandparent, or a strain called Kush because the breeder liked the sound would sell. The famous OG Kush line, and this accounts for most of the appearances of the word in the market, is most likely more sativa-leaning than a good deal of the stock it borrows the name from, and its stretch, flowering time and leaf shape say as much.
A usable reading is the one that applies throughout this article: ignore the word and go back to the terrain. A listing which gives a modest stretch, a flowering time under nine weeks, a dense bud and a broad leaf is selling a mountain plant whatever it is named; one that states a tall frame, twelve weeks and open flowers is describing a plant from somewhere else wearing a borrowed name. The seed carries the place it was shaped from; the label frequently does not.