Every trait that moves an indica seed has been bred there by a range of mountains. The squat stature, the fast flowering, the hard resinous buds, the wide blue-green leaf, the colour that appears when the nights turn cold: not one of these is an invention. They are the solutions a population arrived at over many thousands of years to a specific combination of problems, in great altitude, in a brief dry summer, across the valleys of the Hindu Kush and the mountains beyond it. Modern breeding carried that solution down the mountain and refined it, yet the shape of the plant is still the shape of the place. The examples pointed to in what follows are drawn from the range at https://kushindicaseeds.com and its stock goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the account itself holds to any true indica from any shop bank. Reading the terrain turns out to be the most reliable way to understand the pack.
The Range
The Hindu Kush stretches roughly eight hundred kilometres from central Afghanistan into northern Pakistan, with the broader indica homeland spilling over to the western Himalaya to one side and the deserts around the Central Asian interior on the other. The plant has been cultivated there for centuries, chiefly for hashish, and chosen year by generation by farmers who wanted a plant rather than any other quality else: something that could be sieved and pressed off a plant that had ripened before the first frost.
This is a different history from the one that produced the equatorial sativas, in which seasons barely change and the plant could grow for half a year. Everything that follows is the outcome of a handful of facts about the terrain: it is high, it is dry, its summer is short, and its nights go cold early. The order in which they are taken below does not matter; a plant experiences all of them at season.
Seven Weeks Before the Snow
Above two thousand metres the frost-free season is short, while the autumn comes quickly and comes hard. A plant that took fourteen weeks to ripen after the days started to draw in never set seed on such ground, so its genes dropped out of the population. What remained reacts sharply to shortening days and finishes in about seven to nine weeks from that cue.
Indoors that response is the one most cited indica quality. Switch to twelve hours and the plant commits immediately, stretches over a couple of weeks and fills flower over the remainder of a brief cycle. The quickest strains at Kush Indica Seeds come in at around 7 weeks after the switch, and that permits as many as five or six harvests a year from one space where a long sativa allows two. That difference is no cleverness on the breeder’s side; it is the first snow encoded into the plant’s calendar.
Height Is a Cost at Two Thousand Metres
Much of the traditional growing zone sits between a thousand five hundred and three thousand metres. At at that height the air is thin, the UV exposure is intense, the wind is relentless and every centimetre of stem over the soil takes water the plant cannot afford. A tall plant in such terrain loses more, snaps more and gains little for its height, since there is no canopy to outgrow.
The population which persisted is compact: tight internodes, a single dense main stem, side branches held close, frequently broader than it is tall. In a tent that translates straight: a true indica seed gains maybe half its height over in flower whereas a sativa doubles, fits beneath a light at a modest distance and seldom needs training down. Growers with little height buy indica for precisely this trait, and it is the mountain, not the breeder, that they are thanking.
The Fat Leaf
An indica fan leaf is broad, heavy and a deep green, and only a few broad lobes whereas a sativa fan leaf carries many thin ones. Both pressures about the terrain favour the broad form. Thin air and intense sun put a heavy light dose on each square centimetre, so a broad leaf gathers plenty and does not need much area; a big narrow-fingered leaf in that light just scorch. And steady wind shreds thin leaves, whereas a thick, short-petioled leaf holds.
The deep colour is pigment loaded densely into a heavy leaf, which is one part of the same adaptation. To the grower these leaves matter in one practical respect: a broad-leafed indica canopy shades all growth beneath the top layer much more completely than a sativa’s, so the lower buds of an untrained indica finish in airy and loose. Growers who strip a few large leaves in mid-flower are reversing, carefully, something the range did for thousands of years.
Cold Nights: Why Some Go Purple
High-valley nights fall below ten degrees long before the afternoons follow, and many indica lines react to the chill by producing anthocyanin, the same compound that colours a maple leaf red. In the plant it appears as purple through the calyxes, fan leaves and occasionally the stem, which it does nothing for the grower except looking striking.
The thing worth take from the colour is a matter of lineage, not cosmetic. The tendency to turn is carried from particular cold-valley populations, and a line that purples every time with a cold last two weeks carries the ancestry whatever the name claims. Lines marketed as “purple” that only turn under extreme cold, or never at all, usually carry a word in the name and nothing of it in the plant. Chilling the room in the last weeks draws the colour out where it is present and does nothing at all where it is absent; it at the same time slows ripening, so it is a trade rather than a free effect.
Dry Air: Why the Buds Are Dense and Resinous
The old zone is arid: low humidity, hard sun, little rainfall through the late season. A plant in such a place has two problems which resin solves together. It needs to shield its flowering tissue from UV exposure, and it must hold moisture inside the flower through a long stretch of dry wind. Trichomes do both: their heads absorb UV and the waxy layer reduces water loss. Farmers for hashish on top of that drove the trait even harder, since resin was the product.
Dense bud structure goes to the same story: a closely clustered bud gives up less water than an open one in arid air. In a tent these same traits come together, and only one of them is always an advantage. The resin is. The density turns into a risk the moment the air is humid: a bud shaped to retain water in a desert retains it just as well in a wet tent, and bud rot moves in a hard 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 final three weeks.
Afghani, Mazar, Chitral, Hindu Kush
The great majority of indica pack labels carry the names of places or derive from one, and the names are far more informative than they look. “Afghani” usually means a population out of the Mazar-i-Sharif of Afghanistan, which is the typical short, hash-plant, fast-finishing form. “Hindu Kush” on a name points to the central mountains proper and often to stock taken on the eastern side. “Chitral” or “Mazar” point to particular valleys with their own recognisable forms, the first often purpling and the latter large and slower for an indica. Kush Indica Seeds gives the origin region on every line whenever it is known, which makes the name from a brand into a fact the grower can plan around.
Most indica seed on sale are worked stock several generations removed from the valley, selected for uniformity and not for the spread of a true landrace holds; a buyer who wants the spread has to look for lines labelled as pure reproductions and accept the surprises which come with them.
Taking the Plant Off the Mountain
Every trait described above was an answer to a condition which a tent no longer impose, and a solution that has lost its problem does one of two ways: it becomes a cost-free bonus or it becomes a hazard. The fast finish and the short stature become advantages, because no condition in a tent penalises a plant for them. The density and the heavy canopy become costs, because the dry wind that made sense of them is absent and the still air of a closed room has precisely the reverse influence.
This is why an indica grow goes well or fails on a single factor far more than on any other: humidity in the final three weeks. A person that holds it down gets the dense, resinous, early flower the mountain built; one who lets it rise is punished with mould in the best colas, which is exactly where the plant was trying the plant to hold water in. Indoors, the mountain has to be rebuilt in the last two weeks: cool, dry, with moving air. Everything else about growing indica is easy precisely since the population was selected to survive somewhere hard.
The Drift of a Word
The word that lent the mountains its name has moved a long way from it than almost any term in cannabis. “Kush” in a modern seed listing can refer to a unselected Hindu Kush landrace, a Californian Coast hybrid carrying one Kush ancestor, or a strain called Kush since the breeder thought the sound would sell. The famous OG Kush family, and this accounts for most of the appearances of the word in the market, is most likely more sativa-influenced than many of the stock it borrows the name from, and its stretch, finishing time and leaf say as much.
A practical rule is the one which applies across this page: look past the word and go back to the terrain. A listing which states an modest stretch, a finishing time under nine weeks, a hard bud and a broad leaf is selling a mountain plant whatever it is named; one that states a tall habit, eleven weeks and airy buds is selling something somewhere else with a mountain name. The seed carries the place it came by; the label often does not.