Every quality that sells an indica seed was bred there by a range of mountains. The short stature, the fast flowering, the hard frosted flowers, the broad dark leaf, the purple that comes in when the nights turn cold: none of these is a breeder’s design. They are the answers a population arrived at over thousands of years to a particular combination of pressures, at high altitude, in a short dry summer, across the valleys of the Hindu Kush and the ranges around it. Modern breeding carried that solution down the mountain and polished it, but the logic of the plant is to this day the logic of the terrain. The examples referred to below are drawn from the range at https://kushindicaseeds.com and its catalogue goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the argument though holds for any true indica out of any seed bank. Reading the terrain turns out to be the quickest way to read the pack.
A Dry Corner of Central Asia
The Hindu Kush stretches roughly eight hundred kilometres from the middle of Afghanistan into northern Pakistan, and the wider indica homeland extending across to the Indian Himalaya on one side and the lowlands of the Central Asian plateau on the other. Cannabis has been cultivated there over a very long time, mainly for hashish, and selected generation after year by people who wanted resin rather than anything else: resin that could be sieved and sieved off a plant that would have ripened before the first snow.
That is a separate selection to the one that produced the tropical sativas, in which seasons barely vary and the plant could flower for half a year. Everything that follows is a outcome of four conditions about the terrain: it is high, it is arid, its summer is short, and the nights turn cold early. The sequence that they are taken here hardly matters; a plant meets all of them in the same once.
Anthocyanin and the Autumn
Mountain nights fall below ten degrees weeks before the days do, and a good number of indica lines react to that cold by producing anthocyanin, the same pigment that colours autumn leaves red. On the plant it shows as purple in the bracts, leaves and occasionally the stem, which it does nothing for the grower beyond look striking.
A point to take from it is a matter of lineage, rather than decorative. The capacity to turn is carried out of specific high-altitude stock, and a line that purples every time with a cold last two weeks has that origin whatever the name claims. Strains sold as “purple” that only turn with extreme cold, or never really, usually carry the colour in only the name and nothing of it not in the plant. Chilling the room during the last weeks draws the colour out if it is present and achieves nothing at all if it is absent; it also slows ripening, so it is a bargain and not a costless trick.
Built for a Desert Autumn
The old homeland is arid: low humidity, intense sun, rare rain through the flowering summer. A plant there has two pressures that its resin solves at once. It needs to shield its flowering parts from ultraviolet exposure, and it must keep water inside the flower through weeks of dry wind. A heavy coat of trichomes do both: their heads block the ultraviolet and their waxy layer reduces water loss. Selection for hashish on top of that pushed the resin even harder, because resin was always the crop.
Dense bud structure belongs with the same story: a tightly packed bud loses less water than an open one in arid air. In a tent these two qualities arrive together, but just one of them is always an advantage. The resin is. The density turns into a liability the moment the air is damp: a bud built to hold water in a desert holds it equally well in a damp room, and botrytis spreads in a hard indica cola more quickly than in anything an equator has ever produced. The quality that moves the seed is the same trait that needs a drier room during the final few weeks.
Altitude: Why the Plant Is Short
Much of the old growing land sits from a thousand five hundred and three thousand metres. Up that height the air is thin, the UV load is heavy, the wind is constant and every centimetre of stem above the soil takes resources the plant can ill spare. A tall plant on such ground loses more, breaks more and gains nothing for the height, since there is no canopy to clear.
The population which survived is low: 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 pure indica line gains maybe half its height again in flower whereas a sativa doubles, fits beneath a lamp with a modest gap and seldom needs tying down. Anyone short on limited height buy indica for this reason, and it is the mountain, not the breeder, that those growers are relying on.
Seven Weeks Before the Snow
At two thousand metres the growing window is short, and the autumn comes early and hard. A plant that took fourteen weeks to ripen from the days began to shorten never make seed in such ground, so its genes dropped out of the population. What remained reacts fast to the first shortening days and finishes in about seven to nine weeks after the signal.
In a tent that reflex is the single most frequently valued indica quality. Switch to twelve hours and the plant moves at once, grows over a couple of weeks and stacks flower for the remainder of a short cycle. The fastest strains at Kush Indica Seeds come in in about 7 weeks from the switch, and that permits as many as five or six harvests a year out of one room whereas a classic sativa allows perhaps two. That speed is not cleverness on the breeder’s side; it is the first snow written into the plant’s own clock.
The Fat Leaf
The indica leaf is broad, heavy and dark, and only a few broad lobes where a sativa fan leaf carries many thin ones. Two things in the terrain select for the broad shape. High-altitude air and intense sun put a high photon dose on each square centimetre, so a wide leaf gathers plenty without much surface; a large narrow-fingered leaf would just scorch. And steady wind shreds fine leaves, whereas a stout, short-petioled leaf stays put.
The dark colour is pigment packed densely in a heavy leaf, and one part of the same answer. To the tent these features matter in one practical way: a dense indica canopy blocks light from everything below the top layer much more completely than a sativa’s, which means the lower flowers of an unmanaged indica finish in small and weak. Growers who remove a few large leaves in week three are undoing, a little, what the mountain put there for many thousands of years.
The Valley Names on the Pack
Most indica pack names carry the names of places or derive from them, and the names are more useful than most buyers look. “Afghani” usually means a population out of the Mazar-i-Sharif region, which is the typical short, hash-plant, early-finishing type. “Hindu Kush” in a listing points to the high range itself and often to material taken on the eastern side. “Chitral” and “Mazar” point to particular valleys with their own recognisable types, the first often purpling and the latter heavy and slower for an indica. Kush Indica Seeds gives the collection region on each line where it is known, which turns the name from from a flavour to a datum the grower can use.
Most indica packs on sale is worked stock many generations removed from the original collection, bred for consistency and not to preserve the variation a pure landrace holds; a buyer who wants the spread needs to shop for packs described as pure reproductions and expect the surprises that arrive with them.
Taking the Plant Off the Mountain
Each trait discussed above was a answer to the pressure which a tent does not impose, and any solution that has lost its problem does either of two things: it becomes a cost-free advantage or it turns into a hazard. The fast finish and the short frame are advantages, because no condition in a room penalises a plant for them. The density and the heavy canopy are hazards, because the dry wind that made sense of them is gone and the still air of a sealed room has exactly the reverse influence.
That is why the indica grow goes well or goes wrong on one variable far more than on any other: humidity during the final few weeks. A grower who holds it low is rewarded with the dense, frosted, fast flower the mountain built; one that does not is punished with mould in the best colas, where the the plant was arranged the plant to hold moisture in. In a room, the mountain is to be reconstructed in the final two weeks: cool, dry, moving air. All that remains about running indica is forgiving precisely since the plant was selected for somewhere hard.
The Drift of a Word
The word that lent the mountains its name has since moved further from it than any other in cannabis. “Kush” in a current seed name can refer to an true Hindu Kush reproduction, a Californian Coast hybrid with one Kush ancestor, or a line named Kush since the breeder liked the sound of it. A OG Kush line, and this accounts for most of the appearances of the word today, is probably more sativa-leaning than a good deal of the stock it borrows the name from, while its stretch, finishing time and leaf shape show as much.
A practical reading is the one that applies throughout this article: look past the word and go back to the terrain. A listing which states an modest stretch, a flowering 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 tall habit, eleven weeks and airy buds is selling something somewhere else wearing a mountain name. The seed remembers the place it was shaped from; the label often has forgotten.