Each quality that moves an indica seed has been bred there by a range of mountains. The short frame, the fast flowering, the dense frosted flowers, the wide blue-green leaf, the purple that appears when the nights turn cold: not one of them is a breeder’s design. They are the solutions a plant arrived at over thousands of years to a particular set of pressures, at great altitude, in a short dry season, across the slopes of the Hindu Kush and the ranges beyond it. Modern breeding carried that solution off the mountain and polished it, but the logic of the plant is to this day the shape of the place. The examples pointed to below are drawn from the range at https://kushindicaseeds.com whose catalogue traces to Afghanistan, northern Pakistan and the Indian Himalaya; the account though applies to any true indica from any seed catalogue. Reading the terrain turns out to be the quickest way to understand the pack.
A Dry Corner of Central Asia
The Hindu Kush runs roughly eight hundred kilometres out of the middle of Afghanistan into northern Pakistan, with the wider indica zone spilling across into the western Himalaya on one side and the deserts of the Central Asian interior on the other. The plant has been cultivated there for a very long time, chiefly for hashish, which means selected generation after year by farmers who wanted a plant rather than anything else: resin that could be sieved or sieved off a plant that had ripened ahead of the first snow.
That is a separate history from the one that shaped the equatorial sativas, where daylength hardly vary and the plant could grow for half a year. Everything that comes below is a outcome of a handful of facts about the terrain: it is high, it is arid, its growing season is short, and the nights go cold early. The order that they are taken here hardly matters; a plant experiences all of them at season.
Built for a Desert Autumn
The traditional homeland is dry: low humidity, intense sun, little rainfall through the flowering summer. A plant there has two pressures that its resin answers at once. It needs to shield its flowering parts from ultraviolet light, and it needs to hold water inside the flower through weeks of desiccating wind. A heavy coat of trichomes does both: their resin heads absorb UV and the waxy layer slows water loss. Farmers for hashish then drove the trait further, because resin was the product.
Dense flower structure belongs to the same cause: a closely packed bud gives up less water than an airy one in dry air. In a tent those same qualities come together, but only one of them is always an advantage. The resin is. The density becomes a liability the instant the air is damp: a bud shaped to hold water in a desert holds it equally well in a wet room, and bud rot moves in a dense indica cola more quickly than through anything an equator has ever made. The quality that moves the seed is the one that needs a dehumidifier during the final few weeks.
The Colour of a Cold Valley
Mountain nights drop under ten degrees long before the afternoons do, and a good number of indica populations respond to that cold by making anthocyanin, the same pigment that colours autumn leaf red. In the plant it shows as purple in the calyxes, leaves and occasionally the stem, which it does little for the grower except look striking.
A thing worth take from it is a matter of lineage, not cosmetic. The capacity to colour is inherited from particular cold-valley stock, and a line that purples every time in a cold last two weeks carries the ancestry regardless of what the name says. Lines sold as “purple” that only colour with heavy cold, or not at all, typically carry a word in only the name and in the genes. Chilling the room in the last weeks draws the colour out where it exists and does nothing at all if it is absent; it also checks ripening, so it is a trade and not a free effect.
The Fat Leaf
The indica leaf is wide, heavy and a deep green, with only a few broad lobes where a sativa leaf has more thin ones. Both things in the climate select for the broad form. High-altitude air and intense sun put a heavy light load on each square centimetre, and a wide leaf catches plenty and does not need needing a lot of surface; a large narrow-fingered leaf in that light simply burn. And steady wind shreds fine foliage, while a stout, short-petioled leaf holds.
The dark colour is chlorophyll packed densely in a thick leaf, which is part of the same adaptation. To the grower these features count in one everyday way: a dense indica canopy shades everything beneath the top layer much more thoroughly than a sativa’s, so the lower buds of an unmanaged indica finish in airy and weak. People that remove a few few large leaves at mid-flower are reversing, carefully, something the range put there over many thousands of years.
Finishing Before the Frost
At two thousand metres the growing window is brief, while the autumn arrives quickly and comes decisively. A plant that took fourteen weeks to ripen after the days began to draw in did not make seed in such terrain, so the genes dropped out of the population. What stayed responds fast to the first shortening days and ripens in about seven to nine weeks after the cue.
Indoors that response is the one most cited indica quality. Flip to twelve hours and the plant moves immediately, grows for a fortnight and fills flower for the rest of a short run. The fastest strains at Kush Indica Seeds come in in about 7 weeks after the flip, and that allows five or six harvests a year from one space whereas a classic sativa gives two. That speed is not cleverness on the breeder’s part; it is the snowline encoded into the plant’s calendar.
Altitude: Why the Plant Is Short
Much of the traditional growing land lies from fifteen hundred and three thousand metres. At that height the air is thin, the ultraviolet exposure is intense, the wind is relentless and each centimetre of stem above the soil costs water the plant can ill afford. A tall plant on that terrain dries out faster, snaps more and gets nothing for its extra height, because there is no canopy to outgrow.
The plant which persisted is compact: tight internodes, a single dense central stem, branches kept close, frequently broader than it is tall. In a tent that carries over straight: a pure indica seed stretches maybe half its height over in flower where a sativa doubles, fits beneath a light with a modest gap and rarely needs training down. Anyone short on little height buy indica for precisely this trait, and it is the mountain, not the breeder, that those growers are relying on.
Afghani, Mazar, Chitral, Hindu Kush
The great majority of indica seed names are the names of places or derive from one, and the places are far more informative than they realise. “Afghani” usually means a population out of the Mazar-i-Sharif of Afghanistan, which is a typical squat, resinous, fast-finishing form. “Hindu Kush” in a listing refers to the high mountains proper and frequently to stock collected on the eastern side. “Chitral” and “Mazar” name specific valleys with their own local types, the first often colouring and the latter large and late for an indica. Kush Indica Seeds gives the origin area for each line where it is known, which makes the name a brand to a fact the grower can plan around.
Almost all indica seed on sale are hybrid material several generations from the valley, bred for consistency rather than for the variation of a true landrace carries; a buyer who is after the population itself needs to look for packs described as pure reproductions and expect the variation that come with the label.
What Changes in a Tent
Each adaptation discussed above was an answer to a pressure which a tent does not present, and a trait that has lost its pressure behaves either of two things: it becomes a cost-free advantage or it becomes a cost. The fast finish and the short stature become advantages, since no condition in a tent punishes a plant for them. The density and the heavy leaf become costs, since the dry wind that justified them is gone and the still air of a sealed room does exactly the opposite effect.
This is why the indica cycle succeeds or fails on a single factor far more than on any other: humidity during the final three weeks. A person that keeps it down gets the dense, resinous, early harvest the mountain bred; one who lets it rise gets mould in the thickest colas, where the the plant had arranged the plant to keep water in. In a room, the terrain is to be rebuilt for the final fortnight: cool, dry, with moving air. All else about running indica is easy exactly because the plant was selected to survive somewhere hard.
The Drift of a Word
The word that lent the mountains its name has moved further from it than almost any other in cannabis. “Kush” in a modern seed listing can refer to an unselected Hindu Kush reproduction, a Californian Coast hybrid carrying one Afghan grandparent, or a line called Kush since the seller thought the sound would sell. The famous OG Kush line, which dominates the use of the word today, is probably as much sativa-influenced than a good deal of the plants it borrows the word from, and its growth habit, flowering time and leaf shape show as much.
A practical rule is the one that holds throughout this article: look past the word and go back to the terrain. A listing which gives a low stretch, a flowering time under nine weeks, a hard flower and a broad leaf is describing a mountain plant whatever it is named; one that gives a lanky frame, twelve weeks and open buds is describing a plant from somewhere else wearing a mountain name. The seed carries the place it was shaped from; the label often does not.