Every trait that moves an indica seed has been put there by a range of mountains. The short stature, the seven-to-nine-week flowering, the hard resinous flowers, the broad dark leaf, the purple that comes in as the nights go cold: none of these is an design. They are the solutions a plant arrived at over thousands of years to a particular combination of problems, at high altitude, in a brief dry, cold summer, across the slopes of the Hindu Kush and the mountains beyond it. Breeders took that solution off the mountain and refined it, but the logic of the plant is to this day the shape of the place. The lines referred to below come from the range at https://kushindicaseeds.com and its stock goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the argument though applies to any genuine indica from any seed catalogue. Reading the terrain turns out to be the most reliable way to understand the pack.

A Dry Corner of Central Asia

The Hindu Kush runs for about eight hundred kilometres out of central Afghanistan towards northern Pakistan, with the broader indica homeland extending over into the western Himalaya on one side and the lowlands around the Afghan interior to the other. Cannabis has been grown there over centuries, mainly for hashish, and chosen generation by generation by farmers who wanted resin above any other quality else: something that could be sieved or sieved from a plant that had ripened ahead of the autumn frost.

This is a separate history from the one that shaped the equatorial sativas, in which daylength hardly vary and the plant could flower for half a year. All that follows is a outcome of four facts about the place: it is high, it is arid, its summer is short, and the nights turn cold fast. The sequence that they are discussed here does not matter; a plant experiences every one of them in the same once.

The Colour of a Cold Valley

High-valley nights fall below ten degrees long before the days follow, and a good number of indica lines react to that cold by making anthocyanin, the same compound that turns autumn leaves purple. In the plant it shows as purple in the calyxes, fan leaves and occasionally the stem, which it does nothing for the smoker except looking beautiful.

A point to take from the colour is genetic, rather than cosmetic. The capacity to turn is carried out of particular cold-valley stock, and a strain that purples reliably with a cold final two weeks carries that ancestry regardless of what the name says. Lines sold as “purple” that will only colour with extreme cold, or not at all, usually have a colour in only the name and not in the plant. Chilling the room in the final weeks brings the colour out if it is present and achieves nothing if it does not; it at the same time checks ripening, so it is a bargain rather than a free trick.

Finishing Before the Frost

Above two thousand metres the growing window is brief, while the autumn arrives quickly and decisively. A plant which needed fourteen weeks to finish from the days began to shorten never make seed on that terrain, and the genes left the population. The plant that remained reacts fast to the first shortening days and ripens in about seven to nine weeks after the signal.

Indoors that response is the single most frequently valued indica trait. Flip to twelve hours and the plant commits at once, grows over a couple of weeks and stacks flower over the rest of a brief cycle. The fastest strains at Kush Indica Seeds finish in about 7 weeks after the flip, which permits as many as five or six cycles a year from one space where a classic sativa allows two. This difference is not cleverness on the breeder’s part; it is the snowline written into the plant’s own clock.

The Fat Leaf

The indica leaf is broad, heavy and a deep green, and only a few broad fingers whereas a sativa leaf carries more narrow ones. Both things in the climate favour the broad form. Thin air and hard sun mean a high photon load per square centimetre, and a wide leaf catches plenty without needing much surface; a large thin leaf would simply scorch. And constant wind shreds thin leaves, while a stout, short-stalked leaf holds.

The deep colour is chlorophyll loaded densely into a heavy leaf, and part of the same adaptation. For the tent these features count in a single everyday respect: a broad-leafed indica canopy blocks light from all growth beneath the top tier far more completely than a sativa’s, which means lower buds of an untrained indica finish in airy and weak. People who strip a few large leaves at week three are undoing, a little, what the mountain did over thousands of years.

Resin as Sunscreen and Sealant

The old homeland is arid: thin humidity, intense sun, little rainfall through the flowering summer. A plant there has two pressures that resin solves together. It needs to shield its flowering tissue from ultraviolet exposure, and it must hold water inside the flower through a long stretch of dry wind. Trichomes do both: the resin heads absorb the ultraviolet and their waxy layer reduces moisture loss. Farmers for hashish on top of that drove the resin further, since resin was always the crop.

Tight flower structure belongs to the same story: a closely packed bud gives up less water than an open one in arid air. Inside a tent these two traits come as a pair, but just one of them is always welcome. The resin is. The density turns into a liability the moment the air is damp: a bud built to hold water in a desert retains it just well in a damp tent, and bud rot moves through a hard indica cola faster than through any flower an equator has ever produced. The quality that sells the seed is the one that needs a drier room in the final three weeks.

The Low Frame

A good deal of the old growing zone lies from fifteen hundred and three thousand thousand metres. Up that height the air is thin, the ultraviolet load is heavy, the wind is relentless and every centimetre of stem above the ground takes water the plant can ill spare. A tall plant on such terrain loses more, snaps sooner and gets little for the height, since there is no canopy to clear.

The population which persisted is low: short internodes, a strong dense main stem, branches kept close, often wider than it is tall. In a tent that carries over directly: a true indica seed stretches maybe half its height again through flower whereas a sativa doubles, sits under a light at a modest modest distance and seldom requires training at all. Anyone with little height buy indica for precisely this trait, and it is the mountain, not the breeder, that they are thanking.

Afghani, Mazar, Chitral, Hindu Kush

The great majority of indica pack labels are the names of places or derive from them, and the names are more useful than they look. “Afghani” generally means stock out of the Mazar-i-Sharif of Afghanistan, and a classic squat, hash-plant, early-finishing form. “Hindu Kush” on a name points to the high mountains proper and often to material taken on the Pakistani side. “Chitral” and “Mazar” point to specific valleys that have their own recognisable forms, the former often purpling and the latter heavy and slower for an indica. Kush Indica Seeds lists the origin region for each pack whenever it is documented, and that turns the name from a flavour into a datum the grower can use.

Almost all indica packs on sale are worked stock many generations removed from the original collection, selected for consistency rather than for the variation of a true landrace carries; a buyer who is after the population itself has to look for lines described as pure reproductions and accept the surprises which come with the label.

Where the Adaptations Turn Against You

Every trait discussed above was an answer to the condition which a tent does not present, and a solution without its problem does one of two ways: it turns into a free bonus or it becomes a cost. The fast finish and the low frame are advantages, because nothing in a room penalises them. The density and the broad leaf are hazards, because the dry wind that justified them is absent and the still air of a closed room has exactly the reverse effect.

This is why an indica grow succeeds or fails in one factor more than on any other: humidity during the final three weeks. A person that holds it low gets the dense, frosted, fast flower the mountain built; one who does not gets rot inside the best colas, which is the the plant had trying hardest to keep moisture in. In a room, the mountain has to be rebuilt in the final two weeks: cool, dry, moving air. Everything that remains about growing indica is forgiving precisely since the plant was selected to survive somewhere much harder.

The Drift of a Word

The word that lent the mountains its name has travelled further from it than any other in cannabis. “Kush” in a current seed listing can refer to a unselected Hindu Kush landrace, a West Coast hybrid with one Kush grandparent, or a strain named Kush since the breeder liked the sound would sell. The famous OG Kush family, and this accounts for most of the appearances of the word today, is probably as much sativa-leaning than many of the stock it borrows the name from, while its stretch, finishing time and leaf say as much much.

The practical reading is the same one that applies across this page: look past the word and go back to the terrain. A listing which states an modest stretch, a flowering time below nine weeks, a dense flower and a wide leaf is selling a mountain plant whatever it is called; one that states a lanky frame, twelve weeks and airy buds is selling a plant from somewhere else wearing a borrowed name. The seed remembers where it was shaped from; the label often has forgotten.