Each quality that sells an indica seed was put there by a mountain. The squat frame, the fast flowering, the dense resinous flowers, the broad dark leaf, the purple that appears when the nights turn cold: not one of these is an design. They are the answers a population found over thousands of years to a specific combination of pressures, in great altitude, in a brief dry season, on the slopes of the Hindu Kush and the ranges around it. Modern breeding carried that answer down the mountain and polished it, but the shape of the plant is still the logic of the place. The lines referred to below come from the range at https://kushindicaseeds.com and its catalogue traces to Afghanistan, northern Pakistan and the Indian Himalaya; the account though applies to any true indica out of any shop catalogue. Reading the terrain turns out to be the most reliable way to read the pack.
Where the Population Formed
The Hindu Kush stretches for about eight hundred kilometres out of the middle of Afghanistan towards northern Pakistan, with the wider indica homeland extending across to the western Himalaya to one side and the deserts around the Afghan interior to the other. The plant has been cultivated there for centuries, chiefly for hashish, which means chosen year by generation by farmers who wanted resin above any other quality else: resin that could be rubbed and pressed from a plant that had finished ahead of the autumn frost.
This is a separate selection to the one that shaped the tropical sativas, in which daylength hardly change and the plant could grow for half a year. All that comes below is a outcome of a handful of conditions about the terrain: it is high, it is arid, the summer is short, and its nights go cold early. The sequence in which they are taken below does not matter; a plant meets every one of them at season.
Anthocyanin and the Autumn
Mountain nights drop below ten degrees weeks before the afternoons follow, and many indica lines react to that cold by producing anthocyanin, the same compound that turns autumn leaf purple. On the plant it appears as purple through the calyxes, fan leaves and sometimes the stem, and it does nothing for the smoker beyond look striking.
The thing to taking from it is genetic, rather than cosmetic. The tendency to turn is inherited from specific high-altitude populations, and a strain that colours every time in a cool final two weeks has the ancestry regardless of what the name says. Strains marketed as “purple” that will only turn under heavy cold, or never at all, typically have a colour in the name and not in the plant. Chilling the room in the final weeks brings the colour forward if it exists and does nothing if it does not; it at the same time slows the finish, so it is a trade rather than a free effect.
The Short Season: Why It Flowers Fast
At two thousand metres the growing season is brief, while the autumn arrives early and comes decisively. A plant that needed fourteen weeks to ripen after the days started to draw in did not make seed in such ground, and its genes dropped out of the population. The plant that remained responds sharply to shortening days and ripens in roughly seven to nine weeks from that cue.
In a tent that response is the single most frequently cited indica quality. Switch to twelve hours and the plant moves at once, stretches over a couple of weeks and fills flower over the remainder of a brief cycle. The fastest lines at Kush Indica Seeds finish at around 7 weeks after the flip, and that allows five or six cycles a year from one space where a long sativa gives two. This difference is not efficiency on the breeder’s part; it is the snowline written into the plant’s clock.
Height Is a Cost at Two Thousand Metres
A good deal of the old growing land sits between a thousand five hundred and three metres. Up that height the air is thin, the UV exposure is heavy, the wind is relentless and every centimetre of stem over the soil costs resources the plant cannot afford. A tall plant on such ground loses faster, breaks more and gets nothing for the height, since there is no canopy to outgrow.
The plant that survived is low: short internodes, a strong thick main stem, branches held close, often wider than it is tall. In a tent that carries over straight: a true indica seed stretches perhaps half its height again in flower where a sativa doubles, fits under a light at a short gap and seldom needs tying down. Growers with little height choose indica for this reason, and it is the mountain, not the breeder, that those growers are thanking.
Resin as Sunscreen and Sealant
The traditional zone is dry: low humidity, intense sun, little rainfall through the late season. A plant there has two problems that resin answers together. It must protect its reproductive parts from UV light, and it must hold water in the bud over weeks of desiccating wind. A heavy coat of trichomes do both: the heads block UV and their waxy layer slows moisture loss. Selection for hashish then pushed the resin even harder, since resin was the crop.
Dense flower structure goes to the same cause: a closely clustered bud loses less water than an airy one in dry air. Inside a tent these two qualities come together, and just one of them is unconditionally welcome. The resin is. The density turns into a liability the instant the room is humid: a bud built to hold water in a desert holds it equally well in a damp room, and botrytis moves in a dense indica cola more quickly than in anything an equator has ever produced. The quality that sells the seed is the one that calls for a drier room during the last three weeks.
The Fat Leaf
The indica fan leaf is broad, heavy and a deep green, with few wide fingers where a sativa leaf carries more thin ones. Both pressures about the climate favour that form. High-altitude air and hard sun put an high light dose on each square centimetre, and a broad leaf catches plenty without a lot of area; a big thin leaf in that light just scorch. And constant wind tears thin foliage, whereas a thick, short-petioled leaf holds.
The deep colour is pigment packed densely in a thick leaf, and one part of the same answer. To the grower these features count in a single everyday respect: a dense indica canopy shades all growth beneath the top tier much more completely than a sativa’s, which means lower buds of an unmanaged indica finish in small and loose. Growers who strip a few large leaves at week three are reversing, carefully, something the mountain did over thousands of years.
Afghani, Mazar, Chitral, Hindu Kush
Most indica pack labels are place places or derive from them, and the names are far more informative than they look. “Afghani” generally means stock out of the Mazar-i-Sharif of Afghanistan, and the typical squat, hash-plant, fast-finishing form. “Hindu Kush” in a name refers to the high mountains itself and frequently to material taken on the eastern side. “Chitral” and “Mazar” point to specific valleys that have their own recognisable forms, the first frequently purpling and the second heavy and slower for an indica. Kush Indica Seeds gives the origin region for each line whenever it is documented, which turns the name a brand into a fact the grower can plan around.
Almost all indica packs on sale is worked material several generations from the valley, bred for uniformity and not to preserve the variation of a pure landrace carries; a buyer who wants the population itself has to look for packs described as pure landrace stock and accept the surprises which arrive with them.
What Changes in a Tent
Each adaptation described above was a solution to a condition which a tent does not present, and a solution that has lost its problem does one of two ways: it turns into a free advantage or it becomes a cost. The fast finish and the low stature are advantages, since no condition in a tent penalises them. The density and the broad canopy become hazards, since the dry wind that justified them is absent and the still atmosphere of a sealed room does precisely the opposite effect.
This is why an indica grow succeeds or goes wrong on a single factor more than any other: humidity in the last few weeks. A person that holds it down is rewarded with the hard, frosted, early harvest the mountain bred; one that does not is punished with rot in the best colas, which is exactly where the mountain was trying the plant to hold moisture in. Indoors, the mountain is to be reconstructed in the final fortnight: cool, dry, with moving air. Everything that remains about running indica is forgiving precisely since the plant was selected to survive somewhere hard.
The Drift of a Word
The word that lent the range its name has travelled a long way from it than any other in cannabis. “Kush” on a modern pack listing may mean a unselected Hindu Kush landrace, a Californian Coast hybrid carrying one Afghan grandparent, or a line named Kush because the breeder liked the sound would sell. The famous OG Kush line, and this accounts for most of the use of the word today, is most likely as much sativa-leaning than many of the stock it borrows the word from, and its growth habit, finishing time and leaf show as much.
The usable rule is the same one which applies throughout this article: look past the word and go back to the terrain. A listing which gives a low stretch, a finishing time under nine weeks, a hard flower and a wide leaf is describing a mountain plant regardless of what it is called; one that gives a tall habit, eleven weeks and airy flowers is describing a plant from somewhere else with a borrowed name. The seed carries where it came by; the name frequently does not.