Each quality that moves an indica seed was bred there by a mountain. The squat frame, the fast flowering, the hard frosted buds, the broad blue-green leaf, the purple that comes in when the nights go cold: none of them is an invention. They are the solutions a plant arrived at through many thousands of years to a particular set of problems, at high altitude, in a short dry, cold season, across the slopes of the Hindu Kush and the ranges around it. Modern breeding carried that solution off the mountain and refined it, yet the shape of the plant is to this day the logic of the terrain. The examples referred to in what follows come from the range at https://kushindicaseeds.com whose stock traces to Afghanistan, northern Pakistan and the Indian Himalaya; the argument itself applies to any true indica from any shop bank. Reading the terrain turns out to be the most reliable way to read the pack.
Where the Population Formed
The Hindu Kush runs for about eight hundred kilometres from the middle of Afghanistan towards northern Pakistan, with the wider indica zone extending over to the Indian Himalaya to one side and the deserts around the Central Asian plateau on the other. Cannabis has been grown there over a very long time, mainly for hashish, and selected generation by generation by farmers who needed resin above any other quality else: resin that could be sieved and sieved from a plant that would have ripened before the autumn snow.
That is a separate selection from the one that produced the tropical sativas, in which seasons barely change and the plant was free to flower for half a year. All that follows is the outcome of four facts about the terrain: it is high, it is dry, its summer is short, and the nights turn cold fast. The order that they are discussed here hardly matter; a plant meets all of them in the same season.
Built for a Desert Autumn
The traditional homeland is arid: thin humidity, hard sun, little rain in the late season. A plant in such a place has two pressures that its resin answers at once. It needs to protect its flowering parts from UV light, and it must hold water inside the bud through weeks of desiccating wind. Trichomes do both: the resin heads block the ultraviolet and their waxy layer reduces moisture loss. Farmers for hashish then pushed the trait even harder, because resin was the product.
Tight flower structure belongs with the same story: a closely clustered bud loses less water than an airy one in dry air. Inside a tent those two qualities come as a pair, but only one of them is always welcome. The resin is. The density turns into a liability the instant the air is humid: a bud shaped to hold water in a desert retains it equally well in a damp room, and bud rot spreads through a dense indica cola more quickly than through anything an equator ever made. The trait that sells the seed is the same trait that needs a dehumidifier during the final three weeks.
Height Is a Cost at Two Thousand Metres
A good deal of the old growing zone lies between fifteen hundred and three metres. At that height the air is thin, the ultraviolet load is heavy, the wind is constant and each centimetre of stem above the soil costs water the plant can ill spare. A tall plant in that terrain dries out more, snaps more and gains little for its height, since there is no canopy it needs to clear.
The plant which persisted is compact: tight internodes, a strong dense main stem, side branches kept close, frequently wider than it is tall. In a tent that translates straight: a true indica line gains perhaps half its height over through flower where a sativa doubles, fits under a lamp at a short gap and rarely requires tying down. Growers with little headroom buy indica for this reason, and it is the mountain, not the breeder, that those growers are thanking.
Wind and Sun: Why the Leaf Is Broad and Dark
An indica fan leaf is broad, thick and dark, with only a few broad lobes where a sativa fan leaf has more thin ones. Two things in the terrain favour the broad shape. High-altitude air and intense sun put an high photon load per square centimetre, and a broad leaf catches plenty and does not need needing a lot of surface; a big thin leaf in that light simply scorch. And steady wind shreds fine foliage, while a thick, short-petioled leaf stays put.
The dark colour is chlorophyll loaded thickly in a heavy leaf, which is one part of the same answer. To the tent the features count in one practical respect: a broad-leafed indica canopy shades all growth below the top layer much more completely than a sativa’s, so the lower flowers on an unmanaged indica come in airy and weak. People who strip a large leaves at mid-flower are undoing, carefully, something the range did for thousands of years.
The Short Season: Why It Flowers Fast
Above two thousand metres the frost-free season is short, while the autumn arrives quickly and hard. A plant which took fourteen weeks to ripen after the days began to shorten never set seed in such terrain, so the genes dropped out of the population. What remained responds fast to shortening days and ripens in about seven to nine weeks after the signal.
In a tent that response is the single most valued indica quality. Switch to twelve hours and the plant moves immediately, grows over a fortnight and stacks flower for the remainder of a short cycle. The quickest strains at Kush Indica Seeds come in in around 7 weeks from the switch, and that permits as many as five or six cycles a year from one room whereas a classic sativa allows two. This difference is not cleverness on the breeder’s part; it is the first snow written into the plant’s calendar.
Cold Nights: Why Some Go Purple
High-valley nights drop under ten degrees long before the afternoons follow, and a good number of indica populations respond to that cold by producing anthocyanin, the same compound that colours a maple leaf purple. On the plant it shows as purple through the calyxes, leaves and occasionally the stem, which it does nothing for the grower beyond looking beautiful.
The thing to take from the colour is genetic, not cosmetic. The capacity to turn is inherited out of particular cold-valley stock, and a line that purples reliably with a cool last fortnight carries that origin whatever the name says. Strains sold as “purple” that only colour with extreme cold, or not at all, usually have a colour in only the name and nothing of it in the plant. Chilling the room during the last weeks brings the colour forward if it is present and does nothing at all if it does not; it also checks ripening, so it is a trade and not a costless trick.
Reading the Place Names
The great majority of indica seed labels are the names of places or derive from them, and the names are more informative than most buyers look. “Afghani” usually refers to stock from the Mazar-i-Sharif region, and a typical short, hash-plant, fast-finishing form. “Hindu Kush” in a name refers to the high mountains itself and often to stock taken on the Pakistani side. “Chitral” and “Mazar” point to specific valleys with their own local forms, the first frequently colouring and the latter large and slower for an indica. Kush Indica Seeds gives the origin area on each pack where it is known, which makes the name from a flavour to a fact the grower can plan around.
Almost all indica seed on sale are worked stock many generations removed from the valley, bred for consistency and not to preserve the variation of a pure landrace holds; a buyer who wants the population itself needs to look for lines described as unselected landrace stock and expect the surprises which arrive with them.
What Changes in a Tent
Every adaptation described above was an answer to the condition which a tent does not impose, and any solution without its problem does one of two ways: it turns into a cost-free bonus or it turns into a hazard. The speed and the short stature are advantages, since nothing in a room penalises a plant for them. The density and the broad canopy are hazards, because the arid wind that justified them is absent and the damp atmosphere of a closed room does exactly the opposite effect.
That is why an indica grow goes well or fails in a single factor more than on any other: humidity in the last three weeks. A person that holds it low gets the dense, resinous, fast flower the mountain built; one who lets it rise is punished with mould in the thickest colas, which is the the mountain had trying hardest to keep moisture in. In a room, the mountain is to be rebuilt for the last two weeks: cool, dry, with moving air. All that remains about growing indica is easy exactly because the population was bred for somewhere hard.
The Drift of a Word
The word that lent the range its name has travelled a long way from it than any term in cannabis. “Kush” in a current pack listing can mean a unselected Hindu Kush landrace, a West Coast hybrid with one Kush grandparent, or a line called Kush since the seller liked the sound of it. The famous OG Kush family, and this dominates the use of the word today, is probably as much sativa-leaning than many of the plants it borrows the name from, while its stretch, finishing time and leaf show as much much.
A practical reading is the one that applies across this page: ignore the word and go back to the terrain. A listing which states a modest stretch, a flowering time under nine weeks, a hard bud and a broad leaf is selling a mountain plant regardless of what it is called; one that states a lanky frame, eleven weeks and airy buds is selling something else with a mountain name. The seed carries the place it was shaped by; the name often has forgotten.