Every trait that moves an indica seed was put there by a range of mountains. The short stature, the seven-to-nine-week flowering, the hard frosted buds, the broad blue-green leaf, the colour that comes in when the nights turn cold: not one of them is a breeder’s invention. They are the solutions a plant found through many thousands of years to a particular combination of pressures, in high altitude, in a brief dry, cold season, on the valleys of the Hindu Kush and the mountains around it. Breeders carried that answer down the mountain and polished it, but the shape of the plant is to this day the shape of the terrain. The examples referred to in what follows are drawn from the range at https://kushindicaseeds.com whose catalogue goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the argument itself applies for any true indica out of any shop bank. Knowing the terrain turns out to be the quickest way to understand the pack.
The Range
The Hindu Kush runs roughly eight hundred kilometres from central Afghanistan towards northern Pakistan, and the wider indica zone extending over to the western Himalaya to one side and the lowlands around the Central Asian plateau on the other. Cannabis has been grown there for a very long time, chiefly for hashish, and selected year by year by people who needed resin rather than any other quality else: resin that could be sieved and pressed off a plant that had finished before the autumn snow.
This is a separate history from the one that produced the tropical sativas, in which seasons barely vary and the plant was free to flower for most of a year. Everything that comes below is a consequence of a handful of conditions about the place: it is high, it is dry, the summer is short, and the nights turn cold fast. The order in which they are taken here does not matter; a plant experiences every one of them at season.
Dry Air: Why the Buds Are Dense and Resinous
The traditional zone is dry: thin humidity, intense sun, little rainfall in the late summer. A plant in such a place has two problems which its resin answers at once. It must protect its flowering tissue from ultraviolet light, and it must hold water in the bud through weeks of dry wind. A heavy coat of trichomes do both: their heads absorb the ultraviolet and their waxy layer reduces moisture loss. Selection for hashish on top of that drove the resin further, because resin was the crop.
Tight flower form goes with the same story: a closely clustered bud gives up less water than an open one in arid air. In a tent these two traits come together, but just one of them is always welcome. The resin is. The density turns into a risk the instant the air is humid: a bud built to hold water in a desert holds it just as well in a wet tent, and botrytis spreads through a dense indica cola faster than in any flower an equator ever made. The quality that sells the seed is the same trait that needs a drier room during the last few weeks.
Seven Weeks Before the Snow
At two thousand metres the growing season is brief, while the autumn comes early and decisively. A plant which needed fourteen weeks to finish after the days started to draw in did not set seed on that ground, so the genes dropped out of the population. The plant that remained reacts sharply to shortening days and finishes in about seven to nine weeks from the cue.
In a tent that response is the one most frequently cited indica trait. Flip to twelve hours and the plant commits at once, grows for a fortnight and fills flower over the remainder of a brief run. The fastest lines at Kush Indica Seeds finish at about 7 weeks after the switch, and that permits five or six harvests a year out of one room whereas a long sativa gives two. That speed is not cleverness on the breeder’s part; it is the first snow encoded into the plant’s own calendar.
The Fat Leaf
An indica leaf is broad, heavy and dark, and few wide fingers where a sativa leaf has many narrow ones. Both pressures about the climate favour that shape. High-altitude air and hard sun put an high light dose on each square centimetre, and a broad leaf gathers plenty without needing much area; a big narrow-fingered leaf would just burn. And steady wind shreds thin foliage, while a stout, short-petioled leaf holds.
The deep colour is chlorophyll packed thickly into a thick leaf, which is one part of the same adaptation. For the tent these leaves count in one practical respect: a broad-leafed indica canopy shades everything below the top tier far more thoroughly than a sativa’s, which means the lower flowers of an unmanaged indica come in small and loose. People that strip a few fan leaves at mid-flower are reversing, a little, what the range put there for many thousands of years.
The Low Frame
A good deal of the traditional growing zone lies between a thousand five hundred and three metres. At at that height the air is thin, the UV load is intense, the wind is relentless and every centimetre of stem over the soil takes water the plant cannot afford. A tall plant on such ground dries out faster, breaks sooner and gains nothing for the extra height, since there is no canopy to clear.
The population that persisted is low: tight internodes, a single dense central stem, side branches held close, frequently broader than it is tall. In a tent that carries over directly: a true indica line gains maybe half its height over through flower where a sativa doubles, fits under a lamp with a modest gap and seldom needs training at all. Growers short on little headroom choose indica for precisely this reason, and it is the mountain, not the breeder, that those growers are thanking.
The Colour of a Cold Valley
Mountain nights drop below ten degrees weeks before the days follow, and a good number of indica lines react to that chill by producing anthocyanin, the same compound that colours a maple leaf purple. On the plant it shows as purple in the bracts, leaves and occasionally the stem, which it does little for the grower beyond looking striking.
The thing worth taking from the colour is genetic, rather than decorative. The tendency to turn is carried from specific cold-valley stock, and a line that colours reliably in a cold last fortnight has the ancestry whatever the name claims. Lines marketed as “purple” that only colour with extreme cold, or never at all, usually carry a word in only the name and nothing of it not in the genes. Chilling the room during the last weeks draws the colour out if it is present and does nothing where it does not; it at the same time checks the finish, so it is a trade rather than a costless trick.
The Valley Names on the Pack
The great majority of indica pack labels are the names of places or descend from one, and the names are far more useful than they look. “Afghani” usually refers to a population out of the north region, and the classic short, resinous, early-finishing type. “Hindu Kush” in a listing points to the high mountains itself and often to material taken on the Pakistani side. “Chitral” or “Mazar” name particular valleys with their own local forms, the former frequently purpling and the second heavy and late for an indica. Kush Indica Seeds gives the origin region on each pack whenever it is known, and that turns the name from from a brand to a fact the grower can use.
Most indica seed on sale is worked material many generations from the valley, selected for consistency and not for the variation of a true landrace holds; a buyer who is after the spread needs to look for packs described as unselected landrace stock and accept the variation which arrive with the label.
What Changes in a Tent
Each trait discussed above was a answer to the condition which a tent does not present, and a trait without its problem does either of two things: it turns into a free bonus or it becomes a cost. The speed and the short stature become advantages, because nothing in a room penalises them. The density and the broad canopy are hazards, because the dry wind that justified them is gone and the damp air of a sealed room has precisely the opposite influence.
This is why the indica grow succeeds or fails on one factor more than on any other: humidity in the last three weeks. A person who keeps it low gets the dense, frosted, fast flower the mountain bred; one who does not gets rot in the best colas, where exactly where the mountain had trying hardest to hold water in. Indoors, the terrain has to be rebuilt for the last two weeks: cool, dry, with moving air. All that remains about growing indica is easy precisely because the population was selected for a place hard.
Kush on the Label
The word that gave the mountains its name has since travelled further from it than almost any other in cannabis. “Kush” on a current pack name may mean an unselected Hindu Kush reproduction, a West Coast hybrid with one Afghan grandparent, or a strain named Kush since the seller thought the sound would sell. A famous OG Kush line, which accounts for most of the use of the word in the market, is probably more sativa-influenced than many of the stock it borrows the word from, while its stretch, flowering time and leaf shape say as much much.
The practical reading is the same one which applies across this article: look past the word and go back to the terrain. A listing which states a modest stretch, a flowering time below nine weeks, a dense bud and a broad leaf is describing a mountain plant whatever it is called; one that states a tall frame, eleven weeks and airy flowers is selling a plant from else with a borrowed name. The seed remembers where it was shaped from; the label frequently has forgotten.
