Each quality that moves an indica seed was bred there by a range of mountains. The short stature, the seven-to-nine-week flowering, the dense resinous buds, the broad blue-green leaf, the colour that appears when the nights turn cold: none of them is a breeder’s design. They are the answers a population arrived at through many thousands of years to a specific set of pressures, at high altitude, in a short dry season, across the valleys of the Hindu Kush and the ranges around it. Modern breeding took that answer off the mountain and polished it, but the logic of the plant is still the logic of the place. The lines referred to in what follows come from the range at https://kushindicaseeds.com and its stock goes back to Afghanistan, northern Pakistan and the Indian Himalaya; the account though applies to any true indica from any shop bank. Knowing the terrain is the quickest way to understand 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 broader indica homeland spilling across to the western Himalaya to one side and the deserts of the Afghan plateau on the other. The plant has been cultivated there over centuries, chiefly for hashish, and chosen year after year by people who needed resin above anything else: something that could be rubbed and sieved from a plant that had ripened before the autumn snow.
This is a separate history to the one that produced the tropical sativas, in which daylength hardly vary and the plant could flower for most of a year. Everything that follows is the outcome of a handful of conditions about the place: it is high, it is dry, its growing season is short, and the nights turn cold early. The order in which they are discussed below hardly matter; a plant experiences every one of them in the same once.
Built for a Desert Autumn
The old homeland is arid: thin humidity, intense sun, little rainfall in the flowering season. A plant in such a place has two pressures which its resin answers at once. It must protect its reproductive parts from ultraviolet exposure, and it needs to hold water inside the bud through weeks of dry wind. Trichomes do both: the heads block the ultraviolet and the coating reduces water loss. Selection for hashish then drove the trait further, since resin was always the crop.
Tight flower structure belongs with the same story: a tightly packed bud loses less water than an airy one in arid air. Inside a tent these two qualities arrive together, but just one of them is unconditionally an advantage. The resin is. The density turns into a liability the instant the air is humid: a bud shaped to hold water in a desert holds it just well in a damp tent, and bud rot moves in a dense indica cola faster than through anything an equator ever made. The trait that moves the seed is the same trait that needs a dehumidifier in the final three weeks.
Anthocyanin and the Autumn
Mountain nights fall below ten degrees weeks before the afternoons follow, and a good number of indica lines respond to that cold by making anthocyanin, the same pigment that turns autumn leaves red. In the plant it appears as purple through the bracts, leaves and occasionally the stem, and it offers nothing for the grower except looking beautiful.
A point to taking from the colour is genetic, not cosmetic. The tendency to turn is carried from specific high-altitude stock, and a strain that purples every time in a cool last two weeks has the origin regardless of what the label says. Lines marketed as “purple” that will only turn under extreme cold, or not really, typically have the colour in the name and nothing of it in the genes. Chilling the room in the last weeks brings the colour out if it is present and achieves nothing where it does not; it also checks the finish, so it is a trade and not a costless trick.
The Low Frame
A good deal of the old growing land lies between a thousand five hundred and three thousand metres. Up at that height the air is thin, the UV exposure is intense, the wind is constant and each centimetre of stem over the soil costs water the plant can ill afford. A tall plant on such terrain loses faster, snaps more and gains nothing for its height, because there is no canopy to clear.
The population that survived is compact: short internodes, a single thick main stem, branches held close, frequently wider than it is tall. In a tent that translates straight: a true indica line stretches perhaps half its height over in flower whereas a sativa doubles, fits beneath a lamp at a modest modest distance and rarely requires tying at all. Anyone short on limited headroom choose indica for this reason, and it is the mountain, not the breeder, that they are thanking.
Wind and Sun: Why the Leaf Is Broad and Dark
The indica fan leaf is broad, thick and dark, with only a few broad fingers where a sativa leaf has more thin ones. Both pressures about the terrain select for the broad shape. High-altitude air and hard sun mean an heavy photon load on each square centimetre, so a broad leaf catches plenty and does not need a lot of area; a big narrow-fingered leaf would simply burn. And steady wind tears thin foliage, whereas a thick, short-stalked leaf holds.
The deep colour is pigment packed densely into a thick leaf, which is one part of the same adaptation. For the tent these features count in a single practical respect: a broad-leafed indica canopy shades all growth below the top layer much more thoroughly than a sativa’s, which means the lower buds on an unmanaged indica finish in airy and loose. Growers that strip a few few large leaves at mid-flower are reversing, carefully, something the mountain did for many thousands of years.
Finishing Before the Frost
Above two thousand metres the frost-free season is brief, and the autumn arrives quickly and comes hard. A plant that took fourteen weeks to finish after the days began to shorten did not set seed on such ground, and its genes left the population. The plant that remained responds sharply to shortening days and finishes in about seven to nine weeks after the signal.
Indoors that response is the one most valued indica trait. Flip to twelve hours and the plant moves immediately, grows over a fortnight and fills flower for the remainder of a brief run. The fastest strains at Kush Indica Seeds come in in about 7 weeks after the switch, which allows as many as five or six harvests a year from one space whereas a classic sativa gives perhaps two. That difference is no cleverness on the breeder’s side; it is the first snow encoded into the plant’s calendar.
Reading the Place Names
Most indica pack names are the names of places or descend from them, and the places are far more useful than they look. “Afghani” usually refers to stock from the north region, and the typical squat, hash-plant, fast-finishing type. “Hindu Kush” in a listing points to the central range proper and frequently to material taken on the Pakistani side. “Chitral” or “Mazar” name particular valleys that have their own recognisable types, the former frequently purpling and the latter large and late for an indica. Kush Indica Seeds gives the collection area on each line whenever it is documented, and that turns the name from from a brand to a fact the grower can use.
Most indica packs on sale is worked material several generations from the original collection, selected for uniformity and not for the spread of a pure landrace carries; a buyer who is after the population itself has to shop for packs labelled as pure reproductions and accept the variation which come with the label.
Where the Adaptations Turn Against You
Every trait described above was a answer to the pressure that a tent does not impose, and any solution without its problem does either of two ways: it becomes a cost-free bonus or it becomes a cost. The fast finish and the short frame are bonuses, because no condition in a room penalises them. The density and the broad canopy become hazards, since the arid air that made sense of them is absent and the still atmosphere of a sealed room does exactly the opposite influence.
That is why the indica grow goes well or fails in a single factor more than any other: humidity during the last few weeks. A person that holds it down gets the hard, frosted, early flower the mountain bred; one who does not gets mould in the best colas, which is the the plant was arranged the plant to hold moisture in. Indoors, the mountain has to be reconstructed for the final two weeks: cool, dry, moving air. All else about growing indica is forgiving precisely because the plant was bred for somewhere much harder.
Kush on the Label
The word that lent the mountains its name has travelled further from it than any other in cannabis. “Kush” in a current pack listing can mean an true Hindu Kush landrace, a Californian Coast hybrid carrying one Kush ancestor, or a strain called Kush because the seller thought the sound of it. A famous OG Kush line, and this dominates the use of the word today, is probably more sativa-influenced than many of the plants it takes the name from, while its stretch, flowering time and leaf shape say as.
The practical reading is the same one that holds throughout this article: look past the word and go back to the terrain. A listing that states a low stretch, a flowering time below nine weeks, a hard bud and a wide leaf is selling a mountain plant regardless of what it is called; one that gives a lanky habit, twelve weeks and open flowers is describing something else with a borrowed name. The seed carries where it was shaped from; the name often has forgotten.