Every quality that sells an indica seed has been bred there by a range of mountains. The short stature, the fast flowering, the hard resinous flowers, the broad dark leaf, the purple that appears as the nights go cold: none of them is an design. They are the answers a plant found over thousands of years to a particular set of pressures, in high altitude, in a brief dry season, on the valleys of the Hindu Kush and the mountains beyond it. Breeders took that answer off the mountain and refined it, but the logic of the plant is still the shape of the terrain. The lines referred to below are drawn from the range at https://kushindicaseeds.com and its catalogue traces to Afghanistan, northern Pakistan and the Indian Himalaya; the account itself holds to any true indica from any seed catalogue. Reading the terrain turns out to be the most reliable way to read the pack.
The Range
The Hindu Kush runs for about eight hundred kilometres from the middle of Afghanistan towards northern Pakistan, with the wider indica homeland extending over to the western Himalaya on one side and the lowlands around the Central Asian interior to the other. Cannabis has been grown there over a very long time, chiefly for hashish, and selected year after generation by people who needed resin above anything else: something that could be rubbed or pressed off a plant that would have ripened before the autumn snow.
That is a separate history from the one that produced the tropical sativas, where daylength hardly vary and the plant was free to grow for half a year. Everything that comes below is the outcome of a handful of conditions about the terrain: it is high, it is dry, the growing season is short, and its nights go cold early. The order in which they are discussed below hardly matter; a plant meets all of them at once.
Anthocyanin and the Autumn
High-valley nights drop below ten degrees long before the days follow, and many indica populations react to that chill by making anthocyanin, the same compound that colours autumn leaves purple. In the plant it shows as purple through the calyxes, fan leaves and occasionally the stem, which it offers little for the grower except look striking.
A point worth taking from the colour is a matter of lineage, rather than cosmetic. The tendency to colour is carried from particular cold-valley populations, and a strain that colours every time with a cool last two weeks has that ancestry regardless of what the name says. Lines marketed as “purple” that only turn under extreme cold, or not at all, usually have the colour in only the name and nothing of it not in the genes. Chilling the room in the final weeks brings the colour out where it exists and achieves nothing where it does not; it also slows the finish, so it is a bargain and not a free trick.
Built for a Desert Autumn
The old homeland is dry: low humidity, intense sun, rare rain through the late summer. A plant there has two problems that its resin solves at once. It needs to shield its reproductive tissue from ultraviolet light, and it must keep water inside the bud over weeks of dry wind. A heavy coat of trichomes do both: the resin heads block UV and their coating reduces moisture loss. Farmers for hashish on top of that drove the trait further, because resin was the product.
Dense bud form belongs with the same cause: a closely clustered bud loses less water than an airy one in dry air. Inside a tent those two qualities come together, and only one of them is unconditionally an advantage. The resin is. The density becomes a risk the moment the air is humid: a bud built to retain water in a desert retains it equally as well in a damp tent, and bud rot spreads through a hard indica cola more quickly than through any flower the equator has ever made. The quality that sells the seed is the same trait that needs a dehumidifier in the last three weeks.
The Low Frame
A good deal of the traditional growing land sits from a thousand five hundred and three metres. At that height the air is thin, the ultraviolet load is heavy, the wind is relentless and every centimetre of stem above the ground takes resources the plant can ill spare. A tall plant in that terrain loses faster, snaps sooner and gets nothing for the extra height, since there is no canopy it needs to clear.
The population which persisted is low: tight internodes, a single thick main stem, side branches kept close, frequently broader than it is tall. In a tent that translates directly: a pure indica seed gains perhaps half its height again in flower whereas a sativa doubles, fits beneath a light with a modest distance and rarely requires training at all. Growers short on little height choose indica for this reason, and it is the mountain, not the breeder, that they are thanking.
The Fat Leaf
An indica fan leaf is broad, thick and a deep green, and only a few broad fingers where a sativa fan leaf carries many thin ones. Both things in the climate favour the broad shape. Thin air and hard sun put an heavy photon load per square centimetre, so a wide leaf catches plenty and does not need a lot of area; a big thin leaf would just scorch. And constant wind shreds fine leaves, while a stout, short-petioled leaf stays put.
The deep colour is chlorophyll loaded thickly in a heavy leaf, and part of the same answer. To the tent the features count in one everyday respect: a broad-leafed indica canopy blocks light from all growth below the top layer much more thoroughly than a sativa’s, so the lower flowers of an unmanaged indica finish in small and loose. People that remove a few fan leaves in mid-flower are undoing, carefully, what the range put there over many thousands of years.
The Short Season: Why It Flowers Fast
At two thousand metres the growing season is short, and the autumn arrives quickly and comes hard. A plant that needed fourteen weeks to ripen after the days started to draw in did not make seed on such terrain, so the genes left the population. What stayed responds sharply to the first shortening days and ripens in about seven to nine weeks from the signal.
In a tent that response is the single most frequently valued indica trait. Flip to twelve hours and the plant commits immediately, stretches over a couple of weeks and stacks flower over the rest of a short run. The fastest strains at Kush Indica Seeds finish at about 7 weeks after the switch, which allows as many as five or six harvests a year from one space whereas a long sativa allows two. That difference is no efficiency on the breeder’s part; it is the first snow encoded into the plant’s own clock.
Reading the Place Names
Most indica seed labels carry the names of places or derive from one, and the names are far more useful than most buyers realise. “Afghani” generally means stock out of the Mazar-i-Sharif of Afghanistan, which is the classic squat, resinous, fast-finishing type. “Hindu Kush” in a name points to the high range itself and frequently to stock taken on the Pakistani side. “Chitral” and “Mazar” name specific valleys that have their own local forms, the first frequently purpling and the second large and slower for an indica. Kush Indica Seeds lists the collection area on every line whenever it is documented, which makes the name from a flavour to a fact the grower can plan around.
Almost all indica seed on sale are hybrid stock many generations from the original collection, bred for consistency and not for the variation of a pure landrace carries; a buyer who wants the population itself needs to look for lines described as unselected reproductions and accept the variation which arrive with the label.
Where the Adaptations Turn Against You
Each adaptation described above was an solution to a pressure which a tent no longer present, and a trait that has lost its pressure behaves either of two ways: it becomes a cost-free advantage or it becomes a cost. The fast finish and the low stature are advantages, because no condition in a tent punishes a plant for them. The density and the heavy canopy become costs, because the dry air that made sense of them is gone and the still atmosphere of a closed room has exactly the opposite influence.
This is why an indica grow succeeds or goes wrong on a single factor far more than on any other: humidity during the last three weeks. A person that keeps it down is rewarded with the dense, resinous, early harvest the mountain bred; one who does not is punished with mould inside the best colas, where the the plant was trying the plant to keep water in. Indoors, the mountain is to be rebuilt for the final fortnight: cool, dry, moving air. All else about growing indica is easy exactly because the plant was selected to survive somewhere much harder.
The Drift of a Word
The word that lent the range its name has since travelled a long way from it than almost any other in cannabis. “Kush” in a current seed listing can mean an true Hindu Kush reproduction, a West Coast hybrid with one Afghan ancestor, or a line called Kush since the seller liked the sound of it. A OG Kush family, and this accounts for most of the use of the word today, is probably as much sativa-influenced than many of the plants it borrows the name from, while its stretch, flowering time and leaf show as.
The practical reading is the same one which holds throughout this article: ignore the word and go back to the terrain. A listing that states an modest stretch, a flowering time under nine weeks, a dense bud and a wide leaf is selling a mountain plant whatever it is called; one that gives a lanky habit, eleven weeks and open flowers is selling a plant from else with a mountain name. The seed remembers the place it was shaped from; the name often does not.