Every trait that moves an indica seed was put there by a range of mountains. The short stature, the fast flowering, the dense resinous buds, the broad dark 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 over thousands of years to a particular combination of pressures, in great altitude, in a short dry, cold summer, across the valleys of the Hindu Kush and the ranges around it. Breeders carried that answer down the mountain and polished it, but the logic of the plant is to this day the logic of the terrain. The examples referred to in what follows are drawn 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 genuine indica from any seed catalogue. Knowing the terrain turns out to be the most reliable way to understand the pack.
A Dry Corner of Central Asia
The Hindu Kush runs roughly eight hundred kilometres from the middle of Afghanistan towards northern Pakistan, with the wider indica homeland spilling over into the western Himalaya on one side and the lowlands of the Central Asian plateau on the other. Cannabis has been grown there for centuries, mainly for hashish, and chosen year after generation by people who needed a plant above any other quality else: resin that could be sieved or pressed off a plant that had finished before the first snow.
That is a different selection from the one that shaped the tropical sativas, in which daylength barely vary and the plant was free to grow for most of a year. All that comes below is the outcome of four facts about the place: it is high, it is dry, its summer is short, and its nights go cold fast. The order that they are taken here hardly matter; a plant experiences every one of them in the same season.
Resin as Sunscreen and Sealant
The traditional zone is arid: thin humidity, hard sun, little rain through the late season. A plant in such a place has two problems which resin answers together. It needs to protect its flowering parts from ultraviolet light, and it must keep moisture inside the flower through weeks of dry wind. A heavy coat of trichomes does both: the heads block the ultraviolet and their coating slows moisture loss. Selection for hashish then drove the trait even harder, since resin was the crop.
Dense bud structure belongs to the same cause: a closely packed bud gives up less water than an open one in arid air. In a tent those two traits come together, and just one of them is unconditionally welcome. The resin is. The density turns into a liability the moment the air is humid: a bud built to retain water in a desert retains it equally well in a wet room, and bud rot spreads through a dense indica cola more quickly than through any flower an equator ever produced. The quality that moves the seed is the one that calls for a dehumidifier during the last few weeks.
Cold Nights: Why Some Go Purple
High-valley nights fall under ten degrees long before the afternoons follow, and a good number of indica lines respond to the cold by producing anthocyanin, the same pigment that colours autumn leaf red. In the plant it appears as purple in the bracts, leaves and sometimes the stem, which it does nothing for the grower except look striking.
A thing to taking from it is a matter of lineage, rather than cosmetic. The capacity to turn is inherited from particular cold-valley populations, and a strain that purples reliably with a cold last two weeks has that ancestry whatever the name claims. Strains sold as «purple» that only turn with heavy cold, or not really, typically have a colour in the name and in the plant. Chilling the room in the last weeks draws the colour forward if it exists and achieves nothing at all if it is absent; it at the same time checks ripening, so it is a bargain and not a costless effect.
Seven Weeks Before the Snow
At two thousand metres the frost-free season is brief, and the autumn arrives quickly and comes decisively. A plant which needed fourteen weeks to ripen from the days began to draw in did not set seed on such ground, so its genes left the population. What stayed reacts fast to the first 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 quality. Flip to twelve hours and the plant commits immediately, grows for a couple of weeks and stacks flower over the rest of a short run. The quickest strains at Kush Indica Seeds finish in around 7 weeks from the flip, and that allows as many as five or six harvests a year from one space where a long sativa allows two. This speed is no efficiency on the breeder’s part; it is the first snow written into the plant’s own clock.
The Fat Leaf
The indica fan leaf is broad, thick and dark, with few wide fingers where a sativa leaf has many thin ones. Both pressures in the terrain select for the broad form. Thin air and intense sun mean an high light dose on each square centimetre, and a wide leaf catches enough without needing a lot of area; a large thin leaf would just scorch. And steady wind shreds thin foliage, whereas a thick, short-petioled leaf stays put.
The dark colour is pigment loaded thickly into a thick leaf, and one part of the same answer. For the grower the leaves matter in a single everyday way: a dense indica canopy shades all growth below the top layer much more thoroughly than a sativa’s, so lower flowers of an unmanaged indica come in small and weak. Growers who remove a large leaves in mid-flower are undoing, carefully, something the range put there over thousands of years.
The Low Frame
Much of the old growing zone lies from a thousand five hundred and three thousand thousand metres. At that height the air is thin, the ultraviolet exposure is intense, the wind is constant and each centimetre of stem above the ground costs water the plant cannot afford. A tall plant in such ground loses faster, snaps more and gains little for the extra height, since there is no canopy to outgrow.
The population which survived is compact: tight internodes, a single dense main stem, side branches held close, frequently wider than it is tall. In a tent that translates straight: a true indica line stretches perhaps half its height again through flower whereas a sativa doubles, fits beneath a lamp at a modest modest gap and seldom needs tying at all. Anyone short on little height choose indica for this reason, and it is the mountain, not the breeder, that they are thanking.
Reading the Place Names
The great majority of indica pack labels are place names or descend from one, and the names are more useful than they look. «Afghani» usually means a population out of the Mazar-i-Sharif of Afghanistan, and a classic short, hash-plant, early-finishing type. «Hindu Kush» in a listing refers to the high range itself and often to stock collected on the eastern side. «Chitral» and «Mazar» name specific valleys with their own local forms, the former frequently colouring and the second large and slower for an indica. Kush Indica Seeds gives the origin region on each pack whenever it is documented, which makes the name from a brand to a datum the grower can plan around.
Almost all indica seed on sale are hybrid stock many generations from the valley, selected for consistency rather than for the variation a true landrace carries; a buyer who is after the spread needs to look for lines described as pure landrace stock and expect the surprises that arrive with them.
Taking the Plant Off the Mountain
Each adaptation described above was an solution to a pressure that a tent no longer impose, and any trait without its pressure behaves one of two ways: it turns into a free bonus or it becomes a hazard. The speed and the low stature become advantages, because nothing in a tent punishes them. The density and the broad canopy become costs, since the arid air that made sense of them is absent and the still air of a closed room has exactly the reverse influence.
That is why an indica cycle goes well or goes wrong in one variable far more than on any other: humidity during the last three weeks. A person who holds it down is rewarded with the dense, frosted, early harvest the mountain built; one that lets it rise gets rot in the thickest colas, where exactly where the plant had arranged hardest to hold moisture in. In a room, the mountain is to be reconstructed for the last two weeks: cool, dry, with moving air. All else about growing indica is easy exactly because the plant was selected for somewhere much harder.
Kush on the Label
The word that gave the mountains its name has since moved further from it than any other in cannabis. «Kush» in a modern seed name may mean an unselected Hindu Kush reproduction, a West Coast hybrid with one Kush grandparent, or a strain called Kush because the seller thought the sound would sell. A OG Kush family, which accounts for most of the appearances of the word today, is most likely as much sativa-leaning than many of the stock it takes the word from, while its stretch, flowering time and leaf shape say as much.
A practical rule is the same one that applies across this article: ignore the word and go back to the terrain. A listing that gives a modest stretch, a finishing time below nine weeks, a dense bud and a wide leaf is selling a mountain plant whatever it is called; one that gives a tall habit, eleven weeks and airy flowers is describing something else wearing a borrowed name. The seed carries where it came by; the label often does not.
