Every trait that moves an indica seed has been bred there by a range of mountains. The squat frame, the fast flowering, the dense resinous flowers, the broad blue-green leaf, the colour that comes in when the nights go cold: not one of them is an invention. They are the answers a plant found over many thousands of years to a specific set of pressures, at high altitude, in a short dry summer, on the slopes of the Hindu Kush and the mountains around it. Modern breeding carried that answer off the mountain and polished it, yet the shape of the plant is still 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 account itself applies for any genuine indica from any shop catalogue. Reading the terrain is the quickest way to understand the pack.
A Dry Corner of Central Asia
The Hindu Kush stretches for about eight hundred kilometres out of central Afghanistan towards northern Pakistan, with the broader indica homeland extending across into the western Himalaya on one side and the deserts around the Central Asian interior on the other. The plant has been grown there over a very long time, mainly for hashish, and selected generation by generation by farmers who wanted a plant rather than any other quality else: something that could be sieved and sieved from a plant that would have finished ahead of the first frost.
That is a separate history to the one that produced the equatorial sativas, where daylength barely change and the plant was free to grow for half a year. All that follows is a outcome of a handful of facts about the terrain: it is high, it is arid, the growing season is short, and its nights go cold early. The order in which they are discussed here does not matter; a plant meets every one of them in the same season.
Resin as Sunscreen and Sealant
The traditional zone is arid: low humidity, hard sun, little rain through the flowering season. A plant there has two problems which resin answers together. It needs to protect its flowering parts from UV light, and it needs to hold water in the bud through weeks of dry wind. Trichomes do both: their heads block UV and the coating reduces moisture loss. Selection for hashish on top of that pushed the trait further, since resin was always the product.
Dense bud form belongs with the same story: a tightly clustered bud gives up less water than an open one in dry air. In a tent these two qualities arrive as a pair, and just one of them is always an advantage. The resin is. The density becomes a liability the instant the air is damp: a bud shaped to retain water in a desert holds it just as well in a wet tent, and bud rot moves in a dense indica cola faster than in anything an equator ever made. The trait that sells the seed is the one that needs a dehumidifier during the last three weeks.
Finishing Before the Frost
At two thousand metres the frost-free season is brief, and the autumn comes early and decisively. A plant that needed fourteen weeks to finish from the days started to shorten did not make seed on such terrain, so its genes dropped out of the population. What stayed reacts sharply to shortening days and ripens in about seven to nine weeks after that signal.
In a tent that reflex is the one most frequently valued indica trait. Flip to twelve hours and the plant moves immediately, grows for a couple of weeks and fills flower for the rest of a brief run. The quickest strains at Kush Indica Seeds finish at about 7 weeks after the switch, which permits as many as five or six cycles a year out of one room where a long sativa allows two. This difference is not cleverness on the breeder’s part; it is the first snow written into the plant’s calendar.
Leaves for a Thin Atmosphere
The indica leaf is broad, thick and dark, and few wide fingers whereas a sativa fan leaf has many thin ones. Two things about the terrain select for the broad form. Thin air and intense sun mean a high light load per square centimetre, so a broad leaf gathers plenty and does not need needing much surface; a big thin leaf would simply scorch. And steady wind tears thin foliage, whereas a stout, short-petioled leaf stays put.
The dark colour is chlorophyll packed thickly into a thick leaf, which is one part of the same adaptation. For the tent these features matter in a single everyday respect: a dense indica canopy blocks light from everything beneath the top layer far more thoroughly than a sativa’s, which means lower flowers on an unmanaged indica come in small and weak. Growers that strip a few few fan leaves in week three are undoing, carefully, what the mountain did over thousands of years.
Cold Nights: Why Some Go Purple
High-valley nights drop under ten degrees weeks before the days do, and many indica populations respond to that chill by producing anthocyanin, the same compound that colours autumn leaf purple. In the plant it appears as purple through the calyxes, fan leaves and occasionally the stem, which it offers little for the grower except look beautiful.
The point worth taking from the colour is genetic, not decorative. The capacity to colour is inherited from particular cold-valley populations, and a strain that colours reliably in a cold last fortnight has that ancestry whatever the name says. Lines marketed as «purple» that only turn under extreme cold, or not really, usually have a colour in only the name and in the plant. Chilling the room during the last weeks brings the colour forward if it is present and achieves nothing at all where it does not; it also checks ripening, so it is a trade and not a free effect.
Height Is a Cost at Two Thousand Metres
Much of the old growing zone lies between a thousand five hundred and three thousand metres. At that height the air is thin, the ultraviolet load is intense, the wind is relentless and every centimetre of stem over the ground costs resources the plant cannot afford. A tall plant in that ground dries out more, breaks more and gets nothing for its height, because there is no canopy to outgrow.
The plant which survived is compact: short internodes, a single thick central stem, side branches kept close, frequently wider than it is tall. In a tent that carries over straight: a pure indica line stretches maybe half its height over in flower whereas a sativa doubles, sits under a light with a modest modest distance and rarely needs training down. Growers short on limited height buy indica for this reason, and it is the mountain, not the breeder, that those growers are relying on.
Reading the Place Names
Most indica seed names are the names of names or descend from them, and the names are far more informative than they realise. «Afghani» generally means stock out of the Mazar-i-Sharif of Afghanistan, which is a classic short, hash-plant, early-finishing form. «Hindu Kush» on a name points to the central mountains itself and frequently to stock taken on the Pakistani side. «Chitral» and «Mazar» name specific valleys that have their own recognisable types, the former frequently purpling and the latter heavy and slower for an indica. Kush Indica Seeds gives the origin region on each line where it is known, which turns the name a brand into a fact the grower can use.
Most indica packs on sale are hybrid material several generations removed from the valley, selected for consistency and not to preserve the variation a pure landrace carries; a buyer that is after the population itself has to shop for lines described as pure reproductions and expect the variation that come with the label.
What Changes in a Tent
Each adaptation discussed above was an solution to the condition which a tent no longer present, and any trait that has lost its problem behaves one of two things: it becomes a free bonus or it becomes a cost. The speed and the short frame are advantages, because nothing in a tent penalises them. The density and the heavy canopy become hazards, because the arid air that justified them is absent and the damp air of a closed room does precisely the opposite effect.
This is why the indica cycle goes well or goes wrong on a single variable more than any other: humidity during the last three weeks. A person who keeps it down is rewarded with the dense, resinous, early flower the mountain bred; one that lets it rise is punished with mould inside the thickest colas, where the the mountain had trying hardest to hold water in. In a room, the mountain has to be reconstructed for the last fortnight: cool, dry, with moving air. Everything else about growing indica is easy exactly because the plant was selected for a place hard.
What «Kush» Means Now
The word that lent the mountains its name has travelled a long way from it than almost any other in cannabis. «Kush» on a current pack listing can mean an true Hindu Kush reproduction, a West Coast hybrid carrying one Afghan grandparent, or a strain called Kush since the seller thought the sound would sell. The OG Kush line, which dominates the appearances of the word today, is most likely more sativa-influenced than many of the plants it borrows the word from, while its growth habit, finishing time and leaf shape say as much.
A practical rule is the one that applies across this article: ignore the word and go back to the terrain. A listing which gives an modest stretch, a finishing time under nine weeks, a hard flower and a broad leaf is describing a mountain plant whatever it is called; one that states a tall habit, eleven weeks and airy buds is selling a plant from else with a mountain name. The seed carries the place it was shaped by; the name often does not.
