Lepidium meyenii Seeds | Maca Root
LATIN NAME: Lepidium meyenii
COMMON NAME: Maca
Plant Profile
The plant is a low rosette-former, with a tuft of deeply lobed, pinnatifid grey-green leaves held flat to the ground and a short, thickened tap-root beneath. In its brief bright summer it bolts a slender raceme of small four-petalled white flowers, the classic Brassicaceae bloom, and these set the tiny flattened pods, each holding a few minute seeds. The seeds are so small that a pinch fills a bed, and they carry the same peppery scent as the garden cress they are related to, which is the family tell you can smell at the crushed leaf.
What makes maca a crop is the swelling of the hypocotyl into the rounded storage root, the same trick a turnip or a radish pulls but tuned to altitude. The leaf stays a modest rosette while the underground part does the work, and the root only sizes up after the first cold season, which is why a maca bed is a patient affair. The colour of the root is set by the landrace you sow, not by the soil.
The plant is named for Friedrich Meyen, the German naturalist who collected in Peru in the 1830s and sent the material that let Walpers describe it, and the species has since bounced between Lepidium and the old genus Meyenia as botanists argued where the pepperworts belong. The modern view keeps it in Lepidium alongside garden cress and the pepperwort, which is honest: crush a leaf and the mustard-oil smell places it at once in the cabbage family.
The close comparison is Lepidium sativum, garden cress, which shares the peppery leaf and the tiny pod but is grown for the sprout, not the root. Maca is the altitude-adapted storage form, and the pepperwort kin are the leafy or salad sorts. If you can grow cress on a windowsill you already understand maca’s chemistry; what you cannot replicate at sea level is the cold, thin-air regime that makes the root worth eating, which is why lowland maca is often a paler imitation.
Andean growers maintain distinct landraces by colour, cream, red and black, and select each for size and local use, a quiet breeding programme carried in the seed rather than the lab. The black and red forms are the smaller, more prized roots, while the cream is the larger and more common, and the differences are real enough that a grower picks a landrace the way a winegrower picks a clone. Seed saved from a mixed bed drifts, so keep your colours separate if you care which you grow.
Science & Biotechnology
The root’s interest lies in its glucosinolates, the mustard-oil glucosides of the cabbage family, and in a pair of compounds almost unique to maca, the macamides and the macaenes, fatty-acid-derived molecules that research has chased for their unusual biology. The peppery bite of the leaf is the glucosinolate at work, the same chemistry that puts the heat in cress and mustard. The root is milder than the leaf but carries the same family signature in a softer dose.
Uses & Benefits
At 3,800 metres on the Junin plateau of Peru, where frost and thin soil defeat the potato and most crops simply refuse, maca’s low rosette of grey-green leaves survives and below ground swells a fleshy root that local people have dug and eaten for centuries. That ability to make a usable food where almost nothing else will is the whole reason maca is famous, and it is the single fact worth leading with: this is a brassica that turned the world’s worst farmland into a pantry. The root is rounded, sometimes pear-shaped or branched, and its colour runs through cream, red and near-black landraces, each with its own local reputation.
The wild home is the puna, the high grassland of the Junin plateau and neighbouring ranges, where the growing season is short, the nights are freezing and the soil is thin and often alkaline. Maca is one of the few crops that calls this home, and traditional practice rotates it with a long fallow so the ground recovers, because the root mines the poor soil hard. Recreating that means giving the plant cold, bright light and a lime-free but mineral soil rather than a rich wet bed.
Use the root in several ways. Dry it and mill it into a flour for breads and porridge, the traditional staple; roast the dried root until sweet and eat it as a treat with a little honey; or cook the fresh root as a vegetable where the climate allows a root to form. The leaf and the sprouted seed add a peppery note to a salad, much like cress. Pair the roasted root with cinnamon or a little lime to round its earthy edge.
The classic preparation is to dry the root, then roast it until the sugars caramelise and the flavour turns sweet and nutty, after which a drizzle of honey and a pinch of cinnamon makes a simple high-altitude confection. The fresh root is more turnip-like and best cooked; the dried, roasted root is the concentrated form that travels, which is the one most people outside the Andes actually meet.
Growing from Seed
Sow in a gritty, lime-free mix of two parts coarse sand, one part loam and one part leaf mould, because the alpine root hates alkaline wet ground, and cover the minute seed with only a fine grit dust, because light helps the embryo break. Keep the tray cool and bright, never hot, and mist rather than water heavily so the dust cover is not washed away. The seedlings are tiny and slow, so sow thin and label your landrace.
Transplant when the seedling shows six true leaves, because the tap-root is fleshy and resents a late move, and set the young rosette into its own pocket at about twenty centimetres of space in the open, sunny bed. Thin to one plant per station, and transplant the liner once it has a firm root and a low rosette. Overwinter the bed under a cold frame if your frost is harder than the plant expects, since the root sizes up only after a true cold season.
Our Take
I treat maca as an altitude challenge and keep the bed cold and gritty; for a peppery-leaf relative try nasturtium as a cress stand-in, and for another leaf-and-root crop see moringa or borage.
Related Reading
If Maca appeals to you, these related plants are worth a look: