Yareta, or Azorella compacta, is a slow-growing cushion-forming plant native to the high Andes of South America.

Is Yareta really 3,000 years old?

Some older estimates suggested that exceptionally large Yareta plants could be around 3,000 years old. Modern research supports remarkable longevity but gives a more cautious picture of individual plant ages.

Yareta: The Ancient Plant of the Andes

Q: How fast does Yareta grow?

Yareta is an exceptionally slow-growing plant. Scientific research has estimated long-term growth rates of roughly 1.3 to 3.5 millimetres per year in a studied population.

High in the Andes of South America grows a plant that looks more like a green rock than an ordinary plant. Known as Yareta or Llareta, Azorella compacta forms dense, rounded cushions over the rocky ground of the high mountains. For generations, Yareta has attracted attention because of its extremely slow growth and remarkable longevity. Some descriptions have called it a 3,000-year-old plant, although scientific research gives us a more careful picture of just how old individual plants can become. Yareta survives in one of the harshest environments imaginable, where cold temperatures, intense sunlight, dry air, and limited water make life difficult for most plants.

Yareta plant growing among rocks in the high Andes

Yareta forms dense green cushions across the rugged high Andes.

What Is the Yareta Plant?

Yareta or llareta

Yareta, or llareta, is the common name generally used for Azorella compacta, a species belonging to the Apiaceae family. This is the same plant family that includes familiar plants such as carrots and parsley, although Yareta looks entirely different from them. According to the Royal Botanic Gardens, Kew, Azorella compacta is an accepted species native to southern Peru, Bolivia, northern Chile, and northwestern Argentina. Kew classifies it as a subshrub that primarily grows in subalpine or subarctic environments. The plant grows close to the ground and forms a compact cushion made up of many tightly packed shoots. From a distance, a large Yareta can resemble a moss-covered boulder.

Why Does Yareta Look Like a Green Rock?

The unusual shape closely connects to the environment in which the plant lives. Instead of growing upward like a tree, Yareta spreads outward and forms a dense cushion. Its compact growth helps it occupy the small spaces between rocks while reducing exposure to the cold, dry mountain air. Over many years, the plant can gradually become a surprisingly large mound.

First Image credit Miguel Vieira

Large green Yareta cushion plant in an Andean landscape

A mature Yareta spreads slowly across the rocky Andean terrain.

Image credit: Magnus von Koeller

Where Does Yareta Grow?

Yareta is a plant of the high Andes, where the landscape can be dry, rocky, and almost treeless. Its natural range extends through Peru, Bolivia, Chile, and northwestern Argentina. Scientific research on Azorella compacta has examined plants growing on the Misti volcano near Arequipa, Peru, at elevations of roughly 4,100 to 5,000 metres. At these elevations, conditions are very different from those found in lowland forests. Temperatures can drop sharply, rainfall is limited in many areas, and strong sunlight reaches the ground.

Yet Yareta has evolved to survive there.

How Fast Does Yareta Grow?

One of the most fascinating things about the Yareta plant is its incredibly slow growth. Older descriptions sometimes state that Yareta grows only about one millimetre each year. Modern scientific research suggests a somewhat faster, but still extremely slow, long-term rate. A 2021 study published in the Journal of Arid Environments estimated a long-term growth rate of approximately 1.3 to 3.5 millimetres per year for an Azorella compacta studied on Misti volcano. That may sound insignificant, but over centuries, the difference becomes substantial. This slow growth is one reason Yareta has become interesting not only to botanists but also to scientists studying the history of the Andes.

Azorella compacta growing at high altitude in South America

Azorella compacta, commonly known as Yareta or Llareta, thrives in harsh mountain conditions.

Image credit: Lon&Queta

Can Yareta Really Be 3,000 Years Old?

This area is where the popular story needs some caution. Yareta is certainly capable of living for a very long time, but the often-repeated 3,000-year-old Yareta claim should not be treated as a firmly established age for every large plant. The 2021 scientific study used radiocarbon dating and growth modelling to investigate the age of a Yareta on the Misti volcano. The researchers estimated that the studied plant may have begun growing sometime between 1462 and 1830 CE.
That is still an extraordinary lifespan, but it is not evidence that the particular specimen was 3,000 years old. So, rather than saying every giant Yareta is 3,000 years old, it is more accurate to describe Yareta as an ancient, exceptionally slow-growing Andean plant whose individual cushions can survive for centuries.

How Does Yareta Survive the High Andes?

Life at extreme altitude places enormous pressure on plants. One of the odd things about Yareta is how compact it is. The dense cushion keeps the plant close to the ground and enables growth across rocky terrain. Yareta grows into a low, dense structure instead of producing a tall stem exposed to the wind. The environment matters too. YareChile, traditionally used for water, may be scarce, and temperatures can fluctuate dramatically. Its survival is therefore a remarkable example of how plants can adapt to challenging mountain environments.

Dense Yareta growth forming a rounded cushion on rocky ground

The rounded form of Yareta develops through extremely slow growth over many years.

Image credit: Lon&Queta

Why Is Yareta Important?

Yareta is more than an unusual-looking plant. It grows very slowly and can trap older plant material in its cushion. This means that scientists can use it to study environmental and geological history. The 2021 study found that Azorella compacta has potential as a geochronological resource, particularly in parts of the Andes where trees and conventional tree-ring dating are unavailable. This makes the plant valuable for research into geological surfaces, volcanic activity, archaeological sites, and other events that occurred during the past several centuries.

Is Yareta an Endangered Plant?

The current conservation information is more reassuring than some older internet descriptions suggest. Kew's Plants of the World Online currently lists Azorella compacta as Least Concern (LC) according to the IUCN Red List. That does not mean the plant and its habitat should be ignored. High-Andean ecosystems are fragile, and extremely slow-growing organisms can be particularly sensitive to disturbance because recovery can take a very long time.

Yareta growing in the cold high-altitude Andes of South America

This unusual cushion plant is one of the distinctive species of the high Andes.

Image credit: Lon&Queta

Yareta: An Ancient Survivor of the Andes

Yareta is one of those plants that becomes more fascinating the more closely you examine it. Its strange cushion-like shape, extreme habitat, and remarkably slow growth have made it one of the most memorable plants of the Andes. The popular description of Yareta as a 3,000-year-old plant is intriguing, but modern research suggests that its true story is more complicated. What science clearly demonstrates is that Azorella compacta can live for centuries and grow at an exceptionally slow rate. That level of longevity is remarkable for a plant living high among the mountains of Peru, Bolivia, Chile, and Argentina. Yareta may look like a simple green mound on the Andean landscape, but beneath that compact surface is a plant adapted to survive one of the world's most demanding environments.