Daylength. The plant is daylength neutral for stem- and root-tuber formation, at least for some clones.
Rainfall. The annual foliage and perennial underground stems make yacon adaptable to seasonal cycles of drought or cold.
Altitude. Generally between 900–2,750 m in the Andes, but it has been grown at sea level in New Zealand and the United States and reported at elevations up to 3,500 m in Ecuador.
Low Temperature. Although foliage is damaged or killed by frost, apparently the underground tissues are not affected unless frozen.
High Temperature. Tolerant of a wide range of temperatures.
Soil Type. Although it grows in a wide range of soil conditions, yacon does best in well-cultivated, rich, well-drained soil.
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Lost Crops of the Incas: Little-Known Plants of the Andes with Promise for Worldwide Cultivation . Washington, DC: The National Academies Press,
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