As the most deadly pest in the history of viticulture tore through most of the wine-making world causing widespread destruction to grape vines in the late 1800’s, how is it that the long nation of Chile has remained relatively unaffected to this day?
Continuing our focus on Chile for the month of March, we look at what makes Chile the world’s most suitable natural environment for growing wine grapes, how it benefited from its natural barriers and a benevolent Mediterranean climate, and why such a large proportion of Chilean wine reaching us today is bio-dynamic without the producer having to lift a finger.
In most parts of the world, the organic production of wine can be quite labour intensive and there’s a lot of thought that goes into making a vineyard bio-dynamic, and the final product organic for that matter. For some areas, it’s simply not viable to omit the use of industrial pesticides, such is the nature of the environment. So what makes Chile so different?
Climate
Chile’s climate is highly influenced by the cooling effect of the Pacific Ocean and the Humboldt Current that begins in the icy waters near Antarctica and flows up the western coast of South America. When the effect of the Humboldt’s cold current hits Chile’s northern coastline it produces clouds and fog, but little or no precipitation, which then contributes to making the Atacama Desert the driest on Earth.
Geography
The cool sea air is partially blocked by the Coastal Mountains, although it finds its way inland by following the course of the transversal river valleys. During the day, sea breezes carried by the cold Humboldt Current penetrate inland, and each night, cold air descends from the snow covered peaks of the Andes.
Chile’s geographic barriers - the Atacama Desert to the north, the Andes Mountains to the east, the Patagonian ice fields to the south, and the Pacific Ocean to the west - make it a veritable agricultural island. Together they help maintain healthy conditions and protect vineyards against pests and disease.
Soil & Terroir
With so much geographic variety, the Chilean landscape also offers a vast mosaic of terroirs and soil types. Soils are healthy, well-drained, and have a variety of origins (alluvial, colluvial, fluvial, etc.) and textures (loam, clay, sand, silt). Despite the relatively dry atmospheric conditions, abundant water for irrigation flows from the ice caps of the Andes Mountains that tower all along Chile’s eastern border.
Altitude
In recent years, more and more vineyards creep closer and higher to the peaks, where the sun is slow to appear over the eastern peaks and makes up for its late arrival with the intensity that comes with altitude. Currents of wind climb and descend over the course of the day to create a daily pendulum of temperatures that swings broadly between daytime highs and night time lows. This is just what rich red grapes, such as Cabernet Sauvignon, thrive on.
Not long, but wide
Curiously, it’s not the distance from the equator that plays the dominant role in the diversity of Chile’s grape growing exploits, but rather the proximity to the Pacific Ocean or the Andes Mountains. Chile has much greater diversity in soils and climates from east to west than from north to south.
Both Santa Alicia and Tabali farm very close to organic. Although not certified, Sierra Grande produces wine from organically grown grapes. 20% off all Chilean wines for the month of March (discounted at checkout).
Educational material courtesy of winesofchile.org