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Ontario is Canada's largest wine region, where viticulture is strongly shaped by its cool climate and the influence of the Great Lakes. A long growing season and the moderating effect of the lakes allow grapes to retain acidity while reaching sufficient ripeness. The region produces dry white and red wines, sparkling wines and sweet wines.
The main wine regions of Ontario are Niagara Peninsula, Prince Edward County and Lake Erie North Shore. The largest concentration of wine production is in the Niagara Peninsula, which includes the Niagara Escarpment and Niagara-on-the-Lake subregions. Limestone, clay and gravel soils found across the region contribute different structural and mineral characteristics to the wines.
The most important grape varieties grown in Ontario include 'Riesling', 'Chardonnay', 'Pinot Noir' and 'Cabernet Franc'. The cool climate is particularly well suited to 'Riesling' and 'Chardonnay', which retain bright acidity and aromatic precision, while 'Pinot Noir' and 'Cabernet Franc' can achieve sufficient ripeness to produce structured yet fresh red wines.
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Niagara Peninsula benefits from the moderating influence of the Great Lakes. Lake Ontario reduces temperature fluctuations, while the Niagara Escarpment's topography and soils create favourable conditions for vineyards. The region is also home to some of Canada's most important sparkling wines.
Ontario is also renowned for Icewine, made from grapes that freeze naturally on the vine. 'Vidal' and 'Riesling' are the most commonly used varieties. Freezing concentrates the grape juice, resulting in wines with intense fruit character, high acidity and a long finish. The balance between sweetness and acidity is one of the defining qualities of a well-made Ontario Icewine.
The style of Ontario wines is shaped by cool climate, the influence of the Great Lakes and limestone-rich soils. The region produces wines defined not by excessive alcohol or heavy fruit, but by freshness, pronounced acidity and clear aromatic expression.
