Unlike any other grape harvest, the much-anticipated ice wine harvest usually takes place in the dark of the night, when at last temperatures fall to targeted levels and mature grapes freeze on vines.

Co-existing with frozen water crystals inside grape skins, are the ripe sugars, acids and concentrated flavors characteristic of ice wines.

However, there are some problems in ice grape wine production as follows: unqualified raw materials, raw materials by artificial freezing, addition of sugar, and dilution by grape fruitade etc.