California accounts for 90% of all wine produced in the United States. In fact, if California were its own country, it would rank 4th in the worlds largest wine-producing countries. In the 18th century, the Spanish planted California’s first vitis vinifera vines. More than 100 grape varieties are grown in California, and wine grapes are grown across the entire state. Because of its size, there is a huge range in climates and grapes, and therefore, wine varieties.