Santorini is home to a small but flourishing wine industry, based on the indigenous grape variety, Assyrtiko. Assyrtiko vines are extremely old, as they are resistant to phylloxera and have consequently not needed to be replaced during the great phylloxera epidemic of the early 20th century. They are adopted to their native habitat by being planted far apart and their principal source of moisture is dew. They are trained in the shape of baskets, with the grapes hanging inside to protect them from the winds. Also unique is the red, sweet and extremely strong Vinsanto.