Thumbergia grandiflora  inchesAugusta inches vine. This is the largest of all the blue sky vines with blossoms up to 3 inches across.Sometimes called Clock Vine, Bengal Trumpet Vine or Indian Sky Vine, this has been referred to as  inchesmost beautiful vine in the world inches. In spring this semi-evergreen vine grows up to 60 feet and is covered with beautiful 3 inches wide clear blue flowers that are cuplike funnels with either pale yellow or cream stripes down the center. This fast growing vine can reach the top of a large fence in a season. Hardy in zones 8a-11, and root hardy to 20 degrees, but will freeze back at 25 degrees. Requirements are sun to part shade and does not like to have its roots standing in water. The soft leaves are a medium green of about 3 inches with toothed edges.
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