Snail Vine

Cochliasanthus caracalla

Fast-growing tropical vine with fragrant snail-shaped purple and cream flowers for arbors.

Sunlight Full Sun

Water Regular

USDA zones 9–11

Planning spacing 4 ft

Typical mature size 20 ft tall, 6 ft wide

Typical bloom Summer - fall

Snail Vine spacing and mature footprint

Space Snail Vine 4 ft apart, measured center to center (1.2 m).

The mature spread is about 6 ft (1.8 m), so plants set at that distance grow together into continuous cover.

Treat 4 ft as a planning baseline — cultivar and local growing conditions shift the final footprint.

Three plants set 4 ft apart, center to center; shaded circles show the 6 ft mature spread.