Clock Vine Fast Facts
image by twoblueday/Flickr
Clock vine, also called sky vine, is a tropical vine from India. Large blue to purple flowers bloom from spring throughout the summer.
The flowers of clock vine are similar to those of morning glory, but larger--as much as 3 inches across. The blooms range from light blue to light purple. Elongated leathery heart-shaped leaves form a lush background for the flowers. Clock vine grows vigorously.
Train clock vine along a fence, on a trellis or over a pergola. Allow it to ramble around and through taller plants. Where the ground freezes, grow clock vine as a houseplant.
Clock vine is hardy in Zones 8 to 11. It is evergreen in frost free areas. The top of the vine will be killed by a freeze, but the plant will return in the spring. Grow clock vine in rich organic soil and keep it moderately moist. Where summers are hot, plant clock vine where it will receive afternoon shade. Prune clock vine regularly to maintain the desired size. Old stems may lose their vigor and need to be removed.
About this Author
Melody Lee began working as a reporter and copywriter for the "Jasper News" in 2004 and was promoted to editor in 2005. She also edits magazine articles and books. Lee holds a degree in landscape design, is a Florida Master Gardener, and has more than 25 years of gardening experience.