The moonflower is a vigorous twining vine that is very fast growing in really hot weather. It is a tender tropical perennial but is now seeing popular use as an annual vine in colder areas. This close relative of the morning glory has similar heart shaped leaves that are a rich green and 4-8 (10-20 cm) inches long. They provide a beautiful backdrop for the spectacular moonflowers. This vine also known as the evening glory as its buds open in late afternoon and last only until mornings light tran ...