They have large 4 to 6 inch fragrant, white or pink flowers on twining vines. The flowers open quickly in the evening and last through the night, remaining open until touched by the morning Sun. M oonflowers grow to a height of about 15 feet. The leaves are rather large which allows the plant to be used as an annual in a northern garden.
Propagation is usually by seed.
The seed should be nicked with a file and then soaked overnight before planting.