Moonflower Bud . Because my moonflower doesn’t come into bloom until the hours. And really want to see a rare moonflower bloom for just 12 hours, tune in to. South Englishtown Gazette More Moonflower from southenglishtown.blogspot.com Or, as in this case, the hours of darkness. The moonflower’s glorious blooms unfurl beneath the light of the moon from which it gets its name, and as the sun rises, the long white petals curl up and the bud closes, hiding its beautiful blossoms until the night comes again. Make sure to plant your moonflower vine in an area where they can climb upwards (towards the moon!).