Moonflowers are related to morning glories and are often planted among them. Moonflowers open their blossoms at sundown and close them at sunrise. Morning glories open their blossoms for a few hours beginning at sunrise. They are both vines and they complement each other quite well. They look alike too, except moonflowers are pure white. Be sure to plant vines of moonflowers near patios and other outdoor living areas so you can enjoy their flowers and subtle sweet fragrance during nighttime hours.
Choose a spot for your moonflowers that is in full to partial sun. They are one of the few flowers that like average to poor soils and will often grow and thrive where other plants struggle. Because they are vines, plant them against a fence or other support on which they can climb as they grow.
Loosen the soil by turning it over with a garden shovel. Rake it smooth.
Plant seeds of moonflowers directly in the garden where they are to grow. Plant them about ¼ to ½ inch deep and gently firm the soil over the seeds with your hand. Water with a watering can. They should germinate in about 7 to 10 days.
Thin the seedlings. When they are about two inches high, thin them so they stand 6- to 8-inches apart.
Apply a mulch around the base of the plants to help control weeds. Lay down a 2- to 4-inch layer of wood chips or shredded bark.