Calonyction aculeatum (Giant moonflower)

Calonyction aculeatum (Giant moonflower) opening a large white flower with five distinct folded lines

Botanical names: Calonyction aculeatum, Ipomoea alba

Common name: Giant moonflower

Family: Convolvulaceae

Origin: Tropical America

USDA Zone: 9-10

Plant form: Climbing or creeping vine

Sun exposure: Full sun or bright light indoor; semi-shade

Cold tolerance: Frost sensitive. Protect from freezing.

Watering: Regular; moderate

Flower color: White and off-white

Suitable for: Outdoors in the suitable USDA zone; small gardens, containers, and indoor growing

Fragrance: Fragrant; perfume plant

Wildlife: Attracts butterflies and hummingbirds

Invasive: Can spread quickly, needs control

When grown in their native climates, moonflowers (Calonyction aculeatum) prefer a full sun to semi-shade position and need regular water. In cooler regions, the vine should be grown in a container and placed in a warm, sheltered area of the garden. It needs to be watered regularly with moderate amount of water throughout its growing season. In winter, reduce watering and move the pot to a frost-free area.

Its trumpet-shaped, white or off-white flowers bloom in the evening and are very fragrant, thus it attracts various butterflies and hummingbirds. Be aware that this flower is considered invasive in some areas and its spread should be monitored carefully. It is best grown in USDA Zones 9-11.