A dramatic night-blooming cactus with fragrant, one-night blossoms. Best in bright light with excellent drainage; train on a trellis for show-stopping flowers.
Full Botanical Name: Selenicereus grandiflorus
Common Names: Queen of the Night, Night-Blooming Cereus
Country and/or Region of Origin: Caribbean, Mexico, Central America
Growing Conditions in Native Habitat: Dry tropical thickets/rocky habitats with high light and sporadic rains
Care Guide
Care Guide:
Light: Bright light; several hours of direct sun preferred
Ideal Room: Sunny conservatory/window with support
Feeding: Cactus feed monthly in spring–summer
Humidity: Low–average
Ideal Temperature: 18–30°C (65–86°F); protect from frost
Watering: Water thoroughly, then let soil dry; very light in winter
Pet/Child Safe: Common “night-blooming cereus” types like Hylocereus undatus are listed by the ASPCA as non-toxic to cats & dogs. Specific data for S. grandiflorus indicate it’s not known to be harmful to pets or humans; primary risk is mechanical injury from spines and mild GI upset if chewed. Precaution for all animals (including reptiles/amphibians, and humans): avoid chewing/ingestion and handle carefully. Sources: ASPCA (Night Blooming Cereus – Hylocereus), Gardenia plant profile.
Soil Type: Very free-draining cactus mix (add sand/pumice)
Propagation: Stem cuttings (callous before planting)
Eventual Height and Spread: Clambering stems to 2–4+ m with support
Growth Rate: Moderate–fast in bright heat
Pests and Treatment: Mealybugs/scale—treat with alcohol swabs/neem
Repotting: 2–3 yearly; step up pot size modestly
Pruning: Tip-prune to manage size and spur branching
