Selenicereus grandiflorus is a cactus species originating from the Antilles, Mexico and Central America. The species is commonly referred to as queen of the night, night-blooming cereus (though these two terms are also used for other species), large-flowered cactus, sweet-scented cactus or vanilla cactus. The true species is extremely rare in cultivation. Most of the plants under this name belong to other species or hybrids. It is often confused with the genus Epiphyllum.
Queen of the night has good resistance to disease and tolerates regular care without becoming ill easily. It can, however, be vulnerable to mealybugs; these pests may cause some damage but are usually not a serious threat. Regarding care needs, Queen of the night is drought-tolerant and does not require frequent watering. It can withstand long periods without water and needs little fertilizer. But it is highly prone to root rot if light levels are poor and it is overwatered. Overall, Queen of the night is appropriate for people who want to spend less time on plant care, though it is important to know and meet its basic needs. It is especially suited to those who are often away for extended periods and might forget to water their plants regularly.
How to keep Selenicereus Grandiflorus.
Light
Originating in arid areas, Queen of the Night prospers in full sun, its native habitat marked by strong sunlight and very little shade. It can also tolerate partial sun, providing some adaptability in its growth.
Water
The Queen of the Night is drought-tolerant and only needs thorough watering when the soil is completely dry. It's important to avoid any water accumulation. During the growing season, water the plant once or twice a week, and reduce watering in the winter. Use rainwater or distilled water to prevent soil compaction, which can be caused by tap water.
Humidity
This plant prefers dry conditions, so don't mist it. However, watering it less often can also thrive in higher humidity.
Temperature
Queen of the night prefers warm conditions and needs higher temperatures during the growing season to support growth and metabolic processes. It does best with plenty of sunlight, suitable moisture levels, and good air circulation. However, it is vulnerable to harm from very low temperatures and from excessive watering. It is important to maintain a balance and to avoid both excessively high heat and overly dry conditions.
Fertilizer
For Queen of the night, light applications of fertilizer once or twice a year during the growing season are sufficient. Avoid fertilizing in winter and summer when it is dormant. Reduce fertilizer for repotted plants and delay fertilizing for a couple of months after repotting. Applying fertilizer supports healthy growth and encourages blooms.
Pruning
The "Queen of the Night" plant is known for its large, fragrant blooms. To keep it healthy and thriving, it requires careful pruning from early to late winter. When pruning, focus on removing dead stems and thinning out overly crowded areas to improve air circulation. Be careful not to prune too heavily, as this can hinder blooming. Regular, gentle pruning encourages healthier growth and more abundant flowering. Additionally, handle the plant with care, as it has spiny stems.
Pot & Repot
Repot the Queen of the Night in spring or summer, choosing a pot just slightly larger than the current one that has good drainage. Use a sandy or gritty cactus mix that drains well. Handle the plant carefully to avoid its spines. Let the cactus dry out before repotting to help prevent root rot. After repotting, wait about a week before watering so the roots can heal.
Botanical profile.
- Plant Type
- Shrub
- Life Cycle
- Perennial
- Genus
- Selenicereus
- Family
- Cactaceae
- Hardiness Zone
- 10-11
- Mature Height
- 20 cm
- Mature Spread
- 15 cm
- Leaf Color
- Green
- Leaf Type
- Evergreen
- Flower Color
- White
- Flower Size
- 15.24 cm to 30.48 cm
- Bloom Time
- Summer, Early fall
- Planting Time
- Spring
- Harvest Time
- Late summer, Fall
- Native Area
- Tropical South America
Other names.
