Zulu Giant
Stapelia gigantea
Stapelia gigantea, commonly known as the Zulu Giant, is a striking succulent native to South Africa. Renowned for its large, star-shaped flowers and unique appearance, it is a favorite among succulent enthusiasts for its low maintenance and impressive blooms.
Everything it needs
9 essentials at a glance
Watering
Water the Stapelia gigantea thoroughly when the top 2 inches of soil are dry.
During the growing season (spring and summer), water every 2-3 weeks, reducing to once a month in fall and winter. Signs of over-watering include yellowing leaves and mushy stems, while under-watering may cause shriveling and drooping.
Light
Stapelia gigantea thrives in bright, indirect light but can tolerate some direct sunlight.
Ideally, it should receive 6-8 hours of light daily. Avoid placing it in full shade, as this can lead to leggy growth and reduced flowering.
Soil
A well-draining cactus or succulent mix is ideal, with a pH range of 6.0 to 7.0.
Ensure the pot has drainage holes to prevent water accumulation, which can lead to root rot. You can also mix regular potting soil with sand or perlite to enhance drainage.
Humidity
This plant prefers low to moderate humidity levels, ideally around 30-50%.
To increase humidity, you can mist the plant occasionally or place a humidity tray nearby. Signs of low humidity stress include browning leaf tips and slow growth.
Temperature
Stapelia gigantea thrives in temperatures between 65-80°F (18-27°C) and is hardy in zones 10-11.
It can tolerate brief periods of cooler temperatures down to 50°F (10°C) but should be protected from frost.
Fertilizing
Use a balanced, diluted fertilizer with an NPK ratio of 10-10-10 during the growing season, every 4-6 weeks.
In fall and winter, refrain from fertilizing. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Prune in late winter or early spring to remove any dead or damaged stems.
Use clean, sharp scissors or pruning shears to make clean cuts. Deadheading spent flowers can encourage more blooms and improve the plant's appearance.
Repotting
Repot every 2-3 years or when the plant outgrows its pot.
Signs it needs repotting include roots growing out of the drainage holes or stunted growth. Choose a pot 1-2 inches larger in diameter, and follow the same soil guidelines as above.
Propagation
Propagation can be done through stem cuttings.
Take a healthy stem cutting, allow it to dry and callous for 1-2 days, then plant it in a well-draining soil mix. Water sparingly until roots develop, which usually takes a few weeks. The best time for propagation is in spring or early summer.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or poor drainage.
How to fix it
Ensure the pot has drainage holes and allow the soil to dry out between waterings.
Shriveling stems
Why it happens
Under-watering or low humidity.
How to fix it
Increase watering frequency and consider misting the plant to improve humidity.
Leggy growth
Why it happens
Insufficient light.
How to fix it
Move the plant to a brighter location where it can receive more indirect sunlight.
Root rot
Why it happens
Excess moisture in the soil.
How to fix it
Remove the plant from its pot, trim away affected roots, and repot in fresh, dry soil.
Pest infestation (mealybugs)
Why it happens
High humidity and poor air circulation.
How to fix it
Treat with insecticidal soap or neem oil, and improve air circulation around the plant.
Care through the year
Spring
In spring, resume regular watering and fertilizing as the plant enters its growing season. Check for pests and prune any dead stems.
Summer
During summer, ensure the plant receives adequate light and water every 2-3 weeks. Monitor for pests and maintain humidity levels.
Fall
In fall, reduce watering frequency to once a month as the plant prepares for dormancy. Stop fertilizing and check for any signs of stress.
Winter
In winter, keep the plant in a warm location and avoid over-watering. It may go dormant, so minimal care is needed during this time.
Toxicity & Safety
Stapelia gigantea is non-toxic to pets and children. However, ingestion may cause mild gastrointestinal upset. Always monitor pets and children around plants.
Good to know
Why are my Stapelia gigantea leaves turning yellow?
Yellow leaves on your Stapelia gigantea are often a sign of over-watering. Make sure to allow the top 2 inches of soil to dry out before watering again.
How often should I water my Zulu Giant?
Water your Stapelia gigantea every 2-3 weeks during the growing season and once a month in fall and winter, ensuring the soil dries out between waterings.
What light conditions are best for Stapelia gigantea?
Stapelia gigantea prefers bright, indirect light but can tolerate some direct sunlight. Aim for 6-8 hours of light daily for optimal growth.
How do I propagate Stapelia gigantea?
Propagate through stem cuttings by allowing a healthy cutting to dry and callous for 1-2 days before planting in well-draining soil. Water sparingly until roots develop.
What should I do if my Stapelia gigantea is not blooming?
If your Zulu Giant is not blooming, it may be due to insufficient light or nutrients. Ensure it receives enough indirect sunlight and consider fertilizing during the growing season.
Can Stapelia gigantea survive in low humidity?
Yes, Stapelia gigantea can survive in low humidity, but it thrives best in moderate humidity levels. Misting occasionally can help improve its growth.
When is the best time to repot Stapelia gigantea?
The best time to repot Stapelia gigantea is every 2-3 years or when it outgrows its pot, typically in late winter or early spring.
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