Parodia lenninghausii
Parodia lenninghausiiUSDA | Grow Zone
10-11Outdoors all year in zones 10 to 11. Anywhere colder, keep it as a houseplant. Protect it below 40°F.
- Light
- Full sun, 6 hours daily
- Water
- When top 1-2 in is dry
- Humidity
- 30-50% preferred
- Temperature
- 70-100°F (21-38°C)
- Difficulty
- Beginner
- Growth
- Slow
- Mature size
- Up to 1-2 ft tall
Parodia lenninghausii, known as the Golden Barrel Cactus, is a striking succulent native to South America. Its round shape and vibrant yellow spines make it a popular choice for indoor and outdoor gardens, thriving in bright sunlight and well-drained soil.
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Ideal temperature
50-100°F is where it grows fastest. Below 40°F cold damage starts.
Spacing and harvest
- Mature size
- Up to 1-2 ft tall
- Plant apart
- 12-24 in
- Frost
- Half hardy: light frost only
Everything it needs
9 essentials at a glance
Watering
Parodia lenninghausii, commonly known as the Golden Barrel Cactus, requires infrequent watering.
Water thoroughly when the top 1-2 inches of soil are dry, typically every 2-4 weeks during the growing season (spring and summer). Reduce watering to once every 4-6 weeks in the fall and winter. Signs of over-watering include yellowing or mushy stems, while under-watering may cause the cactus to shrivel.
Light
This cactus thrives in full sun, requiring at least 6 hours of direct sunlight daily.
Ideal placement is near a south or west-facing window. While it can tolerate partial shade, too little light may lead to elongated growth and reduced flowering.
Soil
Parodia lenninghausii prefers a well-draining soil mix, ideally a cactus or succulent potting mix with a pH of 6.0 to 7.0.
Adding perlite or sand can enhance drainage. Ensure the pot has drainage holes to prevent water accumulation.
Humidity
This cactus prefers low humidity levels, ideally around 30-50%.
To increase humidity, you can place a humidity tray filled with water and pebbles near the plant, but avoid direct contact with the water. Signs of humidity stress include wrinkled or shriveled stems.
Temperature
The ideal temperature range for Parodia lenninghausii is between 70-100°F (21-38°C) during the day and not below 50°F (10°C) at night.
It is hardy in USDA zones 10-11, tolerating brief periods of cooler temperatures but should be protected from frost.
Fertilizing
Use a balanced cactus fertilizer with an NPK ratio of 10-10-10 or a diluted liquid fertilizer during the growing season, typically every 4-6 weeks.
Fertilizing should be reduced or stopped during the fall and winter months. Signs of nutrient deficiency include stunted growth and pale coloration.
Pruning
Pruning is generally not necessary for Parodia lenninghausii.
However, if you notice any dead or damaged segments, use clean, sharp scissors to remove them. Always wear gloves when handling cacti to avoid spines. Deadheading is not applicable as this plant does not produce flowers regularly.
Repotting
Repotting should be done every 2-3 years or when the plant outgrows its pot.
Choose a pot that is 1-2 inches larger in diameter. Signs that it needs repotting include roots growing out of the drainage holes or stunted growth. To repot, gently remove the cactus from its pot, shake off excess soil, and place it in the new pot with fresh soil.
Propagation
Propagation can be achieved through offsets or seeds.
For offsets, carefully remove them from the parent plant and allow them to dry for a few days before planting in a well-draining soil mix. For seeds, sow them in a cactus mix and keep them warm and moist until germination, which usually takes a few weeks. The best time for propagation is in spring.
When it's unhappy
Yellowing stems
Why it happens
Over-watering or poor drainage.
How to fix it
Reduce watering frequency and ensure the pot has adequate drainage.
Shriveling
Why it happens
Under-watering or low humidity.
How to fix it
Increase watering frequency and monitor humidity levels.
Root rot
Why it happens
Excess moisture in the soil.
How to fix it
Remove the plant from the pot, trim away affected roots, and repot in fresh, dry soil.
Pale coloration
Why it happens
Nutrient deficiency or insufficient light.
How to fix it
Fertilize with a balanced cactus fertilizer and ensure adequate sunlight.
Leggy growth
Why it happens
Insufficient light.
How to fix it
Move the cactus to a brighter location with more direct sunlight.
Care through the year
Spring
In spring, resume regular watering and fertilizing as the plant enters its active growth phase. Monitor for pests and ensure adequate sunlight.
Summer
During summer, maintain consistent watering every 2-4 weeks and provide full sun exposure. Watch for signs of heat stress, such as wilting.
Fall
In fall, reduce watering frequency as the plant prepares for dormancy. Stop fertilizing and ensure it receives enough light.
Winter
In winter, water sparingly, only when the soil is completely dry. Keep the plant in a warm location, away from drafts and frost.
Toxicity & Safety
Parodia lenninghausii is non-toxic to pets and children. However, the spines can cause irritation if touched, so caution is advised when handling.
Good to know
How often should I water my Parodia lenninghausii?
Water your Golden Barrel Cactus every 2-4 weeks during the growing season, allowing the soil to dry out completely between waterings.
What type of soil is best for Parodia lenninghausii?
A well-draining cactus mix is ideal, with a pH range of 6.0 to 7.0. You can also mix in perlite or sand to improve drainage.
Why are my Parodia lenninghausii leaves turning yellow?
Yellowing stems often indicate over-watering or poor drainage. Check the soil moisture and reduce watering if necessary.
Can I propagate my Parodia lenninghausii?
Yes, you can propagate it through offsets or seeds. Offsets should be allowed to dry before planting, while seeds require warmth and moisture for germination.
What temperature does Parodia lenninghausii prefer?
This cactus thrives in temperatures between 70-100°F (21-38°C) and should be protected from temperatures below 50°F (10°C).
How do I know when to repot my Parodia lenninghausii?
Repot when the plant outgrows its pot, indicated by roots growing out of the drainage holes or stunted growth.
Is Parodia lenninghausii toxic to pets?
No, Parodia lenninghausii is non-toxic to pets and children, but its spines can cause irritation if touched.
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