Pocket BotanistPlant guide
Barrel Cactus.
Ferocactus
Pronounced feh-roh-KAK-tus
Also known as barrel cacti, barrel cactus, barrel cactuses
These iconic, stout cacti are famous for their barrel-shaped bodies and fierce, hooked spines. They thrive in harsh, arid environments and bring a bold, architectural look to any collection. You will love how their slow growth makes them perfect, long-term companions.
At a glance
- Care level
- Easy
- Plant type
- Succulent
- Light
- Full sun
- Indoor light
- Direct sun
- Water
- Every 14 to 30 days
- Mature size
- 3 to 10 feet tall
- Growth rate
- Slow
- Hardiness
- USDA 9 to 12
- Bloom time
- Late spring to summer
Care
Provide plenty of direct sun and ensure your potting mix drains extremely well to prevent rot. Watch for shriveling as a sign of thirst, but always keep the plant dry during the cooler winter months.
- Watering
- Allow the soil to dry out completely between waterings, especially in winter.
- Feeding
- Apply a balanced, low-nitrogen cactus fertilizer only during the active growing season.
- Pruning
- Only remove dead or damaged tissue with sterilized tools if absolutely necessary.
- Repotting
- Repot only when the plant has clearly outgrown its container or the soil has degraded.
- Soil
- Gritty, well-draining cactus mix
- Soil pH
- 6.0 to 7.5
- Temperature
- 5 to 45°C
- Humidity
- 10 to 40%
- Drought tolerance
- High
- Lifespan
- Perennial, can live for several decades.
- Deer and rabbits
- High
Signs it needs repotting
- Roots growing out of the drainage holes.
- The plant has become top heavy and unstable.
- The soil has become compacted and no longer drains well.
Safety
- People
- The plant is not toxic, but its sharp spines pose a significant physical injury risk.
- Pets
- The sharp spines can cause physical injury to curious pets, though the plant is not chemically toxic.
- Children
- Keep this plant well out of reach of children because the sharp, hooked spines can cause painful injuries.
- Contact allergens
- The spines can cause mechanical irritation and puncture wounds to the skin.
- Airborne allergens
- There is no notable respiratory allergen risk.
- Edibility
- While the fruit is technically edible, it is often dry and flavorless, so it is not recommended for consumption.
How to identify it
- Stout, barrel-shaped succulent body
- Prominent, deep vertical ribs
- Strong, often hooked, colorful spines
- Small, funnel-shaped flowers at top
- Height
- 0.3 to 3m
- Spread
- 0.2 to 1m
- Leaves
- green, blue-green, evergreen
- Flowers
- yellow, orange, red, 3 to 8cm
- Fruit
- yellow, red, Late summer
Problems to watch for
- MealybugsCommon
- Root RotCommon
- Scale InsectsUncommon
- Spider MitesUncommon
Check your barrel cactus from a photo
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Growing it
- Propagation
- seed
- When to plant
- spring, summer
- Overwintering
- Keep the plant dry during the winter months to prevent rot. Move it to a frost free location if temperatures drop near freezing.
- In containers
- It grows well in pots, provided you use a well draining cactus mix and a pot with large drainage holes.
Seed
- 1. Sow seeds in a well draining cactus soil mix.
- 2. Keep the soil lightly moist and warm until germination.
- 3. Gradually reduce watering as the seedlings establish.
Group plants with similar low water needs to prevent accidental overwatering of your cactus.
Grows well with
- Agave — They share similar water and light requirements in a desert garden.
- Ocotillo — This plant provides a nice vertical contrast to the rounded shape of the barrel cactus.
Similar species
- Echinocactus — Often confused with Ferocactus due to its similar barrel shape and prominent spines.
Science
- Family
- Cactaceae
- Genus
- Ferocactus
- Order
- Caryophyllales
- Class
- Magnoliopsida
- Native range
- Arid regions of the Southwestern United States and Mexico.
- Conservation
- Some species are threatened in the wild due to habitat loss and illegal collection.
It survives in harsh desert environments by storing water in its succulent stem and using spines to shade its surface.
- Value to wildlife
- nectar source
- Pollinators
- bees, butterflies
- Uses
- ornamental, xeriscaping
Through the year
Ecological indicators
- Salinity
- 2/9
- Soil reaction
- 7/9
- Light
- 9/9
- Temperature
- 8/9
- Moisture
- 1/9
- Nutrients
- 2/9
Taxonomy resolved against GBIF.
Questions people ask
- How often should I water my Ferocactus?
- Water sparingly, allowing the soil to dry out completely between waterings.
- Does it need full sun?
- Yes, it thrives in bright, direct sunlight for most of the day.
Where the name comes from
The name Ferocactus comes from the Latin ferox, meaning fierce, referring to the formidable spines.
Good to know
- Ferocactus species can live for many decades in the right conditions.
- The ribs of the barrel cactus help the plant expand as it absorbs water.
- These plants are incredibly efficient at storing water to survive long droughts.
Also in
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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.