American Century Plant
Agave americana · Century Plant · American AloeUSDA | Grow Zone
8-11Outdoors all year in zones 8 to 11. Anywhere colder, keep it as a houseplant. Protect it below 20°F.
- Light
- Full sun, 6-8 hours
- Water
- Every 2-4 weeks
- Humidity
- 30-50%
- Temperature
- 70-100°F (21-38°C)
- Difficulty
- Beginner
- Growth
- Slow
- Mature size
- Up to 6 ft tall
- Pets
- Mildly toxic to pets
Agave americana, commonly known as the American Century Plant, is a striking succulent native to Mexico. Its dramatic rosette of thick, spiky leaves makes it a popular choice for gardens and landscapes, appreciated for its low maintenance and drought tolerance.
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Ideal temperature
70-100°F is where it grows fastest. Below 20°F cold damage starts.
Spacing and harvest
- Mature size
- Up to 6 ft tall
- Plant apart
- 12-24 in
- Frost
- Half hardy: light frost only
Everything it needs
9 essentials at a glance
Watering
Agave americana prefers infrequent watering, allowing the soil to dry out completely between waterings.
During the growing season (spring and summer), water every 2-4 weeks, depending on humidity and temperature. In fall and winter, reduce watering to once a month or less. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaf curling and browning at the tips.
Light
This plant thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement is in a south or west-facing location. While it can tolerate partial shade, too little light may result in leggy growth and reduced vigor.
Soil
Agave americana prefers well-draining soil with a pH range of 6.0 to 7.5.
A cactus or succulent potting mix is recommended, or a blend of potting soil, sand, and perlite to ensure adequate drainage. Avoid heavy soils that retain moisture.
Humidity
This plant prefers low humidity levels, ideally around 30-50%.
To increase humidity, consider using a pebble tray with water or a humidifier, but be cautious as excessive humidity can lead to rot. Signs of humidity stress include browning leaf tips and wilting.
Temperature
Agave americana thrives in temperatures between 70-100°F (21-38°C) and is hardy in USDA zones 8-11.
It can tolerate brief periods of cold down to 20°F (-6°C), but prolonged exposure can damage the plant. During winter, protect it from frost.
Fertilizing
Use a balanced, slow-release fertilizer with an NPK ratio of 10-10-10 or a specialized cactus fertilizer.
Fertilize every 4-6 weeks during the growing season and refrain from fertilizing in fall and winter. Signs of nutrient deficiency include stunted growth and yellowing leaves.
Pruning
Pruning is minimal for Agave americana, but you should remove any dead or damaged leaves to maintain appearance and health.
Use clean, sharp pruning shears to cut leaves at the base. Deadheading is not necessary as this plant flowers only once in its lifetime.
Repotting
Repot every 2-3 years or when the plant outgrows its pot, indicated by roots growing out of the drainage holes.
Choose a pot that is 1-2 inches larger in diameter than the current one. Carefully remove the plant from its pot, trim any damaged roots, and place it in fresh, well-draining soil.
Propagation
Propagation can be done through offsets or pups that grow around the base of the plant.
The best time to propagate is in spring or early summer. Carefully remove the offsets with a sharp knife, ensuring some roots are attached. Allow the offsets to dry for a few days before planting them in well-draining soil.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or poor drainage.
How to fix it
Reduce watering frequency and ensure the pot has adequate drainage holes.
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 dry, well-draining soil.
Leaf curling
Why it happens
Under-watering or insufficient light.
How to fix it
Increase watering frequency and ensure the plant receives adequate sunlight.
Browning leaf tips
Why it happens
Low humidity or underwatering.
How to fix it
Increase watering and consider using a pebble tray to raise humidity levels.
Pests (e.g., mealybugs)
Why it happens
Poor air circulation or high humidity.
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 begins its growing season. Check for offsets that can be propagated.
Summer
During summer, ensure the plant receives full sun and monitor for pests. Water every 2-4 weeks, depending on heat and humidity.
Fall
In fall, gradually reduce watering as the plant prepares for dormancy. Stop fertilizing and check for any signs of stress.
Winter
In winter, minimize watering to once a month and protect the plant from frost. Keep it in a warm, dry location.
Toxicity & Safety
Agave americana is considered mildly toxic to pets and humans. The sap can cause skin irritation, and ingestion may lead to gastrointestinal upset, including nausea and vomiting. The sharp leaves can also cause injury if mishandled.
Good to know
How often should I water my Agave americana?
Water your Agave americana every 2-4 weeks during the growing season, allowing the soil to dry out completely between waterings. In winter, reduce watering to once a month.
What type of soil is best for Agave americana?
Agave americana thrives in well-draining soil with a pH of 6.0 to 7.5. A cactus or succulent potting mix is ideal to prevent root rot.
Why are my Agave americana leaves turning yellow?
Yellow leaves can indicate over-watering or poor drainage. Ensure you are allowing the soil to dry out completely before watering again.
Can Agave americana survive in cold temperatures?
Agave americana can tolerate brief cold spells down to 20°F (-6°C), but prolonged exposure to frost can damage the plant. Protect it during extreme cold.
How do I propagate Agave americana?
Propagate Agave americana by removing offsets or pups that grow around the base. Do this in spring or early summer, allowing them to dry before replanting.
What pests should I watch for on my Agave americana?
Common pests include mealybugs and aphids. Regularly inspect your plant and treat any infestations with insecticidal soap or neem oil.
How big does Agave americana get?
Agave americana can grow up to 6 feet tall and 8 feet wide, making it a striking focal point in gardens or landscapes.
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