Century plant
Agave americana · Asparagaceae
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The gardener's calendar
Century plant is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Foliage
- Evergreen, thick and fleshy
- Flowering
- August to October
- Adult size
- Up to 2 m in height
- Growth
- Slow to moderate
- Hardiness
- Tender, down to around -5°C
- Origin
- Mexico
- Soil type
- Well-drained soil, sandy or gravelly
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Agave americana dreads excess water above all: very well-drained soil, gravel, no regular watering once established. Only water: a few times during severe drought.
The common mistake
People water it regularly in summer thinking every living plant needs it: roots rot irreversibly, the agave blackens from the base and can decline rapidly.
The pro's trick
Grow it in a pot with pure cactus compost rather than in the ground if you're in a humid region: you control watering better and can bring it inside before hard frosts.
Care
Watering
Agave americana is a very drought-resistant plant: water moderately during the growing period (spring-summer), then reduce drastically in autumn-winter. In pots, let the soil dry out completely between waterings. Excess water is the main risk, potentially causing root rot.
Light exposure
This plant demands maximum sunlight: place it in full sun, at least 6 to 8 hours daily. The brighter the exposure, the more compact and colorful the foliage remains. Indoors, choose a very bright window or a sunroom.
Soil and drainage
Very well-drained soil is essential. Use a specific cactus-succulent mix or prepare a substrate made of potting soil, sand and pumice. Avoid any rich or overly moist soil, which would promote rot.
Fertilizing
Agave americana is frugal: light diluted fertilizer in spring-summer is more than enough. You can also skip fertilizing altogether, as the plant thrives in poor soil. Stop all feeding in autumn-winter.
Pruning
No pruning is necessary. Simply remove dead or damaged leaves from the base of the rosette. Be careful: the leaves have sharp marginal spines—handle with caution and protective gear.
Diseases and pests
In dry, well-drained conditions, Agave americana remains quite resistant. Watch for soft rot if the environment is too humid. Rarely, scale insects may settle in warm, dry environments. Treat by manual cleaning or targeted intervention if needed.
Did you know?
Agave americana was long nicknamed the 'Century Plant' because people wrongly believed it flowered only once every hundred years; in reality, it typically flowers between 8 and 30 years depending on conditions. Its enormous yellow flower spikes can reach up to 10 meters tall, and after this spectacular bloom, the mother rosette dies naturally (monocarpy), leaving behind numerous offsets.
Where to buy it
Plant in spring, once all risk of frost has gone. Pick a plant with healthy foliage and roots that are not exposed. Best time: from April to June.
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Tips generated and checked by Viridia — adapt them to your local climate.