Key Facts
- Large evergreen succulent forming a dramatic rosette of thick leaves
- Drought tolerant once established and adapted to poor soils
- Produces pups that form clumps and allow vegetative spread
- Monocarpic rosette usually dies after producing a tall flowering stalk
- Flowering often occurs in summer after many years of growth
- Leaves have sharp marginal spines and a terminal spine
- Prefers very well drained soil and suffers in waterlogged conditions
- Sap can cause skin and eye irritation and ingestion may upset pets or people
Century Plant is a large evergreen succulent with a dramatic rosette of thick, spiny leaves used as a focal specimen in dry sunny landscapes. It tolerates poor soils and drought once established but the flowering rosette usually dies after producing a tall spike, leaving pups that form clumps.
Identification
Thick, stiff leaves form a broad rosette typically 3 to 6 feet high with a mature spread of about 6 to 10 feet. Leaves have sharp marginal spines and a pointed terminal spine. Mature plants are monocarpic and will produce a tall flowering stalk in summer before the rosette dies.
Where to grow and best uses
Grow in full sun to light afternoon shade for best form and flowering. Use as a dramatic focal plant, in xeriscapes, rock gardens or poor sandy soils where few plants persist. USDA hardiness is generally listed as zones 8 to 11 with reports of survival into protected spots in zone 7.
Soil and planting
Plant in very well drained sandy or gritty soil. Avoid heavy clay and waterlogged ground because persistent moisture leads to root rot and plant decline. Allow about 6 to 10 feet between mature rosettes or clumps to accommodate pups and spread.
Watering and establishment
Once established the plant is drought tolerant and needs only occasional water. Overwatering or poor drainage causes root rot and a decline in vigor. During establishment water sparingly and watch for soft or collapsing leaves as signs of excess moisture.
After flowering and maintenance
The flowering rosette usually dies after bloom. Remove the dead rosette and leave or transplant the offsets that appear at the base. Plants spread by pups and will form clumps over time; remove or pot off pups to limit naturalizing.
Containers and cold protection
Century Plant can be grown in containers where winters are colder than its hardiness range. Use a very well drained potting mix and move containers under cover before hard frost. Reduce watering in winter to avoid root problems.
Propagation
Propagate by offsets or pups for quickest, true-to-parent results; plants can also be grown from seed. Offsets are usually available around the parent plant and can be cut or lifted and potted or replanted.
Safety
Sap can cause skin and eye irritation so handle plants with gloves and eye protection. Ingestion may cause gastrointestinal upset in people and pets; contact local poison control or your veterinary service for guidance if exposure occurs.
Frequently asked questions
- How fast does Century Plant grow?
- Growth varies with climate and cultivar. Rosettes typically reach about 3 to 6 feet over several years; growth is faster in warm, sunny, well drained sites.
- Will Century Plant spread and become invasive?
- It spreads by offsets and forms clumps in warm climates. Remove or transplant pups to control spread; in its hardy range it rarely behaves like a high risk invasive.
- Does it flower every year?
- No. Century Plant is monocarpic and usually blooms once at maturity, often in summer; the timing and age at flowering vary widely by climate and cultivar.
- Can I grow Century Plant in a pot?
- Yes. Use a very well drained mix, keep watering to a minimum, and protect the container from hard frost in colder areas.
- Is Century Plant poisonous to pets?
- Sap can irritate skin and eyes and ingestion may cause vomiting or diarrhea; consult the ASPCA or local poison control for treatment recommendations.
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