How to care for Century Plant
Agave americana · Asparagaceae
A grand architectural agave with broad blue-grey leaves edged in hooked teeth and tipped with a serious terminal spine. Despite the name it flowers after decades, not a century — and indoors it simply grows slowly into a striking sculptural rosette. Give it sun, grit, and space, and it asks for almost nothing else. Water roughly every 18 days while it's growing (about every 40 in winter), give it direct sun, kept above 41°F (5°C) — dry air is fine for it.
Care at a glance
Water thoroughly but rarely, only after the soil has been completely dry for a while; it stores months of reserves in its leaves.
It demands the sunniest position you have — direct sun most of the day — or it slowly loses form and vigor.
One or two dilute cactus feeds per year; overfeeding pushes soft, uncharacteristic growth.
Mistakes that kill this plant
- Winter watering in a cold room — the rosette core rots invisibly.
- A shady placement that slowly starves this sun-dependent plant.
- Ignoring the spines around pets and children; the sap and punctures both cause harm.
Seasonal tips
- Summer it outdoors in full sun if you can — indoor light is barely enough long-term.
- Keep it cool and almost completely dry through winter.
- Blunt the terminal spines with a nail clipper if the plant sits in a walkway.
Is it safe for pets?
We have Century Plant recorded as toxic to cats and dogs.
Full pet-safety details for cats & dogsCare for your Century Plant on autopilot
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Toxicity here is informational, not a safety guarantee. Those are our own records, compiled by following the ASPCA's published toxic and non-toxic plant lists and Pet Poison Helpline's plant poison list rather than copied from them — confirm anything that matters against those lists or with your vet. If your pet ingested this plant, contact your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.