Agave

Sun

Full sun; tolerates light afternoon shade in very hot climates.

Water

Low once established. Water young plants during prolonged dry spells; let container compost dry between waterings and keep it nearly dry in winter.

Soil

Sharply drained sandy, gravelly or rocky soil. Avoid heavy clay and sites that stay wet, especially in winter.

Height

3-6 ft (0.9-1.8 m); flower stalk 20-30 ft (6-9 m)

Spread

6-10 ft (1.8-3 m) per mature rosette; offsets can form wider colonies

Flowers

A mature rosette produces a tall, branching stalk of yellow-green flowers, usually in summer. Flowering commonly takes several decades, not a century; that rosette dies afterward, leaving any offsets.

Foliage

Evergreen. Broad, stiff, blue-grey leaves arch outward from a dense rosette. Leaf edges have hooked teeth, and each leaf ends in a strong, sharp spine.

Growth

Slow to moderate; faster in warm climates with occasional summer water.

Care needed

Low

• Plant in a raised, sharply drained position, leaving room for the full leaf spread.
• Water newly planted specimens during dry weather, then reduce watering once roots are established.
• Use a gritty cactus compost in containers with unobstructed drainage holes; never leave pots standing in water.
• Feed container plants lightly once in spring; established plants in the ground rarely need feeding.
• Keep gravel mulch clear of the crown and remove unwanted offsets before they become large.
• In cold or wet climates, move container plants into a bright, frost-free shelter for winter.

Pruning. In spring, remove only dead or badly damaged lower leaves, cutting close to the base without injuring the crown. Wear eye protection, thick gloves and long sleeves; remove the dead rosette after flowering, using professional help for large specimens or tall stalks.

Spring

Check for winter rot and remove dead leaves once frost risk has passed.

Late spring

Plant or repot into sharply drained soil, and separate unwanted offsets.

Early summer

Gradually return overwintered pots to outdoor sun to prevent leaf scorch.

Summer

Water containers only after the compost dries; inspect leaf bases for pest damage.

Autumn

Reduce watering and clear fallen leaves from around the crown.

Winter

Keep sheltered pots bright and nearly dry; protect outdoor plants from prolonged rain and hard frost.

• Use as a single focal plant in a sunny gravel garden, with open space around the rosette.
• Pair with fine-textured ornamental grasses for contrast between stiff leaves and soft movement.
• Place in a large, stable container against a plain wall in a frost-free courtyard.
• Combine with drought-tolerant shrubs and succulents on a sunny, well-drained slope, well away from paths and play areas.

Garden styles it suits: Architectural minimal, Desert modern, Modern Mediterranean, Dry gravel garden, Desert / xeriscape and Mexican hacienda.

Plant it with: Lavender, Rosemary, Santolina, Blue fescue, Red yucca and Ice plant.

Wildlife: Flowers provide nectar and pollen for insects and, within parts of its flowering range, nectar-feeding birds and bats. Dense rosettes can shelter small animals, but the spines make it unsuitable beside busy garden routes.

• Crown or root rot: wet soil causes soft, collapsing growth. Improve drainage, stop watering and discard badly rotted plants; save only healthy offsets.
• Agave snout weevil: in regions where it occurs, larvae tunnel into the base and cause sudden collapse. Remove and dispose of infested plants promptly, and inspect nearby agaves.
• Scale insects or mealybugs: inspect sheltered leaf bases and treat small infestations with a labelled insecticidal soap, testing a small area first.
• Frost damage: leaves develop water-soaked patches and die back. Use a sheltered, dry site and move pots under cover before hard frost.

Treat as harmful to people, cats, dogs and horses. Sap from cut or broken leaves can cause marked skin irritation and blistering; chewing plant material may irritate the mouth and digestive tract. The severity of poisoning in pets and horses is not well documented. Sharp teeth and terminal spines also cause puncture injuries, and sap in the eyes needs urgent medical attention.

Where it spreads. Spreads by offsets and can form persistent colonies. It is invasive in parts of coastal and southern Australia, including New South Wales, South Australia and Western Australia, and in parts of New Zealand, South Africa and the Mediterranean, including Spain and Portugal. Check local guidance before planting and never dump offsets in natural areas.

• Spineless agave (Agave attenuata)

  Has soft-looking green leaves without marginal teeth or a sharp terminal spine, often on a visible stem; its flower spike curves rather than forming a tall, upright branching structure.

• Caribbean agave (Agave angustifolia)

  Usually has much narrower, straighter leaves in a denser, more symmetrical rosette than the broad, arching leaves of Agave americana.

• Aloe vera (Aloe vera)

  Has softer, gel-filled leaves with small edge teeth and no hard terminal spine. Its shorter flower stalks bear tubular yellow flowers, and flowering does not kill the rosette.

Agave comes from the Greek for noble or admirable, americana refers to its American origin, and century plant alludes to its long wait before flowering.

Propagation. Separate rooted offsets in spring or early summer using protective clothing and clean tools. Let cut surfaces dry and callus for several days, then pot into gritty compost and water sparingly until established. Seed is possible but slower.

Accepted botanical name

Agave americana

In the US and Canada

Native in the lower 48 states. Introduced in Hawaii and US Virgin Islands.

Native range

Arizona, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southwest and Texas.

Measured

Soil pH 6 to 8. Average height 121 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.