Palmer's agave

Sun

Full sun; light afternoon shade is useful in exceptionally hot sites.

Water

Low once established. Water deeply but infrequently during active growth, letting the soil dry between waterings; keep almost dry in winter.

Soil

Sharply drained sandy, gravelly or rocky soil. Avoid heavy clay, wet hollows and moisture-retentive potting compost.

Height

3-4 ft (0.9-1.2 m); flower stalk 12-20 ft (3.7-6.1 m)

Spread

4-6 ft (1.2-1.8 m)

Flowers

Summer, on mature plants only: pale greenish-yellow flowers, often with reddish or purplish buds, on a tall, branched stalk.

Foliage

Evergreen. Thick, rigid, blue-grey to grey-green leaves with brown marginal teeth and a strong terminal spine.

Growth

Slow to moderate, depending on warmth and summer moisture.

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Heat tolerant
• Wildlife
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Hard

Toughness

Needs looking after

Pick your zone, country, light and whether you have pets.

1. Planting day

   0.8 ft (0.25 m)

2. After 1 year

   1.2 ft (0.35 m)

3. After 2 years

   1.5 ft (0.46 m)

4. After 3 years

   1.8 ft (0.56 m)

5. After 5 years

   2.5 ft (0.76 m)

About 8 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Toxic

Native to

the US

Growth rate

Slow

• Plant on a raised mound or slope where winter rain drains away quickly.
• Water new plants when the root zone has dried; reduce watering once established.
• Use gravel mulch, keeping the leaf bases and central growing point clear.
• Avoid routine feeding in the ground; give container plants a light cactus fertiliser feed in spring if needed.
• In cold, wet climates, grow in a movable container and overwinter somewhere bright, sheltered and nearly dry.
• Leave its full mature width clear of paths, doors and play areas.

Pruning. In spring, remove fully dead lower leaves with long-handled tools, wearing gloves and eye protection; do not cut healthy leaves merely to reduce its size. After flowering, have the heavy stalk and dying rosette removed safely, preserving any healthy offsets.

Spring

Plant or repot once severe frost has passed, using a sharply drained growing medium.

Late spring

Remove dead leaves and check the leaf bases for rot or insect damage.

Summer

Water deeply during prolonged dry spells, then allow the root zone to dry.

Summer

Leave flowers for visiting wildlife; keep people clear if the tall stalk becomes unstable.

Autumn

Reduce watering and move container plants under bright, rainproof shelter before damaging cold.

Winter

Keep drainage outlets clear and remove fallen debris that traps moisture around the crown.

• Use a single rosette as a focal point in a sunny gravel garden.
• Combine with fine-textured ornamental grasses to contrast with its broad, rigid leaves.
• Plant on a dry bank among rocks, with smaller drought-tolerant perennials around its outer edge.
• Grow in a large, frost-resistant container in a sunny courtyard, away from circulation routes.

Garden styles it suits: Desert modern, Architectural minimal, Dry gravel garden, Desert / xeriscape, Southwestern and Low-maintenance.

Plant it with: Red yucca, Blue grama, Desert marigold, Parry's penstemon and Blackfoot daisy.

Wildlife: The nectar-rich flowers feed nectar-feeding bats within its native range, as well as hummingbirds and insects. It is native to parts of the southwestern United States and northern Mexico.

• Crown or root rot in wet soil: improve drainage, reduce watering and keep mulch away from the crown; discard plants with a soft, collapsing centre.
• Agave snout weevil in regions where it occurs: watch for sudden wilting and loose central leaves; promptly remove badly infested plants and larvae.
• Cold and wet damage: provide rain shelter and move container plants under cover; wait until spring before removing damaged tissue.
• Scorch after moving a sheltered plant into strong sun: increase sun exposure gradually over several weeks.

Sap from damaged leaves can cause marked skin and eye irritation in people. Treat all parts as potentially harmful if chewed by cats, dogs or horses; species-specific poisoning information is limited. The terminal spines and leaf teeth can also cause serious puncture injuries, so wear protective clothing and keep it away from children and pets.

• Parry's agave (Agave parryi)

  Usually forms a smaller, tighter, more rounded rosette with shorter, broader leaves; Palmer's agave has a more open rosette of longer leaves.

• American century plant (Agave americana)

  Usually grows larger, with longer, often arching or recurved leaves, and commonly produces numerous offsets; Palmer's agave is generally more upright and less freely offsetting.

• Mountain agave (Agave montana)

  Typically has a dense rosette of broader, greener leaves with prominent pale impressions; Palmer's agave is usually more open and blue-grey.

The epithet palmeri honours the botanist and plant collector Edward Palmer.

Propagation. Grow from seed sown in warmth in a free-draining medium. Some plants produce offsets; separate these in spring or early summer when they have roots, allow cut surfaces to dry, then pot into a gritty mix.

Accepted botanical name

Agave palmeri

In the US and Canada

Native in the lower 48 states.

Native range

Arizona, Mexico Northeast, Mexico Northwest and New Mexico.

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