Accent
Octopus Agave
Agave vilmoriniana · Asparagaceae (Agavoideae)
Also called: Vilmorin's Agave, Octopus Arms Agave
Octopus Agave (Agave vilmoriniana) is a low-water accent well suited to Tucson and the low desert. It thrives in full sun to part shade. Expect greenish-yellow blooms spring.
Octopus Agave at a glance
- Water use
- Low (established)
- Sun
- Full sun to part shade; benefits from light afternoon shade or filtered light in the hottest low-desert exposures to prevent leaf scorch.
- Mature size
- 3-4 ft H x 5-6 ft W (rosette); flower stalk to 10-20 ft H
- Growth rate
- Moderate to fast for an agave; reaches blooming size in roughly 8-12 years (monocarpic).
- Bloom
- Greenish-yellow, Spring (typically March-May); blooms once at the end of life (monocarpic), then dies, leaving bulbils.
- Cold hardiness
- Hardy to about 20-25 F (USDA zones 9a-11); foliage can be damaged by hard frost below ~20 F.
- Soil
- Well-drained sandy or rocky soil; tolerates native decomposed-granite and caliche soils as long as drainage is good. Avoid waterlogged ground.
- Native range
- Endemic to mainland Mexico (cliffs and barrancas of southern Sonora, Chihuahua, Sinaloa, Durango, Nayarit, Jalisco, and Aguascalientes), roughly 600-1,700 m elevation. Not native to Arizona.
- Best used as
- Specimen/accent plant, Container planting, Spineless/soft-tipped agave for high-traffic areas, walkways, and patios, Poolside plantings, Modern and xeriscape designs
- Wildlife
- Flowers attract hummingbirds, bats, and pollinating insects; prized as a safe accent near walkways because leaves lack marginal spines.
- Toxicity
- Sap contains saponins and calcium oxalate that can irritate skin and mucous membranes; considered toxic if ingested by pets and people. The terminal leaf tip, though soft, can still prick.
How to grow Octopus Agave in Tucson & the low desert
Watering
Deeply but infrequently once established—every 2-4 weeks in summer heat, monthly or less in cooler months, none in winter. Established plants are very drought tolerant but look fullest with occasional deep irrigation.
Fertilizer & nutrients
Generally not required in landscape soils. If desired, apply a light dose of a balanced or low-nitrogen slow-release fertilizer once in spring; excess nitrogen produces soft, weak growth.
Pruning & care
Minimal—remove only dead, damaged, or frost-burned leaves at the base. Do not trim the leaf tips. After the single lifetime bloom the rosette dies and is removed; numerous plantlets (bulbils) form on the stalk for propagation.
Notes
Distinguished by soft, narrow, deeply channeled leaves that arch and twist like octopus arms, with no marginal teeth—safe for high-traffic spots. Monocarpic and does not pup at the base; instead it produces hundreds of bulbils on the dying flower stalk for easy propagation. Excellent low-desert performer despite not being Arizona-native.
Sources: AMWUA 'Landscape Plants for the Arizona Desert'; Arizona-Sonora Desert Museum (Genus Agave); University of Arizona Cooperative Extension; Plants of the World Online (Kew)