Agave parryi var. huachucensis, the Huachuca agave

Agave parryi var. huachucensis, the Huachuca agave, is a medium-sized, blue-grey rosette agave that grows wild in the oak and pine woodlands of the mountains of south-eastern Arizona and neighbouring Sonora, in Mexico. First described in 1888 as a species in its own right, Agave huachucensis, it has been treated since 1943 as a variety of Agave parryi, and it is the most robust member of that complex: larger leaves, a broader flowering panicle and larger flowers than the typical form. Gardeners know it as one of the more frost-tolerant agaves, although the published figures vary widely and depend heavily on winter dryness, as this page explains.

Key facts about Agave parryi var. huachucensis

  • Accepted name (POWO): Agave parryi var. huachucensis (Baker) Little, published in American Journal of Botany 30: 235 (1943)
  • Former names and synonyms: Agave huachucensis Baker (1888, basionym); Agave applanata var. huachucensis (Baker) Mulford (1896)
  • Family: Asparagaceae (subfamily Agavoideae)
  • Common names: Huachuca agave; the broader names Parry’s agave and mescal agave apply to the whole species (see Common names)
  • Natural range: south-eastern Arizona to Sonora, Mexico (POWO); centred on the Huachuca Mountains
  • IUCN status: the variety is not assessed separately; Agave parryi as a whole is reported as Least Concern (2020), not verified directly on the Red List
  • CITES: no listing found for Agave parryi (see Conservation status)
  • Documented hardiness: reported survival of about −15 °C in dry soil for established plants; estimates range from −12 °C (wet winters) to around −20 °C; see Cold hardiness
  • Exposure and soil: full sun, very free-draining gravelly soil, dry in winter
  • Habit and adult size: rosette 45–75 cm tall and 75–85 cm across; offsets freely; flowering stalk reported up to 6 m
  • Toxicity: no data specific to this variety; agave sap is a known skin irritant and the spines cause injuries (see Toxicity and precautions)

How to recognise Agave parryi var. huachucensis

Look for a dense, blue-grey to grey-green rosette of broad, rigid leaves edged with dark brown teeth and tipped with a stout, dark terminal spine, larger in every part than the typical Agave parryi. The Flora of North America gives the following measurements, which are the most reliable figures available:

  • Rosette: 45–75 cm tall and 75–85 cm across, suckering to form clumps over time;
  • Leaves: 32–65 cm long and 10–20 cm wide, with an ovate blade, glaucous grey to blue-grey, the margins armed with prominent brown teeth;
  • Flowers: 62–81 mm long, with a perianth tube of 8–9 mm, tepals of 20–27 mm, filaments of 46–58 mm and an ovary of 34–47 mm;
  • Flowering season: mid-spring to early summer in the wild.

Horticultural sources add that the flowering stalk is a branched panicle up to about 6 m tall, bearing yellow to greenish-yellow flowers tinged with pink, and that rosettes flower only after more than ten years. Like almost all agaves, each rosette is monocarpic: it dies after flowering, but the offsets produced around its base carry the clump on. Some websites state that the leaves can reach 35 cm in width. That figure is far outside the 10–20 cm given by the Flora of North America and is probably a transcription error; it is not repeated here.

Hybrids

No natural or garden hybrid involving Agave parryi var. huachucensis was documented in the sources consulted. Selected clones, on the other hand, are sold under cultivar names. The American nursery Plant Delights lists ‘Excelsior’ and ‘Desert Delight’ under the name “Agave parryi ssp. huachucensis“, and a variegated form is discussed by growers on the Agaveville forum. These are commercial selections whose origin could not be checked in detail. Note that the rank “subspecies” used by that nursery is not the one accepted by POWO.

Possible confusions

The Huachuca agave is easily confused with other forms of Agave parryi, and even specialists disagree on where to draw the lines. The main points of comparison are:

  • Agave parryi var. parryi, the typical form of central and south-eastern Arizona: compact, globose rosettes; smaller leaves, a narrower panicle and smaller flowers than the Huachuca agave.
  • Agave parryi var. couesii, from Yavapai and Gila counties in Arizona: a smaller plant with leaves less tightly overlapping and smaller flowers.
  • Agave parryi var. truncata, from the Durango–Zacatecas border in Mexico: very short, broad leaves with a blunt, truncate tip, giving the well-known “artichoke” shape.
  • Agave parryi subsp. neomexicana, from New Mexico and western Texas, a smaller plant generally regarded as the most cold-hardy form of the complex.

In the trade, the confusion is made worse by names. “Artichoke agave” is applied by some retailers to the Huachuca agave, but it is used more widely for Agave parryi var. truncata. Growers on Agaveville also report plants bought under one name that turned out to be another, including a Huachuca agave sold as a neomexicana form. If the provenance matters to you, particularly for cold hardiness, buy from a supplier who can state where the plant or its seed came from.

Taxonomy

POWO accepts Agave parryi var. huachucensis (Baker) Little as a distinct variety of Agave parryi Engelm., a species of the genus Agave in the family Asparagaceae. Its native range is given as south-eastern Arizona to Sonora.

The name has a simple history. John Gilbert Baker described the plant as a species, Agave huachucensis, in his Handbook of the Amaryllideae (1888), from material collected by Cyrus Guernsey Pringle in the Huachuca Mountains on 30 June 1884. In 1896 Mulford placed it as a variety of another species, Agave applanata var. huachucensis. The combination now in use, Agave parryi var. huachucensis, was published by Little in 1943, in a paper by L.D. Benson in the American Journal of Botany (volume 30, page 235); this is why IPNI cites the author as “Little in L.D.Benson”. The reasoning behind these successive transfers could not be consulted: none of the sources available explains the arguments of Mulford or Little, so no reason is suggested here. In practice, anyone searching for Agave huachucensis is looking for this plant.

Two points deserve attention. First, POWO lists five accepted infraspecific taxa of Agave parryi: subsp. parryi, subsp. neomexicana (Wooton & Standl.) B.Ullrich, and three varieties, couesii, huachucensis and truncata. Subspecies and varieties therefore sit side by side in the list, an unusual arrangement; the Flora of North America (Reveal & Hodgson, 2002) handles the complex differently, with the varieties placed within subspecies parryi. This page follows the POWO name, which is identical in both systems. Second, the value of the variety itself is debated. Howard Scott Gentry, in his 1982 monograph, separated it from the typical form by its larger size, larger leaves, broader panicle and larger flowers. Field observers quoted on Agaveville and in the Wikipedia article find blue, green, narrow- and broad-leaved plants growing together across the region, and regard the boundaries between couesii, huachucensis and parryi as too subjective to be meaningful; some doubt that the Huachuca agave deserves even varietal rank. No recent genetic study settling the question was found.

Etymology and history

The epithet huachucensis means “from the Huachuca Mountains”, the Latin suffix -ensis marking the place of origin; it refers to the range in Cochise County, Arizona, where the type was collected. The species name parryi honours Charles Christopher Parry (1823–1890), an English-born American botanist and physician; George Engelmann described Agave parryi in 1875.

The origin of the name Huachuca itself is less certain. A local history document from the Gila Valley Regional Historical Collection states that Guachuca was the name of a Pima village, translated as “thunder”, and that the form Sierra de Huachuca was used by Captain Juan Mateo Manje in 1694 when he travelled with Father Kino. Other popular sources attribute the name to the Apache or translate it as “place of thunder”. These are secondary sources, and the precise indigenous etymology should be regarded as unconfirmed.

The earliest known collection is Pringle’s, made in 1884 at 5,000 to 8,000 feet (about 1,500 to 2,450 m) in the Huachuca Mountains; an isotype is held by the Pringle Herbarium at the University of Vermont. How and when the plant entered horticulture was not documented in the sources consulted. Today it is widely offered by specialist nurseries in North America, Europe and New Zealand, and the University of Arizona Campus Arboretum holds several accessions.

Common names

The only English name specific to this variety is Huachuca agave, used by Wikipedia, botanic gardens such as the Chicago Botanic Garden, and specialist websites. Other names are shared or ambiguous:

  • Parry’s agave and mescal agave (English): names of Agave parryi as a whole, used for all its forms. The name mescal is linked to the Mescalero Apache, who roasted and ate the plant.
  • Artichoke agave (English, commercial): sometimes applied to the Huachuca agave by retailers, but mainly used for Agave parryi var. truncata, hence a frequent source of confusion.

No attested Spanish or indigenous name specific to this variety was found; any local names in Sonora remain undocumented in the sources consulted.

In the wild

Agave parryi var. huachucensis is a mountain plant of the “sky islands”, the isolated ranges that rise above the desert grasslands of south-eastern Arizona and northern Mexico. Its core is the Huachuca Mountains, close to the Mexican border, within the Coronado National Forest. Smaller populations are reported in the Dragoon Mountains of Arizona and south of the border in Sonora, as far as the Sierra Huachinera; the llifle encyclopedia adds that populations in adjacent north-eastern Chihuahua probably belong here too, which remains to be confirmed.

It grows in gravelly places in oak woodland on open slopes and, higher up, in pine forest. The Flora of North America gives an elevation of 1,500–2,200 m; other sources extend the upper limit to about 2,480 m, or even 2,700 m. At these altitudes winters bring regular frost, while most rain falls during the summer monsoon, a combination that explains much of its behaviour in gardens: hardy to dry cold, far less tolerant of cold combined with wet soil.

A study of wild and “anthropogenic” agave populations published in PubMed Central notes, citing Gentry (1982), that Apache groups harvested mature wild agaves over the past 500–600 years without cultivating them, so that local populations were not subject to long-term human selection.

Conservation status and regulation

There is no evidence of any threat to this variety, but it has no separate conservation assessment. Its status can be summarised as follows (databases searched on 30 September 2026):

  • IUCN Red List: Agave parryi is reported as Least Concern, assessed in 2020, at the species level. This information comes from secondary sources (Wikipedia and aggregators); the Red List itself could not be consulted directly. No separate assessment of Agave parryi var. huachucensis was found.
  • CITES: no listing of Agave parryi was found. The CITES documents consulted mention other agaves, notably Agave victoriae-reginae in Appendix II. Species+ could not be checked directly.
  • Protected areas: the Huachuca Mountains lie largely within the Coronado National Forest, public land managed by the United States Forest Service; any collecting there is a matter for that agency.

The plant is propagated routinely in nurseries from offsets and seed, so there is no reason to buy wild-collected material. Regulations change: check the current rules with the relevant authorities before importing plants or seed.

Cultivation

The Huachuca agave is an easy plant wherever winters are dry or drainage is excellent: full sun, a lean mineral soil and no water in winter are the three essentials. Sources agree that it is drought tolerant, copes with high summer heat and needs little care once established.

Outdoor / In-ground cultivation

Plant in full sun, in the best-drained spot available: a slope, a raised bed, a rock garden or a gravel border. In climates with wet winters, a mound of gravel-rich soil and a mineral mulch around the collar keep the base of the rosette dry. The soil can be poor; rich, moist soils give softer growth that suffers more in cold weather. Water during the growing season only in long droughts, and stop altogether from autumn onwards.

Allow room for the adult rosette, up to about 85 cm across, and for its offsets. The teeth and terminal spines are dangerous: keep it away from paths and play areas. One American retailer notes that it tolerates high temperatures but grows best below about 38 °C (100 °F).

The most consistent outdoor results by climate type are summarised under Cold hardiness below. In short: little difficulty in dry-winter climates down to about −15 °C, more risk in cool, rainy maritime climates, where the practical limit reported by British nurseries lies between −12 and −15 °C.

Container cultivation

Container culture is the safest option where winters are both cold and wet, and it suits the plant’s moderate size. Use a wide, heavy pot with a large drainage hole and a very mineral mix (pumice, grit, coarse sand, a small share of organic matter). Water generously in summer, letting the mix dry out between waterings, and keep it almost dry from autumn to spring.

In winter, a pot freezes faster and more deeply than open ground, so a potted plant is more exposed than the same plant in the garden. The RHS advises placing the plant outdoors in summer and wintering it in a greenhouse or conservatory; a bright, cool, dry, frost-free or lightly frosted shelter is the usual solution. Repot only when the root ball fills the container, wearing thick gloves.

Propagation

The easiest method is to separate offsets, which the plant produces freely. Detach a rooted offset in spring or early summer, let the wound dry for a few days, then plant it in a dry to barely moist mineral mix. Seed is the other option, as with any agave: it gives genetically varied plants, which matters for a taxon whose features vary so much, but growth is slow. Cultivars such as ‘Excelsior’ and ‘Desert Delight’ should be propagated from offsets to keep their characteristics.

Pests and diseases

The main risks are rot from winter wet and, in warm regions, the agave snout weevil. No problem specific to this variety was found; the following are documented for agaves in general:

  • Agave snout weevil (Scyphophorus acupunctatus): the larvae tunnel into the heart of the rosette, and the bacteria they introduce cause rapid rot.
  • Root and collar rot: the most common cause of losses in wet climates, prevented by drainage and a dry winter.

Cold hardiness

The Huachuca agave is among the hardier agaves, but there is no single reliable figure: reports range from −12 °C in wet winters to about −20 °C in dry ground, and the soil moisture matters as much as the temperature. The ratings published by nurseries and gardens illustrate this spread:

  • Plant Delights (North Carolina, USA): USDA zones 6a to 8b “at least” for the standard plant (zone 6a: −23.3 to −20.6 °C), and 7b to 9b for its cultivars ‘Excelsior’ and ‘Desert Delight’.
  • Specialist nurseries in the United Kingdom: at least −15 °C with perfect drainage, but “somewhere between −12 °C and −15 °C” as a realistic limit in the humid British winter.
  • Cistus Nursery (Oregon, USA): takes −12 to −9 °C (10 to 15 °F) “in stride”, mid to upper USDA zone 8, lower if very well drained.
  • Chicago Botanic Garden: USDA zones 8 to 11.
  • RHS (United Kingdom): hardiness rating H2 according to the search summaries of its plant database, which recommends wintering under glass. This is much more cautious than the nursery figures.
  • Other retailers: −20 °C, or zones 5 to 11. No documented observation supporting these figures for this variety was found.

Documented grower results by climate type

  • Humid subtropical and warm-temperate climate, south-eastern United States (USDA 7b): on Agaveville, a grower in New Hill, North Carolina, describes the plant as “hardy as a rock” in the ground (date not specified). In the same wet-winter region, other growers stress that agaves hardy to very low temperatures in dry climates may not tolerate the damp of an east-coast zone 7b.
  • Other United States reports (climate not specified): in a report on Agaveville, established plants in the ground looked good after about −15 °C (5 °F) one week and −11 °C (12 °F) the next (location and year not specified in the summary available). Another grower reports that a Huachuca agave bought as a neomexicana form can sit in ice for a week without damage.
  • Oceanic climate, Pacific Northwest and British Isles: nurseries in Oregon and the UK consider it reliable to about −9 to −12 °C with good drainage and possible below that in dry soil; in the UK the limit is placed at −12 to −15 °C because of winter wet.
  • Mediterranean climate: suited in principle to dry-winter coastal climates, but no measured result was found for the Mediterranean basin, California or other Mediterranean regions.
  • Southern hemisphere: the plant is sold in New Zealand, where retailers describe it as tolerant of moderate frost. No measured frost result was found for New Zealand, Australia or South Africa.

Growers on Agaveville add two useful points. Larger plants survive marginal winters better than small ones, and a dry, cool autumn before the first hard frost helps the plant harden off. All of these reports concern established plants in the ground; none gives precise data for young plants or potted specimens, which should be considered less hardy.

Toxicity and precautions

No toxicity data exist for this variety specifically, but the risks known for the genus Agave should be assumed. Agave sap contains needle-like calcium oxalate crystals (raphides) and saponins, which cause irritant contact dermatitis in humans, as documented for Agave americana and Agave tequilana. The veterinary literature states that household pets rarely eat enough to be poisoned but that the sap can cause drooling and the spines can injure the mouth; Agave lechuguilla causes liver damage in grazing livestock.

In practice, the spines are the most immediate danger, especially for eyes and for children. Wear thick gloves, long sleeves and eye protection when handling or dividing the plant. In case of ingestion, eye contact or a severe skin reaction, contact a poison control centre, a doctor or a veterinarian.

Traditional uses

Agaves of the Agave parryi complex were an important food and fibre source for the peoples of the American South-West. Most documented uses concern the species as a whole rather than this variety in particular:

  • Food: the Mescalero Apache roasted the crowns (the heart of the rosette) in pits, and attached cultural significance to their appearance after roasting.
  • Drinks: the sap was drunk fresh or fermented, and roasted heads were used to make mescal, according to secondary sources.
  • Dye: the root cortex, boiled, reportedly gave a red dye used for war paint and for colouring cloth.
  • Other uses: the University of Arizona Campus Arboretum states that Native Americans used Agave parryi var. huachucensis for food, fibre, soap and medicine.

These uses come from botanical gardens, encyclopedias and horticultural websites, not from the primary ethnobotanical literature, which could not be consulted.

Frequently asked questions

How cold can Agave parryi var. huachucensis survive?

About −15 °C for an established plant in dry soil, according to the most consistent reports. In wet winters, the practical limit reported by British nurseries is −12 to −15 °C. Figures of −20 °C or lower are published but not supported by documented observations for this variety.

Is Agave huachucensis the same plant?

Yes. Agave huachucensis Baker is the original name, published in 1888, and is now a synonym of Agave parryi var. huachucensis. The same applies to Agave applanata var. huachucensis. Some nurseries also sell it as “ssp. huachucensis“, a rank not accepted by POWO.

What is the difference from Agave parryi var. truncata?

The leaf tip is the easiest clue. Agave parryi var. truncata has very short, broad leaves with a blunt, cut-off tip, whereas the Huachuca agave has longer leaves (32–65 cm) ending in a pointed tip. The two also come from different regions: Arizona and Sonora for the Huachuca agave, Durango and Zacatecas for Agave parryi var. truncata.

Does it die after flowering?

Yes, the flowering rosette dies, but the plant does not disappear. It usually flowers after more than ten years, on a stalk up to about 6 m tall. By then it has generally produced offsets, which take over.

Can it be grown in a pot?

Yes, and it is the safest choice in cold, wet climates. Use a wide pot, a very mineral mix and minimal winter watering. A pot freezes more deeply than the ground, so shelter it in a bright, cool, dry place during hard frosts.

Is the Huachuca agave dangerous for children and pets?

Mainly because of its spines. The teeth and terminal spine can cause deep wounds, particularly to the eyes. Its sap, like that of other agaves, can irritate the skin. Plant it away from paths and play areas.

Further reading on Succulentes

Reference websites

Bibliography

  • Baker, J.G. (1888). Handbook of the Amaryllideae, including the Alstroemerieae and Agaveae. pp. 172–173. [Protologue of Agave huachucensis; reference taken from IPNI and the Pringle Herbarium, original text not consulted.]
  • Engelmann, G. (1875). Transactions of the Academy of Science of St. Louis 3: 311. [Protologue of Agave parryi; citation from secondary sources, title of the paper not verified.]
  • Mulford (1896). Report (Annual) of the Missouri Botanical Garden 7: 85. [Combination Agave applanata var. huachucensis; citation from POWO, text not consulted.]
  • Little in Benson, L.D. (1943). American Journal of Botany 30(3): 235. [Combination Agave parryi var. huachucensis; citation from IPNI, title of the paper not verified.]
  • Gentry, H.S. (1982). Agaves of Continental North America. University of Arizona Press, Tucson. [Reference monograph; distinguishing features of the variety, cited through secondary sources.]
  • Reveal, J.L. & Hodgson, W.C. (2002). Agave. In: Flora of North America Editorial Committee (eds.), Flora of North America North of Mexico, vol. 26. Oxford University Press, New York. [Peer-reviewed flora; measurements, habitat and elevation, consulted through eFloras.]