Agave parryi var. truncata
| Light | Full sun to bright light; tolerates some part shade |
|---|---|
| Water | Deep but infrequent; allow soil to dry fully between waterings, keep dry in winter |
| Soil | Gritty, fast-draining mineral mix (see Soil and potting mix) |
| Temperature | Hardy to roughly USDA zone 8 (to about −9 °C / 15 °F); notably less cold-hardy than typical A. parryi |
| Propagation | Offsets (pups); seed |
| Toxicity | Sap can irritate skin and mucous membranes; considered mildly toxic if chewed or ingested by pets. Rigid spines are also a physical hazard |
Agave parryi var. truncata, widely known as the artichoke agave, is a compact, symmetrical variety of Agave parryi prized for its dense rosette of broad, short, powder-blue leaves. The tightly overlapping leaves — shorter and rounder than in the typical species — give the plant a plump, artichoke-like silhouette, and each leaf is tipped with a dark terminal spine and edged with small marginal teeth. It is one of the most popular agaves in cultivation.
Description
Agave parryi var. truncata forms a solitary, low, symmetrical rosette that typically reaches around 45–60 cm across when mature, though it stays smaller and tighter than many of its relatives. The leaves are broad, short and rounded, colored an attractive chalky blue-grey, and they overlap so closely that the whole rosette looks like a sculpted artichoke. Each leaf bears small dark teeth along its margins and ends in a stout, dark terminal spine.
Like other agaves, this is a monocarpic plant: after many years an established rosette sends up a tall branching flower spike, blooms, and then dies. Before flowering, however, it usually produces a ring of offsets (pups) around its base, so a clump persists even as individual rosettes complete their life cycle. The bud imprints left on emerging leaves add to its geometric, collectible appeal.
Distribution and habitat
The species Agave parryi is native to the highlands of the southwestern United States (Arizona, New Mexico) and northern Mexico, where it grows on rocky slopes and grasslands at elevation. The variety truncata is centered on high-elevation habitats along the border of the Mexican states of Durango and Zacatecas, in oak–juniper grassland at around 2,300 m (7,500 ft). These montane origins give the plant its preference for bright light and sharp drainage; despite them, it is less cold-hardy than the more northerly forms of the species.
Cultivation
The artichoke agave is an undemanding, rewarding plant for both containers and the open garden. Grow it in full sun to bright light in a very free-draining, mostly mineral mix; poor drainage and standing water are the main causes of trouble. Water deeply but only when the soil has dried out completely, and keep the plant dry through winter, especially where it will experience cold. It tolerates light frost and brief freezes to around −9 °C (15 °F) when kept dry, but it is distinctly less cold-hardy than the northerly forms of A. parryi and needs protection or shelter in colder climates.
In pots, use a snug container and a gritty medium, and take care when handling — the sharp terminal spines and marginal teeth can cause injury. See Watering and Repotting for general technique.
Propagation
The easiest method is by offsets: mature rosettes readily produce pups around the base, which can be separated once they have a few roots and potted up individually. Allow any cut surface to callus before planting, and keep the young plant on the dry side until established. The species can also be grown from seed, though seed-grown plants take longer to reach display size. See the linked guides for full walkthroughs.
Common problems
- Rot — almost always from overwatering or a slow-draining mix; the base or crown softens and browns.
- Etiolation — too little light causes the rosette to stretch and lose its tight, symmetrical form.
- Agave snout weevil — a serious pest of larger agaves; the grub bores into the core, causing sudden collapse of the rosette.
- Pests — mealybugs and scale can shelter deep between the overlapping leaves; see Pests and diseases.
See also
- Agave — the genus overview
- Soil and potting mix · Watering · Repotting · Propagation — offsets · Pests and diseases