Abies durangensis Seeds | Durango Fir

Durango Fir (Abies durangensis) with flattened dark-green needles and a young cylindrical cone — Durango Fir (*Abies durangensis*): Pinaceae, a canyon fir of the Sierra Madre Occidental.

LATIN NAME: Abies durangensis

COMMON NAME: Durango Fir

Plant Profile

The Durango Fir is an evergreen conifer of the pine family from the high, sheltered canyons of the Sierra Madre Occidental in northwestern Mexico, where it forms forests with pines and oaks on cool, north-facing slopes between 2,000 and 3,000 metres. It reaches twenty-five to forty metres with a straight trunk and a narrow, spire-like crown of flattened, dark green needles that are blunt and grooved beneath. The cylindrical cones stand upright on the upper branches and disintegrate on the tree, leaving the naked spike that marks every fir.

Like its Mexican relatives it has a limited, fragmented distribution, confined to the canyon systems of two states, and its wild stands are sensitive to logging pressure and to the climate shifts pushing cool habitat upslope. In the wild it is a tree of steep, shaded ravines where moisture collects.

Science & Biotechnology

The Mexican firs are a systematist’s puzzle: a cluster of closely related, geographically isolated species on separate mountain ranges, whose boundaries have been tested with morphological data and increasingly with DNA sequencing, and A. durangensis sits at the centre of several of those questions. Ecological studies of the Sierra Madre’s pine-oak-fir forests, one of the most diverse conifer regions on earth, record the species as a component of the coolest, most sheltered canyon habitats, which are precisely the habitats most sensitive to warming. In cultivation it is rare, and the small amount of nursery stock traces to a few seed collections from the Durango mountains.

For the collector, that scarcity is part of the interest: this is a species more often seen in species lists than in gardens, and every seed-grown plant documents its own provenance.

Uses & Benefits

Its garden use is as a rare, fine-textured fir for cool, humid climates: a narrow, spire-like conifer whose flattened needles give a softer look than most firs, suited to an arboretum, a large garden with room, or a cool mountain garden where its canyon origin finds an echo. It resents hot, dry summers and wants its root run cool.

In its native canyons it contributes to mixed conifer timber and to the cool, moist habitat that supports a rich community of birds, mammals and epiphytes; most of its present value is ecological and scientific rather than commercial, which makes well-documented seed sources worth seeking out.

Growing from Seed

Give the seed six weeks of cold, moist stratification, then sow in spring into a free-draining, humus-rich compost, covering thinly and keeping the tray cool, bright and evenly moist. Germination is fair within three to four weeks. Grow the seedlings in airy half shade, protecting them from both drought and waterlogging.

Pot on deep and line out for two or three seasons, then plant out in autumn into deep, moist, free-draining soil with a cool root run and a light crown. Water through the first three summers, mulch annually with bark or leaf mould, and give it shelter from hot, drying winds.

Our Take

A canyon fir from the Sierra Madre, soft-needled and spire-like, rare in the wild and scarcely known in cultivation. A collector’s conifer for cool, moist gardens.

Tree Seeds