Whitethorn Acacia

Vachellia constricta

Native to:
Mexico, United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Fabaceae
Genus:
Vachellia
Species:
Vachellia constricta
USDA Symbol:
VACO9

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Shrub , Tree
Height:
300 cm
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
apr,may,jun,jul,aug,sep
Bloom Colors:
yellow
Landscaping Shrub:
Yes

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)

Garden & Ecology Notes

Wildlife Value:
bees, birds, small mammals
Deer Resistant:
Yes
Fragrant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts from root crown following fire; typical of Chihuahuan Desert shrublands with periodic fire regimes.

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
6.0 - 8.0 (neutral to slightly alkaline)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to arid desert regions

Propagation & Germination

Stratification:
None required
Scarification:
Seed coat scarification required before sowing
Germination Time:
7–30 days
Notes:
Scarification of hard seed coat required; hot water treatment or mechanical scarification improves germination rates significantly.

The above propagation data sourced from Claude AI

Pre-treatment: Scarify the hard coating on seeds by applying boiling water and letting them soak for 3-24 hours. Alternatively, mechanical scarification by sandpaper or nicking followed by hot water can be used.

Establishment: Whitethorn acacia occurs from 2,500 to 5,000 feet in shallow caliche soil on dry slopes and lowlands. It flowers from May-November.

Source: npn.rngr.net