Common Pricklyash

Zanthoxylum americanum

Native to:
Canada, Mexico, United States

📍 View on iNaturalist →

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Rutaceae
Genus:
Zanthoxylum
Species:
Zanthoxylum americanum
USDA Symbol:
ZAAM

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Shrub , Tree
Height:
600 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
apr,may
Bloom Colors:
yellow, green
Landscaping Shrub:
Yes

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)
Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)
Caterpillars:
★★☆☆☆ Recorded caterpillar host plant (HOSTS Database)

Host Plant for Caterpillars

Agonopterix nigrinotella, Dichomeris citrifoliella, Fall webworm (Hyphantria cunea), Eastern Tiger Swallowtail (Papilio glaucus), Giant Swallowtail (Papilio cresphontes), Spicebush Swallowtail (Papilio troilus)

Reported Fauna Sightings

Butterflies:Eastern Giant (Heraclides cresphontes), Giant Swallowtail (Papilio cresphontes)

Garden & Ecology Notes

Wildlife Value:
birds, butterflies, small mammals
Deer Resistant:
Yes
Fragrant:
Yes
Fall Color:
yellow
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts vigorously from root crown following fire or cutting. Forms thickets through root suckering.

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
consistently moist
Notes:
Prefers fertile soils in woodland settings

Propagation & Germination

Stratification:
Warm then cold/moist stratification (double dormancy) — 60–120 days
Germination Time:
30–180 days
Notes:
Double dormancy requires warm stratification followed by cold stratification. Germination can be erratic and slow.

The above propagation data sourced from Claude AI

Pre-treatment: Seeds are cold stratified for 120 days

Establishment: Z. americanum is found within temperate deciduous forests of North America.

Source: npn.rngr.net