Common Pricklyash
Zanthoxylum americanum
- Native to:
- Canada, Mexico, United States
A. Barra






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