American Thorow Wax

Bupleurum americanum

Native to:
Canada, Russia, United States

📍 View on iNaturalist →

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Apiaceae
Genus:
Bupleurum
Species:
Bupleurum americanum
USDA Symbol:
BUAM2

Growth Characteristics

Life Cycle:
Annual
Growth Habit:
Forb/herb
Height:
90 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
jun,jul,aug
Bloom Colors:
yellow

Wildlife Benefits

Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)

Garden & Ecology Notes

Wildlife Value:
butterflies

Soil Requirements

Soil Type:
well-drained, rocky or sandy soil
pH:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
typically found in open, rocky areas

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–30 days
Notes:
Seeds benefit from cold stratification for 30-60 days to break dormancy.