American Thorow Wax

Bupleurum americanum

Native to:
Canada, Russia, United States

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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:
100 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
jun,jul,aug
Bloom Colors:
yellow

Garden & Ecology Notes

Wildlife Value:
pollinators
Deer Resistant:
Yes

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 — 60–90 days
Germination Time:
14–30 days
Notes:
Seeds benefit from cold-moist stratification and germinate best with light exposure at surface or shallow depth.

The above propagation data sourced from Claude AI