Northern Willowherb

Epilobium septentrionale

Northern Willowherb

Jennifer Wheeler, BLM Arcata

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Onagraceae
Genus:
Epilobium
Species:
Epilobium septentrionale

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
6 in - 1 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
aug, sep, oct, nov
Bloom Colors:
Red, Orange
Ground Cover:
Yes

Native Range

United States: California

Host Plant for Caterpillars

Heliodines extraneella, White-lined sphinx moth (Hyles lineata)

Soil Requirements

Soil Type:
moist, well-drained sandy loam
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
consistently moist
Notes:
prefers riparian zones and stream banks