General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Maximum recommended zone: Zone 9b
Flower Color: Pink
Flower Time: Summer
Late summer or early fall
Propagation: Seeds: Self fertile
Pollinators: Various insects

Common names
  • Western snakeroot
  • Western thoroughwort
Botanical names
  • Accepted: Ageratina occidentalis
  • Synonym: Eupatorium occidentale

Photo Gallery
Location: Regional Parks Botanic Garden, Berkeley, CA
Photo by John Rusk
Location: Regional Parks Botanic Garden, Berkeley, CA
Date: 2012-06-23
Photo by John Rusk

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