General Plant Information (Edit)
Plant Habit: Herb/Forb
Sun Requirements: Partial or Dappled Shade
Partial Shade to Full Shade
Water Preferences: Wet
Wet Mesic
Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Plant Height: male plants are 1.5 to 2 feet tall; female plants grow to 4 feet
Flowers: Showy
Flower Color: White
Yellow
Flower Time: Summer
Underground structures: Taproot
Uses: Groundcover
Medicinal Herb
Will Naturalize
Propagation: Other methods: Cuttings: Root
Division
Pollinators: Various insects
Miscellaneous: Dioecious

Image
Common names
  • Stoneroot
  • Citronella
  • Heal-all
  • Snakeroot
  • Stonewort
  • Canadian Horse Balm
  • Citronella Horsebalm

Photo Gallery
Location: St Louis   Missouri Botanical Garden
Date: 2023-09-15

Darrel Hess /  http://bioimages.vanderbilt.edu/hessd/e5242
Location: Sadsbury Preserve near Coatesville, PA
Date: 2015-08-21
single plant with old inflorescence
Location: Sadsbury Preserve near Coatesville, PA
Date: 2015-08-21
a patch in the woods
Location: Sadsbury Preserve near Coatesville, PA
Date: 2015-08-21
top of plants
Location: Sadsbury Preserve near Coatesville, PA
Date: 2015-08-21
end of bloom of inflorescence
Location: Sadsbury Preserve near Coatesville, PA
Date: 2015-08-21
yellowish flowers
Location: Crows Nest Preserve in southeast Pennsylvania
Date: 2020-09-18
group of plants along forest edge
Location: Crows Nest Preserve in southeast Pennsylvania
Date: 2020-09-18
plant at end of blooming
Location: Crows Nest Preserve in southeast Pennsylvania
Date: 2020-09-18
flowers at end of blooming time; leaves
Location: Skaneateles Conservation Area
photo credit: R. A. Nonenmacher

Darrel Hess /  http://bioimages.vanderbilt.edu/hessd/e5242
Location: Skaneateles Conservation Area
photo credit: R. A. Nonenmacher
Location: Skaneateles Conservation Area
photo credit: R. A. Nonenmacher
Location: Skaneateles Conservation Area
photo credit: R. A. Nonenmacher

photo by H. Zell
Comments:
  • Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Feb 25, 2018 8:32 PM concerning plant:
    I've seen Canadian Horse-Balm in several moist woodland spots in southeast Pennsylvania. It is a very nice-looking perennial. This member of the Mint Family has flowers with a lemon scent as do the crushed leaves. The leaves can be brewed for a tea. The rhizome roots have been used to treat urinary and kidney ailments and as other homeopathic medicine. Its native range is from southwest Quebec & New England through southeast Ontario into Wisconsin down into Louisiana over into Florida.

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