Dog Fennel (Eupatorium capillifolium) in the Eupatoriums Database

Common names:
Give a thumbs up Dog Fennel
Give a thumbs up Dogfennel

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Minimum cold hardiness: Zone 5b -26.1 °C (-15 °F) to -23.3 °C (-10 °F)
Maximum recommended zone: Zone 10b
Plant Height: 36 - 84 inches
Plant Spread: 12 - 24 inches
Leaves: Fragrant
Fruit: Showy
Flowers: Inconspicuous
Flower Color: White
Bloom Size: Under 1"
Flower Time: Late summer or early fall
Suitable Locations: Xeriscapic
Uses: Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Propagation: Seeds: Self fertile
Sow in situ
Can handle transplanting
Propagation: Other methods: Cuttings: Tip
Pollinators: Various insects
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots


Posted by flaflwrgrl (North Fl. - Zone 8b) on May 6, 2012 5:35 PM

An extremely fast growing plant most often found in cow pastures, disturbed land & along roadsides. It has a quite pungent odor when touched & the odor will stay on your clothing or skin until you wash. It is not an especially unpleasant odor but not a sweet scent either.
CAUTION: This volunteers freely & most people consider this a highly invasive plant. It grows very aggressively.
It can be very pretty & graceful to look at with it's fine foliage.
When growing in cow pastures the cows eat around this plant because it contains liver-damaging pyrrolizidine alkaloids. This is why the scarlet bodied wasp moth, Cosmosoma myrodora, feed on Dogfennel; they store the toxins in it & that helps them ward off prey.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Mystery Plant? by SnazzyGator Nov 24, 2018 1:19 PM 5
ID on plant in flower garden? by nickram44 Jul 9, 2018 7:47 AM 2
plant for ID please by Muddy1 Jun 26, 2017 2:03 PM 4
What is this weed? by IJsbrandtGA Aug 5, 2016 6:55 AM 12
Plant id request by LynneHTx Nov 16, 2015 12:49 PM 3
Tall weed growing next to my horseweed by frankrichards16 Aug 17, 2015 2:53 PM 3
Dog Fennel (Eupatorium capillifolium) by Kabby May 13, 2015 8:54 PM 6
wild weed ID help please by chickhill Sep 11, 2014 9:40 PM 4
ID please by flaflwrgrl May 6, 2012 6:33 PM 25
another growing wild ID by gingin Oct 31, 2011 6:59 PM 7

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