Late Boneset (Eupatorium serotinum) in the Eupatoriums Database

Common names:
Give a thumbs up Late Boneset
Give a thumbs up Late-flowering Thoroughwort
Give a thumbs up Late-flowering Boneset
Give a thumbs up Lateflowering Thoroughwort
Give a thumbs up White Boneset
Give a thumbs up Thoroughwort

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Wet
Wet Mesic
Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 10b
Plant Height: 24 - 72 inches
Plant Spread: 18 - 30 inches
Flowers: Showy
Fragrant
Flower Color: White
Bloom Size: Under 1"
Flower Time: Late summer or early fall
Fall
Underground structures: Rhizome
Uses: Will Naturalize
Wildlife Attractant: Bees
Butterflies
Resistances: Deer Resistant
Rabbit Resistant
Flood Resistant
Propagation: Seeds: Stratify seeds: 3 months at 40 degrees
Suitable for wintersowing
Can handle transplanting
Propagation: Other methods: Cuttings: Tip
Pollinators: Various insects
Miscellaneous: Tolerates poor soil
Monoecious

Fall blooms are attractive to many pollinators and other flying i

Honey Bees in the Garden... AugustHoney Bees in the Garden... August
By Mindy03 on August 1, 2011

August is another hot month for both gardeners and honey bees. Water for plants and honey bees remains a top priority. You may also find the honey bees you encounter are more aggressive than they have been since spring. That's because they are anxious to store enough food to last the colony through the coming winter. Be careful when you bend to sniff a flower, a honey bee might be there and will think you are trying to get the nectar for yourself.

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Photo gallery:
Location: central IllinoisDate: 2011-09-11
By jmorth
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Location: central IllinoisDate: 2013-08-27
By jmorth
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Location: central IllinoisDate: 2013-09-02
By jmorth
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Location: Downingtown, PennsylvaniaDate: 2015-09-24lone plant in a wet meadow in bloom
By ILPARW
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Location: Downingtown, PennsylvaniaDate: 2020-09-14near a pond in wet soil in bloom
By ILPARW
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Location: Downingtown, PennsylvaniaDate: 2020-09-14close-up of flower clusters
By ILPARW
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Location: central IllinoisDate: 2013-08-27
By jmorth
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Location: central IllinoisDate: 2013-08-27
By jmorth
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Location: Macon GeorgiaDate: Septembernext to horse fence
By stone
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Location: Roberta GeorgiaDate: Septemberdouble trouble
By stone
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Location: central IllinoisDate: 2013-09-02
By jmorth
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Location: ILDate: 2016-09-19
By molanic
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Location: Romeoville, IllinoisDate: 2017-09-04planted in a landscape, in bloom
By ILPARW
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Location: central IllinoisDate: 2013-08-27
By jmorth
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Location: central IllinoisDate: 2013-08-28
By jmorth
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Location: central IllinoisDate: 2013-11-02
By jmorth
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Location: central IllinoisDate: 2014-09-27
By jmorth
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Photo courtesy of: Tom Potterfield
By admin
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Date: 2015-02-09Photo courtesy of: Tom Potterfield
By admin
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Photo courtesy of: Tom Potterfield
By admin
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Location: central IllinoisDate: 2013-09-02
By jmorth
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Location: central IllinoisDate: 9-2-13
By jmorth
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Location: central IllinoisDate: 9-11-11
By jmorth
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Location: central IllinoisDate: 2015-09-06
By jmorth
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Location: central IllinoisDate: 2015-10-21
By jmorth
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Location: central IllinoisDate: 2015-10-21
By jmorth
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Location: Downingtown, PennsylvaniaDate: 2015-09-24close-up of flower clusters
By ILPARW
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Location: Downingtown, PennsylvaniaDate: 2016-09-05several plants in bloom in a wet meadow
By ILPARW
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Location: Downingtown, PennsylvaniaDate: 2016-09-05the foliage
By ILPARW
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Location: Millersville MDDate: 2020-09-05Typical bug damage on young plant
By sallyg
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Comments:
Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Feb 16, 2018 9:27 PM

Late Thoroughwort is a common native plant in wet meadows and bottomlands from Wisconsin & Minnesota to New Jersey and way southward in the US. It grows about 3 to 6 feet high and is a big perennial. It has sharp spearhead-like leaves with long leaf stalks (petioles). Its white flower clusters bloom in September & October and are loved by bees, wasps, butterflies, beetles and other pollinators and smell good, fragrant. In fact it is such an excellent late season pollination plant that is constantly busy with beneficial insects. I saw some planted at a foundation native plant landscape of Isle a la Cache Museum in Romeoville, Illinois, where they were making good tall perennials in average, mesic soil. (As far as I can tell, it probably is one of those perennials that does not ever need dividing because of the center of the plant dying out or the plant getting too big and thick.) Its root system is fibrous and it also forms rhizomes (underground stems) so it can spread by them. Some report that it can be an aggressive perennial for the regular garden; others not. One person reported that it was invasive in a pasture and he did not want it because the foliage is bitter and not good for livestock or mammals to be eating. It is sold by some native plant nurseries, as Izel in MD, Prairie Moon in MN, and EcoBlosom in TX.

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Posted by sallyg (central Maryland) on Sep 5, 2020 12:47 PM

Very common in central Maryland waste places and roadsides. Can self sow in a casual garden. Smells like vanilla to me. Watch out for new plants, can be overabundant if you let some go to seed.

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Posted by Mindy03 (Delta KY) on May 11, 2012 4:52 PM

Honey bees get nectar from this plant which produces a light amber honey.

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Posted by jmorth (central Illinois) on Aug 28, 2013 8:31 AM

Habitat range - open moist woods, prairies, pastures, disturbed areas and old fields.
Common wildflower in Illinois.
Blooms August - October. Butterflies and bees (also wasps) attracted to plant.

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Discussion Threads about this plant
Thread Title Last Reply Replies
What is this? by irvisscott Jun 2, 2020 6:43 AM 12
ID this common wildflower? by Spencerjc63 Aug 30, 2019 3:18 PM 2
Is It Toxic? by emigodwin Aug 12, 2019 3:57 PM 1
plant ID by radagastoff Aug 2, 2019 10:02 AM 3
2019 Chicagoland Annual Plant Swap! by pitimpinai Apr 29, 2020 8:59 AM 198
Weed or Not? by IJsbrandtGA Dec 31, 2018 8:15 AM 5
Help ID this plant by sterlinggold Aug 13, 2017 1:34 PM 2
Chicagoland Annual garden swap 2017 by oerickson Aug 25, 2017 10:41 AM 303
September 2016 Butterflies, Moths & Larva by mellielong Oct 1, 2016 8:12 AM 650
Chicagoland garden swap 2016 by oerickson Apr 8, 2017 1:31 PM 206

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