Blue Mistflower (Conoclinium coelestinum)

Common names:
Give a thumbs up Blue Mistflower
Give a thumbs up Wild Ageratum

Botanical names:
Conoclinium coelestinum Accepted
Eupatorium coelestinum Synonym

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Wet Mesic
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 9b
Plant Height: 12 - 36 inches
Plant Spread: 6 - 12 inches
Flowers: Showy
Flower Color: Blue
Bloom Size: Under 1"
Flower Time: Summer
Late summer or early fall
Underground structures: Rhizome
Uses: Groundcover
Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Propagation: Seeds: Stratify seeds: Two months cold moist treatment
Depth to plant seed: Seed is small. Sow on soil surface.
Suitable for wintersowing
Can handle transplanting
Other info: This plant self seeds.
Propagation: Other methods: Cuttings: Tip
Pollinators: Beetles
Moths and Butterflies


What's Blooming in November:  A Call for Photos from Warm Climate GardenersWhat's Blooming in November: A Call for Photos from Warm Climate Gardeners
November 15, 2011

Here at Cottage-in-the-Meadow Gardens, our outdoor gardens are in their last-hurrah stage as frost creeps across the landscape. As you'll see, there are still a few hardy stragglers outdoors, but for the most part, our gardens have been put to bed for the coming winter. This time of year presents a perfect opportunity for gardeners in warmer climes to show us what's blooming in their gardens. Floridians, Californians, Aussies, Kiwis, gardeners anywhere in the Southern Hemisphere or the southern reaches of the Northern Hemisphere, show us your blossoms! I'll publish as many photos as time and space allow.

(Full article44 comments)
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This plant is tagged in:

Posted by Catmint20906 (Maryland - Zone 7a) on Aug 2, 2014 7:55 PM

Conoclinium coelestinum is a nectar source for monarchs and other butterflies, and is a plant option for Monarch Way Stations.

According to NPIN, this plant also has special value to native bees, and supports conservation biological control by attracting beneficial insects to the garden.

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Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Feb 16, 2018 9:43 PM

I occasionally see this lower perennial in gardens. It is a native plant growing in upland sites as in woodland edges or in low moist sites from Missouri to New Jersey down deep into the South. This plant spreads a lot by rhizomes to become a colony or groundcover and can be aggressive in gardens invading around other plants. It is slow to come up in the spring. Some are sold by most conventional nurseries and some by many native plant nurseries.

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Posted by jmorth (central Illinois) on Sep 7, 2015 1:46 PM

A showy wildflower in Illinois, blooming late summer into the fall. Flower heads found at the tops of branching stems are flat-topped clusters of blue, or maybe purple. Each flower head has between 35 and 70 individual disk flowers. Leaves are opposite and toothed at edges. Plant can spread by underground runners. Its favored habitat is moist ground by streams; also found by ditches and low pasture areas. Common in the bottom 2/3 of the state.
When viewed from a distance, may look like a low-lying foggy mist.
I've found it in the fall near woods, in woods, and next to creeks along the Mississippi River.

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Plant Events from our members
piksihk On November 1, 2014 Bloomed
Catmint20906 On June 13, 2015 Obtained plant
MrsBinWY On June 24, 2018 Potted up
10 pots
MrsBinWY On February 24, 2018 Seeds sown
WS in milk jug; lots of seeds from docmom
MrsBinWY On January 2, 2016 Seeds sown
WS 16 seeds from docmom; seeds germinated well; seedlings were potted up; I failed to water them after I planted them out. Try again.
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Identity the Flower by firgitaz Jan 21, 2019 10:27 PM 10
Flower that my Mom and Grandmom had by GrandpoppyJack Oct 24, 2018 2:38 PM 6
Need help identifying this wild plant. by Hodgepodge204 Sep 9, 2018 3:41 PM 3
Transplanting wild Blue Mist flowers. by armyvet2013 May 18, 2018 11:06 AM 13
Perennials for galvanized tubs by Jackiedavis87 Feb 21, 2017 5:07 PM 3
Anyone recognize this one? by plantladylin Feb 10, 2017 1:57 PM 11
blogs ? by upat5 Dec 18, 2016 8:21 PM 10
What is this by mad_science Oct 10, 2016 10:08 PM 3
Wildflower or Weed? by GardenGoober Sep 28, 2016 2:28 PM 6
Help with plant ID by ScottD Sep 20, 2016 10:30 PM 4

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