Flower of an Hour (Hibiscus trionum) in the Hibiscus Database

Common names:
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General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Dry
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Plant Height: 20-32 inches (50-80 cm)
Plant Spread: 12 inches (30 cm)
Fruit: Other: 5 valve brown capsule resembling little paper lanterns, each containing numerous, small dark brown to black kidney shaped seeds.
Fruiting Time: Late summer or early fall
Flowers: Showy
Flower Color: Bi-Color: petals are white/pale yellow w/ purple base
Bloom Size: 1"-2"
Flower Time: Late spring or early summer
Summer
Late summer or early fall
Fall
Uses: Will Naturalize
Edible Parts: Leaves
Eating Methods: Raw
Cooked
Wildlife Attractant: Bees
Butterflies
Hummingbirds
Propagation: Seeds: Days to germinate: 10 - 14 days
Depth to plant seed: Lightly cover the seeds with soil.
Sow in situ
Start indoors
Can handle transplanting
Propagation: Other methods: Cuttings: Stem
Cuttings: Tip
Cuttings: Cane
Pollinators: Self
Various insects
Containers: Suitable in 3 gallon or larger

Image

Hibiscuses of the Continental United StatesHibiscuses of the Continental United States
August 31, 2015

Many people are familiar with our native Hibiscus moscheutos. It is the source of many of the cultivars sold as Hardy Hibiscus, but there are many other species that grow here in the United States. Here is a look at the species that grow wild in the Continental United States.

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Flower of an Hour (Hibiscus trionum) was a featured
Plant of the Day for September 16, 2015.

Photo gallery:
Location: Jefferson County, TexasDate: August 31, 2015
By Horntoad
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Location: West Valley City, UTDate: 2013-07-16
By Zencat
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Location: central IllinoisDate: 2017-10-03
By jmorth
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Location: At a nurseryDate: Jul 27, 2008 12:39 PM
By Calif_Sue
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Location: central IllinoisDate: 10-8-13
By jmorth
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Location: central IllinoisDate: 2012-10-27
By jmorth
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Location: Tabby's GardenDate: 2012-08-13
By tabby
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Location: central IllinoisDate: 2013-10-08
By jmorth
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Location: Indiana  Zone 5Date: 2008-07-23
By gardengus
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Location: Tabby's GardenDate: 2012-08-13
By tabby
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Location: Indiana  Zone 5Date: 2012-08-29
By gardengus
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Date: 2005-07-24Taken by Bogdan Giuşcă in Herăstrău, Bucharest, Romania
By SongofJoy
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Location: West Valley City, UTDate: 2013-07-16
By Zencat
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Location: central IllinoisDate: 2016-09-18
By jmorth
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Location: Tabby's GardenDate: 2012-08-13
By tabby
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Location: central IllinoisDate: 2012-10-27
By jmorth
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Location: West Valley City, UTDate: 2013-07-11
By Zencat
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Location: West Valley City, UTDate: 2013-07-11
By Zencat
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Location: West Valley City, UTDate: 2013-07-16
By Zencat
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Location: West Valley City, UTDate: 2013-07-23
By Zencat
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Location: West Valley City, UTDate: 2013-07-23
By Zencat
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Location: central IllinoisDate: 2013-10-07
By jmorth
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Location: central IllinoisDate: 2013-10-07
By jmorth
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Location: central IllinoisDate: 2014-09-27
By jmorth
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Location: West Valley City, UTDate: 2015-08-12Showing red on the stem.
By Zencat
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Location: central IllinoisDate: 2016-09-18
By jmorth
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Comments:
Posted by jmorth (central Illinois) on Oct 29, 2012 4:04 AM

A common wildflower/weed in central and northern Illinois. Introduced from Europe as an ornamental. Each bloom (white/pale yellow w/ a purple base) lasts but a few hours.
Self-seeds prolifically; seeds can remain viable in the soil for years. Plant is pollinated by bumble bees primarily. Caterpillars of the Checkered Skipper, Grey Hairstreak, and Painted Lady find them quite munchable. Common Illinois habitats are croplands, field edges, roadsides, railroad right of ways, gardens, vacant sites, and construction sites. Plant has an interesting calyx.

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Posted by gardengus (Indiana Zone 5b) on Nov 13, 2011 6:06 PM

Considered a weed/wildflower here. I find it pretty enough to leave a few in the garden even if the flower stays open for only a short time.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Flower ID please by EddyFade Mar 20, 2018 8:12 PM 4
Is this a weed? by Colorado26 Jul 27, 2017 2:47 PM 6
Summer 2017 Hibiscus Discussion by Horntoad Nov 19, 2017 4:24 PM 23
ID volunteer plant by PatP38 Oct 21, 2016 12:34 PM 5
Wildflower or weed by frankrichards16 Sep 16, 2016 2:28 PM 4
help to ID these 2 flowers by Agoo Aug 27, 2016 7:30 PM 1
Are these weeds? by Kvent42 Jul 29, 2016 1:55 PM 3
Blooming Now by Horntoad Jun 2, 2016 2:01 PM 6
Seeds Showing their first signs of Life by jimard8 Mar 2, 2016 7:57 AM 15
of the Day: Flower Of An Hour (Hibiscus trionum 'Simply Love') by Horntoad Feb 4, 2016 6:01 PM 0

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