PlantsHardy Hibiscuses→Hibiscus (Hibiscus moscheutos 'Blue River II')

Common names:
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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
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 10b
Plant Height: 4-6 feet
Plant Spread: 2-3 feet
Leaves: Deciduous
Flowers: Showy
Flower Time: Summer
Late summer or early fall
Suitable Locations: Bog gardening
Wildlife Attractant: Bees
Propagation: Seeds: Suitable for wintersowing
Sow in situ
Start indoors
Propagation: Other methods: Cuttings: Stem
Cuttings: Tip
Cuttings: Cane
Pollinators: Various insects
Containers: Suitable in 3 gallon or larger
Child plants: one child plant


'Blue River II' was a featured
Plant of the Day for September 3, 2015.

Posted by lovesblooms (Maryland - Zone 7a) on Sep 3, 2015 10:59 AM

The main thing I don't like about hibiscus flowers is the red eye. It's not that it's ugly, it's just so commonplace with lighter colored hibiscuses--and it reminds me of Rose of Sharon, which are even more common here.

I winter sowed three of these last year from open-pollinated seed I was fast enough to grab in a group swap, and they all sprouted. Although they attempted to grow, I wasn't attentive enough to keeping away the groundhogs and deer, and they kept being chewed back. This year, though, I was much more protective--and also anxious to discover whether they would come true from seed. I was very excited when the first bloom opened pure white! I got a beautiful show from June to July. I may have gotten a longer bloom if I watered more regularly when we hit a dry spell through July, but I was happy with what I got. I did not spray these but had no rust, although some Lady Baltimore offspring (didn't come true to color) nearby did rust somewhat, in shadier conditions, and I worried it could spread.

They're still out there, getting watered more regularly, although I don't really expect more blooms. Can't wait till next year!

[ Reply to this comment | Give a thumbs up ]

Posted by Horntoad (Nederland, Texas - Zone 9a) on Sep 2, 2015 3:53 PM

Blue River II is named after the Blue River in Oklahoma where its parent plant was found.

[ 1 reply | Give a thumbs up ]

Plant Events from our members
lovesblooms On July 13, 2015 Bloomed
True from seed!
lovesblooms On April 20, 2015 Plant emerged
from 2014 seedling; will update whether blooms are true from seed
Horntoad On July 13, 2016 Bloomed
tabbycat On May 20, 2020 Miscellaneous Event
2020 plant is 3'
tabbycat On July 2, 2019 Miscellaneous Event
Plant is 3' tall
tabbycat On April 1, 2019 Plant emerged
Died back in Fall has emerged with more than one stalk.
antsinmypants On May 7, 2021 Plant emerged
antsinmypants On February 25, 2021 Seeds sown
WS 8 in jug 30.
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Duplicate? by Bonehead Aug 19, 2017 11:25 AM 5
Trading 'Lemon Queen' Sunflower & 'McKana' Columbine by mamabear49093 Jul 24, 2021 4:46 AM 1
What is it? Green Spring Gardens, Alexandria, Virginia by Nick_Kurzenko Jun 27, 2021 8:26 AM 5
Weed? by luvsgrtdanes Jul 31, 2018 5:40 PM 17
What's Blooming - Photos and Chat. by NJBob Dec 1, 2021 12:17 PM 5,206
White Flower Border by evelyninthegarden May 13, 2019 11:19 PM 88
What's Blooming 2017 - Photos and Chat. by NJBob Jan 1, 2018 8:14 PM 1,563
2017 orders by Lestv Sep 18, 2017 10:45 AM 1,756
Summer Hibiscus Discussion by Horntoad Sep 22, 2016 6:01 PM 107
June Blooms by Horntoad Jul 13, 2016 11:12 AM 49
What's Blooming 2016 - Photos and Chat. by NJBob Dec 31, 2016 10:07 PM 1,927

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