Hardy Hibiscus (Hibiscus moscheutos 'Blue River II') in the Hardy Hibiscuses Database

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
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
Fall
Suitable Locations: Bog gardening
Wildlife Attractant: Bees
Butterflies
Hummingbirds
Propagation: Seeds: Suitable for wintersowing
Sow in situ
Start indoors
Propagation: Other methods: Cuttings: Stem
Cuttings: Tip
Cuttings: Cane
Division
Pollinators: Various insects
Containers: Suitable in 3 gallon or larger

Image

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

Comments:
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
» 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
Weed? by luvsgrtdanes Jul 31, 2018 5:40 PM 17
What's Blooming - Photos and Chat. by NJBob Jun 16, 2019 12:27 PM 1,048
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
Ready for spring. by Horntoad Feb 3, 2016 8:10 PM 4
Hibiscus of the Day: Blue River II by Horntoad Sep 5, 2015 12:13 PM 4

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