Hibiscus forum: hardy hibiscus

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Name: Treah
Vermont (Zone 5a)
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treah
Sep 21, 2019 6:00 AM CST
"Blue Hawaii"
Thumb of 2019-09-21/treah/7900a4

Name: Eric
Hawthorne, fl (Zone 9a)
Bee Lover
Miamiu
Sep 21, 2019 11:42 AM CST
I am definitely looking at the blues. Do you know what the difference between this blue and other blues out there?
Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
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Horntoad
Sep 21, 2019 1:16 PM CST
This is a Rose of Sharon. Although it is hardy, it's not what most of us would think of as a Hardy Hibiscus.
wildflowersoftexas.com



Name: Diana
Southeast Missouri (Zone 6a)
Region: Missouri Enjoys or suffers hot summers Dog Lover Cat Lover Hibiscus Daylilies
Irises Vegetable Grower Canning and food preservation Plant Lover: Loves 'em all! Enjoys or suffers cold winters
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DraDiana
Oct 18, 2019 3:14 PM CST
It's a really nice Rose of Sharon!
Name: Keith
Long Island, NY (Zone 7a)
Aroids Daylilies The WITWIT Badge Lover of wildlife (Black bear badge) Annuals Spiders!
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keithp2012
Nov 8, 2019 4:05 PM CST
Do seedlings produce blue flowered offspring?
(Zone 6a)
Frillylily
Feb 20, 2020 11:29 AM CST
well Keith as I understand some of these 'new' hybrids do not produce viable seed, so there wouldn't be seedlings. Pros and Cons to that I suppose. I don't know about this one particularly though.
Name: Ken
Winston-Salem, NC (Zone 7b)
Daylilies & hardy hibiscus
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MrKGDickie
Mar 30, 2020 9:00 PM CST
DraDiana said:It's a really nice Rose of Sharon!


Hi, Diana! We know each other from the Daylily forum. This is my other obsession.

Last year, when an awesome NC nursery went belly-up, I bought a bunch of species hibiscus to top off my collection of coccineus, moscheutos, hybrids, et al.

Thus far, every potted hardy hibiscus shows new growth...except Hibiscus moscheutos var. Incanus. It may be late, or it may be dead. Only time will tell.

I (sadly) discovered that a couple of the species I purchased are more tree/shrub than hardy perennial. I mean that they seem to have once central trunk...which I lopped off...rather than branches or "canes" that die back. More like a H. syriacus (Rose of Sharon) than coccineus or moscheutos.

Does anyone grow H. 'Rubrum' AKA H. mutabilis 'Rubrum'? Can it survive me erroneously lopping off its trunk?
Hardy hibiscus are a hobby, but daylilies are an obsession.
Name: Diana
Southeast Missouri (Zone 6a)
Region: Missouri Enjoys or suffers hot summers Dog Lover Cat Lover Hibiscus Daylilies
Irises Vegetable Grower Canning and food preservation Plant Lover: Loves 'em all! Enjoys or suffers cold winters
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DraDiana
Mar 31, 2020 7:29 PM CST
Ken,
I found the following in the database under Hibiscus mutabilis "Rubrus":

Posted by mjsponies (Central Florida) on Jan 8, 2015 10:28 AM
I've had this for at least 6 years now. Grows in the lower part of the yard that generally stays fairly moist. No irrigation is available where it's planted, so if we don't get rain it's on its own. Gets full sun, 8+ hrs. a day. It's come back reliably from hard freezes ( zone 8b/9a). Blooms OK if we've been dry; fantastic if we've been getting usual rain. I don't ever fertilize them either. One of the few Hibiscuses I grow as I absolutely can't stand the white flies that Hibiscuses are noted for. These, for some reason, don't seem to be prone to them. There is some sort of moth caterpillar that likes to occasionally chew on the leaves, which I just pick off.
I love the big platter-shaped blooms. Fairly easy to root. Gets well over 6-7 ft. tall, but can be pruned down if you don't have that much room for them.
Name: Ken
Winston-Salem, NC (Zone 7b)
Daylilies & hardy hibiscus
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MrKGDickie
Apr 1, 2020 2:06 AM CST
Thanks, @DraDiana and @mjsponies.

I found more info local to me, from Plant Delights Nursery to the east of me. Seems that it's a woody shrub in milder climes, but hereabouts it's a dieback perennial.

My guess is that my remaining woody stem is the result of our super-mild 2019-2020 winter. This is good to know!
Thumb of 2020-04-01/MrKGDickie/edb554
Hardy hibiscus are a hobby, but daylilies are an obsession.
Name: Diana
Southeast Missouri (Zone 6a)
Region: Missouri Enjoys or suffers hot summers Dog Lover Cat Lover Hibiscus Daylilies
Irises Vegetable Grower Canning and food preservation Plant Lover: Loves 'em all! Enjoys or suffers cold winters
Image
DraDiana
Apr 1, 2020 6:38 AM CST
Good thing it grows from cuttings easily, since it's a sterile hybrid. Hopefully you'll get some photos to share of the whole plant in full bloom this summer, Ken.
Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
Image
Horntoad
Apr 1, 2020 8:43 AM CST
MrKGDickie said:Thanks, @DraDiana and @mjsponies.

I found more info local to me, from Plant Delights Nursery to the east of me. Seems that it's a woody shrub in milder climes, but hereabouts it's a dieback perennial.

My guess is that my remaining woody stem is the result of our super-mild 2019-2020 winter. This is good to know!
Thumb of 2020-04-01/MrKGDickie/edb554


I don't have 'Rubrum' but I have one that was sold to me as 'Terry's Pink' but that was an incorrect ID. Either way, it is of this hybrid type and it has frozen back a couple of years ago and the last couple of years has gone dormant but not frozen back. I was going to post about this being a cross between Hibiscus mutabilis and H. moscheutos, but I see you already found it. I have been trying to verify this info though other sources but have been unable to do so at this point. I have also seen it listed as a cross between H. mutabilis and H. paramutabilis, but that was years ago and new info is often found. Since it is supposed to be a "found" plant and not an intention cross we will probably not know for sure unless genetic testing is done. But in my opinion, I find the info on Plant Delights Page more plausible.

wildflowersoftexas.com



[Last edited by Horntoad - Apr 1, 2020 9:14 AM (+)]
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