Hibiscus Species, Bladder Hibiscus, Flower of an Hour, Venice, Venus Mallow
Hibiscus trionum
Family: | Malvaceae (mal-VAY-see-ee) (Info) |
Genus: | Hibiscus (hi-BIS-kus) (Info) |
Species: | trionum (try-OH-num) (Info) |
Height:
24-36 in. (60-90 cm)
Spacing:
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Hardiness:
Not Applicable
Sun Exposure:
Full Sun
Bloom Color:
Scarlet (dark red)
Bright Yellow
Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall
Foliage:
Succulent
Other details:
May be a noxious weed or invasive
Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information:
Non-patented
Propagation Methods:
From seed; sow indoors before last frost
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Foliage Color:
Bloom Characteristics:
This plant is attractive to bees, butterflies and/or birds
Water Requirements:
Average Water Needs; Water regularly; do not overwater
Where to Grow:
Regional
This plant is said to grow outdoors in the following regions:
Atwater, California
Fairfield, California
Merced, California
San Jose, California
Stockton, California
Canon City, Colorado
Denver, Colorado
Rifle, Colorado
Dunnellon, Florida
Demorest, Georgia
Buhl, Idaho
Cherry Valley, Illinois
Hinsdale, Illinois
Kansas, Illinois
Westchester, Illinois
Flora, Indiana
Bloomfield, Iowa
Nichols, Iowa
Barbourville, Kentucky
Ewing, Kentucky
Frederick, Maryland
Pikesville, Maryland
Bridgewater, Massachusetts
Waltham, Massachusetts
Erie, Michigan
Lewisville, Minnesota
Minneapolis, Minnesota
Belton, Missouri
Neosho, Missouri
Graham, North Carolina
Cincinnati, Ohio
Columbia Station, Ohio
Fremont, Ohio
Glouster, Ohio
Lynchburg, Ohio
Sandusky, Ohio
Yukon, Oklahoma
Portland, Oregon
Salem, Oregon
Allentown, Pennsylvania
Dover, Pennsylvania
Newtown Square, Pennsylvania
Pottstown, Pennsylvania
Schnecksville, Pennsylvania
Mc Kinney, Texas
Zapata, Texas
Earlysville, Virginia
Muscoda, Wisconsin
South Milwaukee, Wisconsin
show allGardeners' Notes:
Rating | Content |
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Neutral | On Sep 4, 2015, 49erfan33 from Yukon, OK wrote: I'm in Oklahoma and I was surprised to see this pop up in our small strawberry patch the first year. The plant/weed grows quickly and I'm probably too late to keep it from seeding. |
Neutral | On Mar 9, 2014, jillwozhere from Perth, I live near Perth Australia and I just noticed this plant in my veggie garden yesterday. I didn't recognise the leaves and decided to wait for the flower. I didn't have to wait long, as it flowered the very next day! Still I did not know this plant, so searched for it online by description. At first I was quite delighted by this pretty little flower, but now I have to be worried as it sounds like hard work if I keep it. I guess I'll have to pull it out. I wonder where the seed came from? Years ago I added soil mix to the yard, but since have been using my home made compost. I did add some bentonite clay last year, but previous to the veggie garden the area was just lawn. I've lived on my rural property for 30 years and never seen this flower until today... pity it goes crazy. |
Neutral | On Jul 18, 2013, sharilynncammac from Buhl, ID wrote: hmmmmm, not sure-pretty little wildflower or evil multiplying weed. I just don't know what to do next with mine. In Buhl, Idaho. |
Positive | On Sep 23, 2012, JDahmer2 from Waltham, MA wrote: I found the Flower of the Hour, or Venice Flower at our job site in Wayland, Massachusetts. I think that it is a neat flower. Never seen one before. I dug it up, just in time. The concrete truck dumped it's excess of concrete in the spot this plant was growing in. I have it on my balcony. |
Positive | On Sep 10, 2009, Jaketheplantman from Dover, PA wrote: I just found this plant growing near one of my flower Garden's. At first i thought it was a Mallow Musk because of the leave's. I Transplanted it in a pot and move it to my Green House. One day it flowered and was surpise. The plant wasn't a Mallow Musk but a Flower of and Hour. Now i readed other People's Opinion about the plant and they call it a weed and i know this plant will spread by seed. But if you take the time to cut the spent flower heads it can't spread. And doesn't a Columbine do the same if you leave the flower heads on. So really I think its a neat plant to add with the rest of my Garden and to the Mallow Family Plants like Rose Mallow, Large Mallow, HollyHocks and Marsh Mallow. All i also have seeds that i collected form another plant that i found Transplanted in my gar... read more |
Negative | On Jun 29, 2009, quasymoto from Bloomfield, IA (Zone 5b) wrote: As an avid gardener (veggies and flowers) I have fought for years to YANK these out of my gardens where my veggies grow. I guess I never notice it anywhere else in the yard and or flower gardens. But this can and will take over, but a good tiller w/plenty of horse power keeps the buggers from even getting more than a few leaves on. |
Neutral | On Sep 29, 2008, ChemicalFlux from Minneapolis, MN wrote: I have never seen this plant before this summer. We brought home a truck-load of dirt to do some landscaping and I believe that this seed was brought to our yard through the black dirt we laid. It has only started to grow where we laid the new dirt. |
Negative | On Jun 22, 2008, CountryGardens from Lewisville, MN (Zone 4a) wrote: I can't believe this weed is even listed here. It is terrible! The only good is when soybean aphids arrive, it is the first plant they attack. Then when you are pulling them, you get nice sticky goo all over you! |
Negative | On Jan 28, 2006, Equilibrium wrote: Indigenous to Europe, Flower Of An Hour loves disturbed areas and flourishes in them. This plant will probably end up on noxious weed lists sooner or later at the rate I'm seeing them pop up here there and everywhere. The flowers aren't even that showy and they aren't open all that long. Perhaps around a half hour early in the morning and after that all you get to see is scraggly foliage sprawled out over the ground. Good thing is that it is an annual so if you keep pulling it up, sooner or later you'll beat back the seed bank. |
Negative | On Oct 30, 2005, aasplus from Lordstown, OH (Zone 5a) wrote: I'm with JEFE. I had never seen this plant until after we had our sewer line put in. I must admit I think the flower is beautiful, I have seen many of them bloom, each time I made a mental note and tried to find out what it was. After 4 years I found it on the internet with many warnings, it is an invasive weed. The seeds came be dormant for 50 years the are where these started to grow had not been touched in 23 years so crunch those numbers. All it took was the rain and a little sun and they invaded like Atilla the Hun. I just found out they were a weed today but I sort of knew that several years ago when they came out like gangbusters. The flowers bloom quickly but the seeds grow and spread quicker. The name is Venice Mallow (Flower of an hour) (Hibiscus trionum) I found the info on Wee... read more |
Positive | On Sep 6, 2005, jansong from South Hadley, MA (Zone 5b) wrote: One plant came up in my garden outside of Philadelphia, PA this summer and it has taken weeks for me to identify it. Maybe it will become the invasive problem that others write about, but this beautiful flower is a joy the few hours it comes out. |
Negative | On Dec 30, 2004, JefeQuicktech from Moorhead, MN (Zone 4a) wrote: I have a tough time considering Canada Thistle as a weed. However, Flower Of An Hour, Venice Mallow Hibiscus trionum is a WEED. It is not just invasive in our garden it is EVIL, bad, malo, muy malo, inicuo. |
Positive | On Jun 25, 2004, DiOhio from Corning, OH (Zone 6a) wrote: I love this flower. We have it wild here in SE Ohio. One year it came up in one of my flowerbeds and I've left it reseed year after year. |
Positive | On Apr 5, 2004, nansgarden2 from Silt, CO (Zone 4a) wrote: Bladder Hibiscus or Flower of the Hour. |
Positive | On Sep 3, 2003, henkmaters2 wrote: We bought seeds for this plant in New Zealand and it has grown over two meters high! As of September 2003, it's still pushing and flowering. |
Negative | On Jul 20, 2002, lupinelover from Grove City, OH (Zone 6a) wrote: Plant self-sows prodigously and apparently the seeds can survive in the ground for many years, waiting for the correct conditions to germinate. |