Photo by Melody

PlantFiles: Hardy Hibiscus, Rose Mallow, Swamp Mallow
Hibiscus moscheutos 'Plum Crazy'

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: moscheutos (mos-KEW-tos) (Info)
Cultivar: Plum Crazy
Additional cultivar information: (PP11854)
Hybridized by Zwetzig/Fleming; Year of Registration or Introduction: 1999

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4 vendors have this plant for sale.

9 members have or want this plant for trade.

36-48 in. (90-120 cm)

24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun

Bloom Color:

Bloom Time:
Mid Summer
Late Summer/Early Fall
Blooms repeatedly


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
From herbaceous stem cuttings
From softwood cuttings

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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There are a total of 12 photos.
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1 positive
1 neutral
No negatives

Gardeners' Notes:

Neutral tumorgrrrrl On Jan 13, 2014, tumorgrrrrl from McKinney, TX wrote:

Those who are trying to trade seeds or cuttings of this plant should know that it is patented (PP 11854), which means that even trading of this plant for free is prohibited. I don't know the developers, I'm just a firm believer in copyright, whatever it's forms.

Positive tabasco On Apr 1, 2008, tabasco from Cincinnati (Anderson Twp), OH (Zone 6a) wrote:

'Plum Crazy' is an elegant plummy colored perennial hybrid hibiscus introduced by the Fleming Brothers of Lincoln, Nebraska. The Flemings are famous for having produced several 'rose mallow' hybrids that are are typically crosses of H. moscheutos and H. coccineus varieties, and which are hardy to as far north as Zones 4 and even 3 (with pine bark winter mulches recommended).

We have enjoyed two 'Plum Crazy' hibiscus in a sunny low spot in a front garden for two years and I couldn't do with out them. They are wonderful plants that emerge from dormancy in late spring and don't begin to bloom until July, so they make nice companion plants for spring blooming bulbs, campanulas, and siberian iris. Others recommend planting 'Plum Crazy' with a selection of tall grasses. While the Fleming hibiscus don't like 'wet feet' they do require regular watering, either natural or irrigation.

"Plum Crazy" is a heavy feeder and likes monthly feedings of garden fertilizer until June. From June on, a fertilizer light on the nitrogen is preferred. The Fleming hibiscus are bred to be shorter and more compact ('Plum Crazy' is 4' x 3' according to the Fleming site) than the old fashioned garden hibiscus and may not need pruning unless you choose to. Some gardeners like to pinch out the early tips of perennial hibiscus to promote a bushier plant and more blooms. I have not done this in previous summers, but I may try it this year to create a 'show case' plant.

This hibiscus will stop blooming and die back after the first frosts. I did not cut them back immediatedly in the fall but waited until early spring to cut back to promote plant health and re-emergence in the late spring.

Perennial hibiscus are often easily propagated by cuttings taken from plants in early summer, dosed with a bit of rooting hormone and situated in growing medium or water, however, 'Plum Crazy' is patent protected and propagation is restricted.

I love this particular hibiscus. It is elegantly shaped with beautiful plum tinted leaves and flowers that are proportional to the leaves and stems and other plants in the garden. It is readily available at better perennial nurseries and on the internet. I purchased large plants at an end of season sale for $10 each. Now that I know how lovely they are to have in the garden I would have paid much more!


This plant has been said to grow in the following regions:

San Jose, California
Aurora, Colorado
Orange Park, Florida
Farmersburg, Indiana
Greenville, Indiana
Florence, Mississippi
Forked River, New Jersey
Baldwinsville, New York
Cincinnati, Ohio
Haviland, Ohio
Bristol, Pennsylvania
Cookeville, Tennessee
Copperas Cove, Texas
Jacksonville, Texas
Oakhurst, Texas
Temple, Texas
Manassas, Virginia
, Washington
Eau Claire, Wisconsin
Sauk City, Wisconsin

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