Cranesbill (Geranium Rozanne®) in the Geraniums Database

Trade name information:
Trade Name: Rozanne®
Cultivar name: 'Gerwat'
Common names:
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General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 8b
Plant Height: 18 - 20 inches
Plant Spread: 24 - 36 inches
Leaves: Good fall color
Other: Green foilage becomes reddish-brown in fall.
Flowers: Showy
Other: flowers have five petals; cut plants back almost all the way to the ground after flowering
Flower Color: Blue
Other: Violet-blue
Bloom Size: 2"-3"
Flower Time: Late spring or early summer
Late summer or early fall
Late fall or early winter
Other: May to frost.
Uses: Groundcover
Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Propagation: Seeds: Other info: Sterile
Propagation: Other methods: Cuttings: Stem
Other: Take semi-ripe cuttings during the late summer when growth has slowed and plant stems have become firmer.
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Patent/Plant Breeders' Rights: PP12175
Awards and Recognitions: RHS AGM
Other: 2008 PPA Perennial Plant of the Year; 2007 Great Plant Picks Award Winner; 2006 RHS Award of Garden Merit Winner
Child plants: one child plant


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Posted by Ispahan (Chicago - Zone 6a) on Jul 5, 2012 7:39 PM

A sweet and charming cottage garden flower that gracefully weaves its way through whatever is growing nearby. It blooms nonstop with an abundance of simple, wildflowery blooms that are very attractive to pollinators. Color ranges from vivid electric cobalt to hyacinth blue to a more pale lavender-blue depending on temperature and lighting conditions. The flowers can take on temporary pinkish tones when newly planted but the coloring will correct itself as the season progresses. One of my favorites; I will always have space in my garden for 'Rozanne'!

UPDATE 28 June 2013:
What a wonderful plant! I have this plant in full blazing sun, partial shade and almost full shade, and it does surprisingly well in all areas. In full shade, plants are a bit sparser and lankier but still manage to bloom well.

This plant is not a tidy, compact specimen. It is a sprawling weaver that can and should be placed closely among other plants so it can scramble up into them. I happen to love this informal, cottage look.

I lost two of my less established plants over the winter due to severe frost heave. They were unmulched and we had a long and difficult winter with no snow cover and countless freeze-thaw cycles. My other 15 plants returned beautifully and are now larger and more amazingly floriferous than ever.

I have been taking advantage of sales and buying up as many 'Rozanne' as I can find to tuck in throughout my garden. It is non-invasive and non-smothering, and to me it is the perfect garden unifier! It is probably my overall favorite cranesbill.

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Posted by kniphofia (Northumberland, UK) on Sep 20, 2020 6:32 AM

One of my very favourite perennials, Geranium Rozanne thrived in a pot for me until I had to give it away when I moved house. Named after Rozanne Waterer who found it in her garden, it is a hybrid of G himalayense and Geranium wallichianum 'Buxton's Variety'. It has everything you could want from a herbaceous perennial, lovely leaves, bee friendly blooms and good autumn colour.

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Posted by kqcrna (Cincinnati, Oh - Zone 6a) on Sep 17, 2011 6:06 AM

Purchased and planted as a small plant one year ago, Rozanne has been blooming non-stop since late May. Now, in September, it continues to bloom and look pretty. The best addition to my garden in a long time. I was so impressed that I just bought another one.

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Posted by Skiekitty (Denver Metro - Zone 5a) on Oct 16, 2015 11:11 AM

Surprisingly hardy. Withstands cold, extreme heat, drought, and neglect. Bloomed nicely in the late spring, then a second flush in early autumn. Does look a bit scraggly in mid-summer, though. 2nd year in ground - 2015.

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Posted by jmorth (central Illinois) on Feb 6, 2012 1:46 PM

PPA Plant of the Year 2008.

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Plant Events from our members
aspenhill On May 22, 2012 Obtained plant
DG Jill (critterologist) - qty 1
christine2 On May 5, 2017 Transplanted
2 from SPath
christine2 On May 1, 2008 Obtained plant
beenthere On September 13, 2019 Obtained plant
Received 50 plug tray from Santa Rosa Gardens. They look good and I'm starting to plant.
beenthere On May 19, 2019 Transplanted
Last week transplanted 4 of the original 7 plants and divided 1. All are doing well, a couple have started blooming. Each is getting watered daily. Now that I know they can survive division, I want them everywhere!
beenthere On April 26, 2019 Obtained plant
Actually planted here last fall.
beenthere On April 26, 2019 Obtained plant
Last 7 plants in flat from Santa Rosa Gardens. The rest were a gift for my Mom. Put my 7 on the Hill. They all thrived in the dry, rocky soil and bloomed their little heads off! Have 6 more on the way.
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