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Geranium 'Rozanne' (Hardy geranium)

Photo/Illustration: Michelle Gervais

(Based on 32 user reviews)

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Hardiness Zones:

Botanical Name: Geranium 'Rozanne' jer-AY-nee-um

Common Name: Hardy geranium Genus: Geranium

The large blooms of this perennial are a spectacular violet-blue with a white throat and darker venation on plants 1 to 2 feet tall and wide. The attractive foliage weaves itself through neighboring plants. Grow in borders, containers, or rock or cottage gardens. 'Rozanne' is most effective en masse.
Noteworthy characteristics: A full season of blue-violet blossoms that seem to glow.
Care: Site in full sun or partial shade. Tolerant of most well-drained soils, but prefers moderate fertility and a moist soil.
Propagation: Divide in spring or fall.
Problems: Hardy geraniums are prone to mildews, bacterial blight, gray mold, and leaf spots. Also watch out for leaf miner and slugs.

Overview
User Reviews
Photos

Height	1 ft. to 3 ft.
Spread	1 ft. to 3 ft.
Growth Habit	Clumps;Spreads
Growth Pace	Moderate Grower
Light	Full Sun to Part Shade
Moisture	Medium Moisture
Maintenance	Low
Characteristics	Attracts Butterflies; Showy Flowers
Bloom Time	Early Summer; Late Spring; Spring; Summer
Flower Color	Purple/ Lavender Flower
Uses	Beds and Borders, Ground Covers
Style	Cottage Garden
Seasonal Interest	Summer Interest
Type	Perennials

Rate this plant

posted by char2755
5/11/2008
Region: Midwest
Zone: 4

This is a great plant is our area. It has wonderful color and nice purple flowers. It is a very nice ground cover and very easy to propagate.

posted by gracepete
4/29/2008
Region: Pacific Northwest
Zone: 8

No problems whatsoever. Planted in full sun, front of the border. Blooms until frost, pretty leaves.

posted by Maryland
4/11/2008
Region: Mid-Atlantic
Zone: 7

I have lots of hardy geraniums in my Baltimore gardens. I do not have a problem with mildew or slugs, even though we have very humid summers. My geraniums are a staple in my half acre yard.

posted by austinbailey
4/10/2008
Region: South
Zone: 8

posted by ilex46
4/9/2008
Region: Midwest
Zone: 5

posted by AnnieRose
4/9/2008
Region: Northeast
Zone: 5

Flowers all summer in full sun...beautiful! Makes a nice mound that increases neatly.

posted by TingTing
4/8/2008
Region: Pacific Northwest
Zone: 9

This hardy geranium is one of my favorites. The color is beautiful. The geranium grows in a half shady spot, because the summer afternoon sun can be very warm.

posted by Achinback
4/8/2008
Region: Pacific Northwest
Zone: 8

Tireless and cheerful

posted by sjbgarden
4/8/2008
Region: Upper Plains
Zone: 5

Geranium 'Rozanne' is one of the longest blooming geraniums I have planted here in zone 5. It bloomed all summer, even with the drought we had in southern MA. It does stretch out a bit, so a nice trim midseason will keep it in place a bit as well as promote blooming.

posted by Janorm
4/8/2008
Region: Gulf Coast
Zone: 9

The only problem with this species is constant need of moisture.

posted by rebkev
4/8/2008
Region: West
Zone: 10

easy plant with lots of flowers, but I'm not a geranium fan

posted by Denisey
4/8/2008
Region: Midwest
Zone: 6

I grow this geranium, and it's a nice addition to the border. Geraniums in general are good growers, with few pests. The flowers are long lasting, too.

posted by laurawege
4/6/2008
Region: Northeast
Zone: 5

great plant ! the first one I had just flowered it's little heart out all season until the frost knocked it down . I have since bought several more and they have all done equally well. A very nice plant that is so far problem free for me

posted by pondlady
4/4/2008
Region: Midwest
Zone: 7

I was looking for a long blooming perennial suitable for zone 5, sun, and low maintenance. I planted several of them around our pond and to my surprize they were still in bloom in mid november. We had a hard winter in Michigan this year with almost record snowfall and cold temperatures. On April 1st I was elated to see that there was already new growth on my hardy geraniums. At this rate they will be bloming with the daffodills that are only 2" tall today. They look wonderful in front of my pampas grasses and provide color and a nice full structure while the grasses come up in the spring and early summer.

posted by SylviaF
4/1/2008
Region: Northeast
Zone: 7

Most carefree of perennials in either sun or part sun with an abundance of blooms all season. We have sandy soil amended with composted cow manure and I give it a good trimming of all the blooming stems after the first bloom, which gives me a wonderful second bloom.

posted by lastmanager
3/30/2008
Region: Midwest
Zone: 6

This plant lives up to the great press about it, and continues to do so year after year. Very long bloom time, very hardy, no pests..just an easy care, great plant.

posted by McGigs
3/29/2008
Region: Midwest
Zone: 5

Rozanne provides a season of blooms if sheered a few times. It rambles unobtrusively along boarders and is a simple, hard-working, low-key addition to any garden. My favorite geranium.

posted by suzygirl
3/28/2008
Region: Midwest
Zone: 5

Bloomed beautifully in part shade for 2-3 years, then fewer and fewer blooms (foliage remained nice-looking)

posted by susiesunshine
3/28/2008
Region: Northeast
Zone: 6

I purchased this plant two years ago and have been extremely happy with it. It blooms from May straight through to the first killing frost. It requires no dead heading, and two plants filled a large area at the front of a bed. I did give it a "haircut" once on the backside so it would not sprawl over a newly planted, and therefore smaller, plant to the rear of it. It did spillover onto the pathway and looked lovely. It performed so well that I purchaed several more to place along my garden path. I did not experience any mildew.

posted by ethom
3/28/2008
Region: Midwest
Zone: 5

posted by anythinggrows
3/28/2008
Region: Midwest
Zone: 6

The initial bloom was prolific. Only had scattered blooms for the remainder of the season in morning and early afternoon sun exposure.

posted by arthritic1
3/27/2008
Region: West
Zone: 9

San Francisco Peninsula. Gets half-day sun, does great all summer despite hot and dry conditions. Problem only because Japanese Anemone is invading the area, and the foliage is somewhat similar--hard to eradicate the invader with confidence! The blue color is refreshing, and weaves around beneath lilies, dahlias, campanulas, iris, nothing can stop it, and it doesn't bother any other plants either.

posted by Catgirl
3/27/2008
Region: Lower Plains
Zone: 6

Very reliable and pretty color.

posted by artistica
3/27/2008
Region: Northeast
Zone: 5

Nice flower color but the plant is a little sprawly when grown in my part shady garden.

posted by MontanaRaven
3/27/2008
Region: Mountain West
Zone: 4

Excellent almost constant bloomer that brings bright splash of color to the semi-shade in our garden. I love it as a groundcover. Deer love this one!

posted by gardenlady100
3/27/2008
Region: Pacific Northwest
Zone: 8

posted by heuchera
3/27/2008
Region: Southeast
Zone: 8

posted by nmarotta
3/27/2008
Region: Northeast
Zone: 6

This is a fairly recent addition to my full sun garden. I just love it - it blooms all summer long. Haven't noticed any disease or insect problems yet. Grows fairly quickly.

posted by Liberty1889
3/27/2008
Region: Midwest
Zone: 5

I love this geranium, as it blooms all summer in great color for me in partial shade. My only little complaint is that it is a bit floppy in the partial shade, but I fear the midwest full sun may be too much for it. I just prop it up with twiggy branches.

posted by GARDENER
3/27/2008
Region: Pacific Northwest
Zone: 10

Reliable, colorful, no extra work. Great near the border to compliment other plants nearby. I have many hardy geraniums as a result.

posted by Pittsburgher
3/27/2008
Region: Midwest
Zone: 4

posted by tmeier
3/24/2008
Region: Northeast
Zone: 6

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