Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) 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)
On Mar 22, 2013, klgaffney from Bayville, NJ wrote:
Beautiful blooms, and the sprawling habit made it a charming companion to a patch of 'ragged jack' kale. The heat of late summer did beat it up some; it didn't occur to me to cut it back and see if it would recover in the fall. I'll try that this year.
On Feb 29, 2012, Wildernessgirl from Mountain Village, CO wrote:
I live in a ski town where quite often it doesn't stop snowing until May and starts again in October. I bought three of these that were already mature and planted in area that is part shade and very damp. I love these plants! They bloomed from May until October. They did die back in late August but a week or two later started a r growth and were even more beautiful. Require very little care other than watering. They came back even fuller and taller with more blooms the second year. They are growing in area where very few flowers would grow. The sweet woodruff growing next to it is a full shade plant.
On Aug 10, 2011, anelson from Birchwood, WI (Zone 3b) wrote:
This plant has beautiful blue blooms. It's true that it does have a bit of a trailing/flopping manner, but that only applies to the stems on which the flowers are borne - those stems do not have many leaves so they can just nestle into the plants around them and the little blue flowers can peek out from behind other foliage. Once they have finished blooming and are trimmed back, the foliage makes a tidy mound about 12-15" high.
On Jan 17, 2009, pgt from Chalfont, PA (Zone 6b) wrote:
Love, love, love this plant! I planted a few of these from bare-root 2 years ago. The plants blooms from May through the end of June, and are just gorgeous. They are so light and airy, and the flowers are a lovely blue-purple. When they are done blooming, I cut the plants down to the ground, and fresh dark green beautiful foliage emerges quickly for the rest of the summer, and then turns red for the fall. I think that this plant gives a garden a 'cottagy feel'. Highly recommend it.
On Mar 7, 2007, Bellisgirl from Spokane, WA wrote:
This will be my third year growing this plant. I adore it! Mine got about two feet high! I think that is because it is in almost full shade, in an area that stays perpetually moist. It is also has good drainage in sandy soil on a slight slope. I love its true-blue flowers!
On Sep 10, 2005, AuntieFran413 from Marysville, WA wrote:
We inherited this unknown entity when we bought this house in September 2004. What a joy it's been! It was just covered with beautiful blossoms for months! Yes, it tends to sprawl, but I much prefer a casual garden to a formal one so that may be why I love this plant so much!
On Mar 6, 2005, northgrass from West Chazy, NY (Zone 4b) wrote:
I am growing mine in a rather dry area where it is doing pretty well. The plant is leggy but planted among other plants, it can be an asset. The flowers are very pretty popping out unexpectely here and there.
On Dec 30, 2004, JefeQuicktech from Moorhead, MN (Zone 4a) wrote:
'Johnson's Blue' is a very mannerly, yet, rugged plant that does well in our zone without any special protection. It graces the middle of a paver stone deck nestled comfortably next to a Feather Reed Grass 'Karl Foerster' (Calamagrostis acutiflora). They seem to really like each other.
On Jun 1, 2004, Karenn from Mount Prospect, IL (Zone 5a) wrote:
Johnson's Blue is probably one of the easiest cranesbills to grow. I have found when I place a grow ring above it, it is much better behaved in spring. You can delay flowering in spring by pinching back, but I love the "blowsey" look with the grow ring. When the flowers start to fade, I shear it back, almost to the ground. It regrows much better behaved foliage, and sometimes will rebloom, but not as abundantly as the first bloom. I live in 5a/4b and have this plant on the east side of my home with fairly moist soil (courtesy of a close downspout). It has made babies a few times; since it's alongside a flagstone/pea gravel path, I have kept some, and dug & passed on the others.
On May 31, 2004, Magazinewriter from Bloomfield Hills, MI wrote:
It has been extremely rainy here in Michigan. The Johnson's Blue Geraniums I planted earlier this spring just started to bloom when they got flattened by a torrential rainstorm. They look as if they will continue to bloom a lot -- but it is an awfully messy looking plant.
On May 18, 2004, henryr10 from Cincinnati, OH (Zone 6b) wrote:
I bought this plant unmarked in an end of season sale last Fall here in Cincinnati (Zone6).
Half dried out, root-bound and ragged I think it went for a dollar.
I planted it in a ten inch pot and promptly forgot about it.
It was left in the open unprotected, by me, all winter.
It had a minimal leaf cover and whatever snowfall we had.
Temps dipped to 0 several times.
Come early Spring I got a flush of growth from a, I thought, bare dead pot.
Now it 15" tall and wide, in full bloom, and gorgeous.
On Mar 21, 2004, vidamc from Fenton, MO (Zone 6a) wrote:
This plant actually grows about 30" tall with a spread of approx 36" in my garden. It gets sheared (way too many blooms to deadhead) in the hottest part of summer then reblooms. I would actually prefer it to grow more compact, does anyone know if this can be cut back in the spring (like I do with garden mums) to create a tighter growing plant?
They like moist, well- drained soil; organic soils promote spread. Give plenty of water during hot spells to keep the blooms coming. Shear after blooming to rejuvenate and they will rebloom. One neat feature of 'Rozanne' is that the foliage turns reddish-brown in Fall. Divide in Spring when clumps show signs of crowding (approximately every 4 years).
On Oct 21, 2002, jkom51 from Oakland, CA (Zone 9b) wrote:
Vigorous grower, but in our Nor. Ca. dry summers, it dies back. Revives when watered again, however. To keep it evergreen, needs a weekly watering, so not suitable in xeriscaping except in moister, clay-based beds.
On Mar 9, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:
Vigorous, clump forming perennial flowers starting in spring to early summer; may go dorman in hottest weather. Cup-shaped flowers are a vivid blue and tinged pink at the center. Plant in well-drained soil. Provide afternoon shade, especially in the south.
This plant has been said to grow in the following regions:
Bear Creek, Alaska Little Rock, Arkansas Clovis, California Mission Viejo, California Highlands Ranch, Colorado Mountain Village, Colorado Lake Alfred, Florida Boise, Idaho Chicago, Illinois Des Plaines, Illinois Mount Prospect, Illinois Brownsburg, Indiana Oak Park, Indiana Inwood, Iowa Nichols, Iowa Cochituate, Massachusetts Dracut, Massachusetts Jamaica Plain, Massachusetts Norton, Massachusetts Uxbridge, Massachusetts Redford, Michigan Andover, Minnesota Blaine, Minnesota Fridley, Minnesota Murphy, Missouri Bellevue, Nebraska Bayville, New Jersey Clearbrook Park, New Jersey Albuquerque, New Mexico Buffalo, New York Deposit, New York Jefferson, New York Pennellville, New York Wallkill, New York Belfield, North Dakota Medora, North Dakota Bucyrus, Ohio Columbus, Ohio Coshocton, Ohio Fruit Hill, Ohio Enid, Oklahoma Dallas, Oregon Deschutes River Woods, Oregon Lake Oswego, Oregon Albion, Pennsylvania Brittany Farms-highlands, Pennsylvania Coopersburg, Pennsylvania Aberdeen, South Dakota Christiana, Tennessee Crossville, Tennessee Knoxville, Tennessee Mansfield, Texas West Valley City, Utah Essex Junction, Vermont Newport, Vermont Fairlawn, Virginia Lexington, Virginia Lincoln, Virginia Ames Lake, Washington Cascade-fairwood, Washington Seattle, Washington Vancouver, Washington Birchwood, Wisconsin Milwaukee, Wisconsin Shorewood Hills, Wisconsin Bessemer Bend, Wyoming Cody, Wyoming Johnstown, Wyoming Riverton, Wyoming