Spacing: 15-18 in. (38-45 cm) 18-24 in. (45-60 cm)
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 Jul 31, 2012, chrystypas from Bessemer Bend, WY wrote:
Birds must have dropped seed-did not plant this. High plains area of central Wyoming. Does beautifully in full sun, another seed must have been dropped in an area that gets afternoon shade-does bloom, but not quite as prolific as full sun.
On Aug 10, 2011, anelson from Birchwood, WI (Zone 3b) wrote:
The cobalt blue of this plant is breathtaking when in bloom. I have an easier time growing this in Wisconsin where the nights are cool and the soil is more acidic than I do in Nebraska. It is not particularly attractive when not in bloom so it is a good idea to plant it somewhere where the low leaves will be hidden when the bloom stalks have been removed.
On Jun 30, 2010, Lindablu99 from Woodstock, NY wrote:
I put in a single campanula golmerata superba last year. I was not familiar with this plant but wanted something purple. It didn't bloom the first year but produced beautiful flower clusters this year! My only surprise was that the flowers were a very light blue, almost white. Then, a second group of taller stems bearing dark purple flowers starting appearing as the white clusters started dying off.
Is this normal? What would cause the plant to produce two different colors? Gorgeous but a curiosity!
On Jun 11, 2003, RubyStar from Madison, WI (Zone 5a) wrote:
Definitely one of my faves in the garden. Takes awhile to establish, but very much worth the wait. Once it is established it does not require staking, if grown in proper conditions. In my experience it does better in part sun than in full sun; definitely needs a little protection during the blazing afternoons. Tolerates average water (min 1"/wk) but is happier when you're a little more generous with the water. Likes fertile soil w/organic matter.
This cultivar is distinct from the species for its taller flower stalks (30" avg in my garden) with very prominent round clusters of dark purple flower heads. Blooms over a long period of time -- as upper clusters finish, the lower ones take over the show.
A very nice plant that is easy to grow and very pleasurable to see in bloom once established.
This plant has been said to grow in the following regions:
Anchorage, Alaska Flagstaff, Arizona South Lake Tahoe, California Martinez, Georgia Franklin Grove, Illinois Mount Prospect, Illinois Wilmette, Illinois Bloomfield, Iowa Davenport, Iowa Smiths Grove, Kentucky Norton, Massachusetts Winchester, Massachusetts Caro, Michigan Midland, Michigan Owosso, Michigan Golden Valley, Minnesota Crestwood, Missouri Lincoln, Nebraska Annandale, New Jersey Elba, New York Greene, New York Southold, New York Zena, New York Stallings, North Carolina Bexley, Ohio Bucyrus, Ohio Corning, Ohio Monmouth, Oregon Freedom, Pennsylvania Leesburg, Virginia Kalama, Washington Port Townsend, Washington Walnut Grove, Washington Birchwood, Wisconsin Bessemer Bend, Wyoming