Spacing: 36-48 in. (90-120 cm) 4-6 ft. (1.2-1.8 m)
Hardiness: 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)
On Oct 30, 2011, pneumaticat from House Springs, MO (Zone 6a) wrote:
I inherited this plant (Spiraea thunbergii, but most likely not the cultivar 'Ogon') with my house. It's growing out of the side of a rock retaining wall next to (and underneath) a red oak, and mixed up with a gallica rose that's also growing out of the wall. This past summer it did not rain for months and this plant gets no extra water. It wilted some, but did not die and is now perfectly healthy. Never fails to bloom each spring, despite the shade. I'm only wondering how to move it as I need to repair the wall.
On Mar 10, 2008, konijntje from Seattle, WA (Zone 8a) wrote:
I can't say enough about this lovely shrub. I planted it last summer at the peak of the severe drought here in northwest Georgia and put it in an area of the yard where it gets full afternoon sun. It took off immediately and never looked back. Summer and early fall found its leaves bright lime green. Late fall/early winter found its leaves a deep cranberry/orange/plum. It shed all leaves at the peak of winter and then early in February, flower buds appeared. Now, in only the second week in March, it is in full glorious bloom, each branch covered with brilliant white flowers, so welcome in a winter yard. It is a fantastic shrub, adding both vibrant, season-dependent color and a lot of movement, as the branches dance graefully in the breeze. The plant is hardy, too, given that it went from 100-degree, drought-stricken summer days through this winter and its extreme ups and downs (teens one week, 70s the next). I wish I had bought several more and am sure going to this year!
On Feb 22, 2008, janecarol2 from Fort Jennings, OH wrote:
In the 3 years I've had this plant, every summer the leaves on the outer branches have turned brown and die. In the spring I've had to cut out dead branches. I have this plant in full sun, perhaps that's part of the problem. Last year I watered it during drought and that did not seem to help. I'm going to move it to part shade in a sheltered area & see if it does any better. I live in zone 5
This plant has been said to grow in the following regions:
Smiths, Alabama Hesperia, California Sebastopol, California Edgewater, Colorado Atlanta, Georgia Douglasville, Georgia Mount Prospect, Illinois Northfield, Illinois Ewing, Kentucky Gardere, Louisiana Byrnes Mill, Missouri Fort Jennings, Ohio Enid, Oklahoma East Norriton, Pennsylvania Northlake, South Carolina Arlington, Virginia Lexington, Virginia Linden, Virginia Onancock, Virginia