| Description | The unique blue flower adds to the charm of this plant. In favorable sites the plant can be invasive spreading by seeds. |
|---|---|
| Pronunciation | (sen-tah-REE-ah)(mon-TA-na) |
| Plant Type | All Plants, Perennials Hardy |
| Hardiness Zone | 3-8 |
| Sunlight | full, mostly sunny, partial sun |
| Moisture | average |
| Soil & Site | tolerates most soils but prefers one with a higher ph |
| Temperature | grows best in cooler regions. |
| Flowers | main color is blue but there are white, pink and amethyst cultivars available, flower is botanically a ray flower, outside long ray petal, florets are tubular and the ends are divided into segments, at the base of the flower each over lapping bract is tinged black |
| Roots | tap root |
| Maintenance | Dead heading to lateral buds can prolong bloom. Cut back to basal foliage after blooming. |
| Propagation | seeds, division |
| Native Site | Species plant native to Europe |
| Misc Facts | Reported to be an invasive plant spreading by seeds. I have never come across this plant in area where it was considered invasive. |
| Notes & Reference | #04-Herbaceous Perennial Plants (Allan Armitage), #54-The Well Tended Garden (DiSabato-Aust) |
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