Blue campanula flowers are the most popular of all bellflowers, which is the common name for campanula plants, known for their bellshaped blue flowers, although they are available in white blooms also.
Most campanulas fall into two groups, the upright varieties, and the trailing, ground-hugging types.
Here is a list of the campanula varieties per group.
Upright Types: C.glomerata, C.persicifolia, C.lactiflora, C.latifolia, C.punctata, C.takesimana.
Trailing Types: C.carpatica, C.poertenschlagiana, C.poscharskyana, C.garganica, C.cochlearifolia, C.rotundifloria.
Campanula plants generally bloom at some time from spring to fall depending on the species.
These perennial campanula flowering plants tend to spread from the roots.
Garden Uses For Campanula Bellflowers
Plant the low-growing varieties as an edging, in the front of beds and borders.
Use taller species in the middle of beds and borders, and even in containers.
The trailing bellflowers are also great for hanging containers, or as ground covers.
Growing Campanula Flowers
They can grow in full sun to partial shade in average to fertile, well-drained, humusy, and average to moist soil.
Plants should be set out in fall for flowering the following year.
Use about 1 foot (30 cm) spacing for most bellflowers.
You should water new plantings regularly if rainfall is lacking.
Applying an organic mulch after planting will help keep the plants from heaving out of the ground during winter.
Most campanula bellflowers hold their base leaves well inot winter, and some are evergreen.
Remove any winter-damaged leaves in early spring, and apply another layer of organic mulch to help the soil most and cool during summer.