Cariboo™ Big Blue Star Campanula

Cariboo™ Big Blue Star is an interspecific bellflower developed as a more vigorous Cariboo selection for filling larger containers. It bears blue flowers on upright, mounding plants and is listed for full sun, with spring-to-summer bloom and a compact garden footprint. ## Flowers and form The [Syngenta Flowers profile](https://www.syngentaflowers.com/ams/product/flower/70106977) identifies Cariboo™ Big Blue Star as product 70106977 and describes it as an upgrade to Cariboo Forte Blue with increased vigor for larger containers. The breeder lists blue flowers, an upright-mounding habit, mid-spring through summer flowering, and typical Cariboo dimensions of 14–18 inches high by 8–12 inches wide. Its series hardiness range is 5a–9a. These traits make it useful as a container specimen or compact accent among lower perennials. ## Siting Syngenta lists this selection for full sun. For general Campanula care, the [RHS growing guide](https://www.rhs.org.uk/plants/campanula/specialist/growing-guide) recommends moist but not soggy soil through the growing season, with extra attention during dry spring and summer weather. The Cariboo series is selected for early, strong flowering and color that continues through summer. Place pots where the blue flowers can be seen close up, or repeat the plants along a sunny border. ## Maintenance Keep newly planted specimens evenly moist while they establish. During warm weather, monitor container moisture and water before the root ball dries completely. Remove spent flower stems for tidiness and continued display, and avoid standing water around the crown.