Do you have Campanula persicifolia var. planiflora ‘Coerulea’ currently in stock at the nursery?
They will prefer to be grown with cool nights and light shade in hot areas. The soil should be neutral to alkaline, moist yet well drained. Deadhead to maintain shape.
The seeds should be sown in the spring and will bloom the following spring and summer.
Pests, diseases or disorders
Heavy rain can damage plants. Slugs.