Flowers of some campanula such as Campanula medium have a saucer-like base ... Though it’s usual to sow biennials in summer to produce plants for flowering next year, they can also be sown under cover ...

Multiple flower stems, curving outward and upward to 30cm tall, above a basal rosette of stalked, pale green, usually heart-shaped leaves. Large pale bluish-lilac flowers, 4-5cm long, a curvaceous ...