Canterbury Bells Seeds – Campanula medium Bellflower

Bring classic bell-shaped flowers to garden borders and containers with Canterbury Bells (Campanula medium), a distinctive biennial bellflower valued for its upright growth and attractive summer flowers. This species belongs to the Campanulaceae family and is known for its large, broadly bell-shaped blooms in shades including blue, pink, and white.

Campanula medium develops a basal rosette of lance-shaped green leaves followed by an upright, leafy flowering stem. Mature plants typically reach approximately 0.5–1 metre in height, with a relatively narrow spread. The flowers have the characteristic bell-like form associated with Canterbury Bells and appear during the summer flowering period.

As a biennial, Canterbury Bells generally grow foliage during the first stage of their growth cycle before producing their prominent flowering stems. They are well suited to traditional flower borders, cottage-style gardens, informal plantings, wildlife-friendly spaces, and containers.

Light: Grow in full sun or partial shade. A position receiving good light supports healthy growth and flowering.

Soil: Campanula medium adapts to a range of soil types, including chalk, clay, loam, and sand, provided the soil is moist but well-drained. Avoid areas where water remains around the roots for extended periods.

Watering: Keep the soil reasonably moist during active growth while avoiding waterlogged conditions. Consistent moisture is particularly useful while plants are establishing.

Container Growing: Canterbury Bells can be grown successfully in containers. Use a free-draining growing medium and select a container with adequate drainage holes.

Campanula medium is propagated from seed. The RHS recommends surface sowing from late spring to early summer, while in milder areas seeds may also be sown directly outdoors in autumn. For best results, provide a suitable seed-starting medium and maintain appropriate moisture without making the growing medium soggy.

Canterbury Bells are suitable for a variety of ornamental planting situations, including:

• Flower borders and beds
• Cottage and informal gardens
• Patio and container displays
• Wildlife gardens
• Underplanting around roses and shrubs
• Cut-flower gardens

Their upright flowering stems and bell-shaped blooms make them particularly useful where vertical interest and seasonal colour are desired.

Provide good drainage and avoid excessively wet conditions. Spent flower spikes can be removed to encourage additional flowering, while leaving some flowers to develop seeds can allow the plant to self-seed naturally. Canterbury Bells may be susceptible to common garden pests such as slugs and snails, as well as fungal problems including powdery mildew and rust.

Botanical Name: Campanula medium
Common Name: Canterbury Bells, Canterbury Bell
Plant Family: Campanulaceae
Growth Type: Biennial
Flower Form: Broadly bell-shaped
Flower Colours: Blue, pink, or white
Height: Approximately 0.5–1 metre
Light: Full sun to partial shade
Soil: Moist but well-drained
Growing Method: Seed propagation
Container Suitable: Yes