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Campanula medium
Canterbury-bells
Campanula medium
Campanula medium, commonly known as Canterbury Bells, is a biennial flowering plant native to southern Europe. It is prized for its showy, bell-shaped flowers that come in a variety of colors, including purple, pink, white, and blue. These flowers bloom in early summer and are excellent for cut flower arrangements. The plant typically forms a rosette of leaves in its first year and then produces a tall flower stalk in its second year before dying after seed production.
CategoryDetails
Duration to maturity12 months to harvest
Estimated Plant Lifespanunknown lifespan
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: Animal

Notes: Bees and other insects are attracted to the flowers and facilitate pollination.

Watering Requirements

Method: Water at the base of the plant

Frequency: Regularly, especially during dry periods.

Notes: Avoid overhead watering to prevent fungal diseases.

Humidity Requirements

Level: Moderate

Maintenance: Provide good air circulation around the plants to prevent fungal diseases, especially in humid environments.

Care InstructionsDeadhead spent flowers to encourage further blooming. Provide support for tall varieties to prevent them from flopping over.
Temperature Range

Min: -1°C

Max: 30°C

Alternative NamesMarianthemum grandiflorum, Campanula bourdiniana, Campanula florida, Campanula grandiflora, Marianthemum medium, Medium grandiflorum, Rapuntia media, Sykoraea hortensis, Talanelis medium

Cultivars

Cup and Saucer Mix

Price: $10.95
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Digitalis purpurea
purple foxglove
Digitalis purpurea
Foxgloves have similar growing conditions and provide a complementary vertical element in the garden, enhancing the visual appeal.
Lavandula angustifolia
Common Lavender
Lavandula angustifolia
Lavender's silvery foliage and purple flowers provide a beautiful contrast to the Canterbury Bells, and it thrives in similar sunny conditions.
Campanula glomerata
clustered bellflower
Campanula glomerata

Both require similar nutrients and space; planting them together can lead to overcrowding and reduced vigor in either plant, especially as they compete for root space.

Slugs and Snails

These pests can feed on the leaves and stems, causing holes and damage. Look for silvery trails on the leaves. Control them with slug and snail bait or traps.

Aphids

Small, sap-sucking insects that cluster on stems and leaves. They can cause stunted growth and discolored foliage. Inspect plants regularly and treat with insecticidal soap or neem oil if infestation occurs.

Steps:

    • Sow seeds indoors 6-8 weeks before the last expected frost, or directly outdoors after the danger of frost has passed.
    • Use a well-draining seed-starting mix.
    • Surface sow the seeds and press gently into the soil; they need light to germinate.
    • Keep the soil consistently moist but not waterlogged.
    • Germination typically takes 14-21 days at 65-70°F (18-21°C).

Neem Oil

Effective for controlling aphids and other pests.

Slug and Snail Bait

Protects against slug and snail damage.

Compost

Enriches the soil and provides nutrients for healthy growth.