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Canterbury Bells

Campanula medium
Also known as: Canterbury Bells, Bell Flower

Canterbury Bells is a flower in the Campanulaceae family. It grows best in full sun to part shade with medium moisture, and is listed for USDA zones 4-10. Plants reach maturity about 150–210 days after planting and sit about 12 inches apart.

Varieties

1 from True Leaf Market · sorted by days to maturity
  • ▸Cup & Saucer Mixture150–210 days

    Non-GMO; Container

    2nd Year Maturity. Cup and Saucer Mix seeds grow one of the most unique and internationally classic blooms available to the home gardener. Boasting famous "cup-shaped" blooms, campanula is a floral shop favorite for its dense and elegant spikes in a seasonal pastel mix of pinks, violets, white, and indigo. Campanula is native to cooler, high altitude climates and promises to thrive in many temperate and shaded gardens. Cup and Saucer Mix campanula matures into robust 24-30" tall bushy uprights ideal for indoor pots, rock gardens, or left to naturalize in rustic and woodland clearings. ~56,000 Seeds/Ounce.

    View on True Leaf Market ↗
Family
Campanulaceae
Category
Flower
Form
Bush
Lifecycle
biennial
Zone
4-10
Height
2–2.5 ft
Spread
1–1.5 ft
Sun
Full sun to part shade

Plant spacing

1 plant per square footSquare-foot planting diagram: one canterbury bells fills a 1-foot square, spaced 12 inches from its neighbors.
1 plant per square foot

In a square-foot bed, space canterbury bells about 12 in apart — that fits 1 plant in each 1-foot square (1×1). Wider rows or containers space the same.

Water
Medium

Plan your canterbury bells planting

Add canterbury bells to a free GardenDraft plan and get sow, transplant, and harvest dates computed for your ZIP code — with a drag-and-drop bed layout and reminders when it’s time to plant.

Start your free plan →

At a glance

Days to harvest
150–210 days
From transplant or sow to first harvest
Harvest style
Harvest once
One main harvest
After harvest
Use within days
Quality eases off after peak
Frost tolerance
Hardy · to ~20°F
Lowest temperature the foliage usually survives
Germination
~60%
Typical minimum germination rate

Growing timeline

When to plant and harvest canterbury bellsPlanting timeline for canterbury bells, relative to last frost: start indoors from 12 weeks before last frost to 2 weeks before last frost; grow from 2 weeks before last frost to 19 weeks after last frost; harvest from 19 weeks after last frost to 28 weeks after last frost.Start indoorsGrowHarvestLast frostTransplant
Start canterbury bells indoors ~10 weeks before transplanting 2 weeks before last frost; first harvest 19 weeks after last frost.
Seed to transplant
56-70 days
Outdoor planting
-14 to 0 days vs frost
Propagation
Seed
Schedule anchor
Last Frost

Care & troubleshooting

No curated care & troubleshooting advice for canterbury bells yet. Our extension-sourced library currently focuses on common edible crops; we're expanding it over time.