Giant Bellflower Plant Care
Campanula thyrsoides L.
Updated · Sources · How we source care data
Campanula thyrsoides is a flowering plant belonging to the family Campanulaceae.
Every 7–10 days
Full sun to partial shade
50–75°F
40–60%
At a glance
How do you care for Giant Bellflower?
Water Giant Bellflower every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–75°F (10–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
What Is the Giant Bellflower?
Giant Bellflower (Campanula thyrsoides) belongs to the Campanulaceae family within the Campanula genus. Giant Bellflower is also known as Thyrsoid Bellflower.
Giant Bellflower displays an upright, spreading perennial growth habit, reaching up to 1 ft tall with a spread of approximately 1 ft. Giant Bellflower produces bell-shaped flowers in various colors like blue, purple, pink, or white.
Leaf size: approximately 3 inches.
How Often Should You Water a Giant Bellflower?
Campanula thyrsoides requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Giant Bellflower Need?
Giant Bellflower thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Giant Bellflower Prefer?
Campanula thyrsoides grows best at temperatures of 50–75°F. Giant Bellflower prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a Giant Bellflower?
Well-draining, fertile soil with added compost for nutrients. Good drainage is essential for Giant Bellflower to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Giant Bellflower?
Feed Giant Bellflower every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Giant Bellflower?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Giant Bellflower?
Giant Bellflower can be propagated through seeds, division of clumps, stem cuttings. Similar propagation techniques also apply to fairy's thimble plant care, which shares the same genus.
Is the Giant Bellflower Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Giant Bellflower, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Giant Bellflower?
Giant Bellflower is susceptible to aphids, slugs, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Giant Bellflower Need?
Giant Bellflower grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Giant Bellflower as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Giant Bellflower is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Campanula genus — compare its care with other Campanula species on PlantoScan.
Campanula is part of the Campanulaceae plant family — browse all Campanulaceae genera and species.
Giant Bellflower thrives in bright light and direct sun — see other bright-light plants.
More Campanula Species
Other Campanula species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Campanula thyrsoides L., family Campanulaceae (first published in Sp. Pl. : 167 (1753)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Giant Bellflower, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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