Illustration
Angel Bells Clustered Bellflowers
Campanula glomerata 'Angel Bells'
Also called angel bells bellflower
Angel Bells Clustered Bellflowers blooms from June through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Angel Bells Clustered Bellflowers
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 16 in tall and 20 in wide at maturity, in roughly 2 years (a house reading).
No toxicity note is on file for Angel Bells Clustered Bellflowers. That is not a clearance: check its safety for people and pets before planting.
What was checked
Mature height and spread, hardiness zones, sun, water, bloom months and color and the trait tags were checked against named botanical sources for this plant, with what the sources could not settle written down; years to mature size rests on a recorded house rule where no publisher states one, and is marked so; its common name and alternate names have not been checked yet. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Angel Bells Clustered Bellflowers
Plant Angel Bells Clustered Bellflowers in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 5, the middle of its hardy zones 3 to 8, spring means April to June and fall means August or September. Once settled, it blooms from June to August.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 5, the middle of this plant's hardy range, start with zone 5 in April. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Angel Bells Clustered Bellflowers get?
16 intall5 ft 7 inan adult20 inwideSee Angel Bells Clustered Bellflowers in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Angel Bells Clustered Bellflowers
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Angel Bells Clustered Bellflowers about 20 in apart, center to center, so each plant has room to reach its full width.
Add Angel Bells Clustered Bellflowers to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Angel Bells Clustered Bellflowers' height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 9 published sources on September 26, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- NC State Extensionspecies pageheight, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity
- Plant Addictsthe queue's store; Proven Winners brandheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- Walters Gardensthe introducerheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- Missouri Botanical GardenSPECIES levelheight, spread, hardiness zones, sun, water, bloom months and color, soil, diseases and pests
- plants.thegrowingplace.comThe Growing Place, Naperville and Aurora, Illinois (NetPS Plant Finder...height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and pests
- US plant patent (Google Patents)Google Patents USPP31465P2; assignee Walters Gardens Inc.height, spread, hardiness zones, sun, water, bloom months and color and diseases
- Proven Winnersthe brand; the breeder's dataheight, spread, hardiness zones, sun, bloom months and color and soil
- gardencrossings.comGarden Crossings, Zeeland, Michigan (nursery)height, spread, hardiness zones and bloom months and color
- Plants For A FutureSPECIES levelbloom months and color, soil and toxicity
How the checking works, and what each standard covers, is on the verified plants page.
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.