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Bats in the Belfry

Campanula trachelium (kam-pan-YOO-luh trak-EEL-ee-um)

Family: Campanulaceae Non-native Herbaceous (3-15 ft)

Nettle-leaved bellflower is an upright, showy, herbaceous perennial, native to Europe and Central Asia, and to the Mediterranean to Iran. Its native habitat is alkaline soils in woodland, scrubby grassland, and hedge banks of Europe. It has been naturalized in parts of Canada and the United States, and has been found along the roadsides in the States of Ohio, Pennsylvania, and Wisconsin. It grows up to 3 feet tall and has coarse, nettle-like leaves and nodding, open bell-shaped, lilac flowers. It is a member of the bellflower family (Campanulaceae). The genus name Campanula originates from the Latin word campana , meaning bell, and refers to its bell-shaped flowers. The specific epithet, t rachelium, is derived from the Greek word trachelos , meaning neck. It was once thought that this plant could be used to treat a sore throat. It was also given the common name, throatwort, for the same reason. The common name, bats-in-the-belfry, originated from the flower stamens' likeness to bats in a bell tower. This plant prefers to be grown in fertile, moist, well-drained soils in full sun to part shade; however, part shade will result in the best flower color. The plants thrive best in cool summer climates; therefore, in hot summer conditions, partial shade, especially in the afternoon, is necessary. Deadheading spent flowers encourages reblooming. The plants spread by self-seeding. Propagation can be done by seeds using a cold frame in the spring. They may also be divided in the spring or fall. The nettled-leave bellflower has rich green, basal leaves that are cordate to ovate, and the stem leaves are ovate to lanceolate. Each leaf is deeply toothed and has bristly hairs. The flowers appear in racemes at the top of the stems and are somewhat tubular and bell-shaped, nodding, in shades of lilac to bluish-purple. Use this plant in mass in a naturalized area, or at the edge of the woods. It adds height and interest to borders, cottage gardens, or wildflower gardens.. Insects, Diseases, and Other Plant Problems: Monitor for snails, slugs, and aphids. May be susceptible to powdery mildew and rust

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 62 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (3-15 ft) Optimal soil pH Alkaline (>8.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Native alternatives Campanula divaricata

Full plant profile

Growing Conditions
Plant type
Herbaceous Perennial; Wildflower
Life cycle
Perennial
USDA zones
5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
Light
Dappled Sunlight (Shade through upper canopy all day) | Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; High Organic Matter; Loam (Silt); Sand
Soil pH
Alkaline (>8.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist
Available space
12 inches-3 feet
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 2 ft. 0 in. - 3 ft. 0 in. | Width: 1 ft. 0 in. - 1 ft. 6 in.
Growth rate
Medium
Maintenance
Low
Canopy layer
4 - Herbaceous (3-15 ft)
Form & Appearance
Habit / form
Clumping; Erect
Texture
Coarse
Foliage
Deciduous
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Alternate
Leaf shape
Cordate; Lanceolate; Ovate; Reniform
Leaf margin
Doubly Dentate; Doubly Serrate
Leaf feel
Prickly; Rough
Leaf size
3-6 inches long
Hairs present
Yes
Leaf detail
Leaves are a rich green with a rough texture, bristly hairs, and the margins are deeply toothed. Basal leaves are cordate to ovate to reniform, up to 6 inches long, and have long stalks. The stem leaves are ovate to ovate-lanceolate and are stalkless. The undersides of the leaves are a paler shade of green.
Flower color
Blue; Purple/Lavender
Flower value
Showy
Flower form
Raceme
Flower shape
Bell; Tubular
Flower size
1-3 inches
Flower detail
The flowers appear in loose racemes at the top of the stem. Each bloom is 1.5 inches long and is an open bell shape. There are 5 fused petals in purple, blue, or lilac. The lobes of the petals are pointed, and the calyx has 5 erect, narrow, pointed teeth. Fine hairs are in the interior of the petal lobes. Blooming occurs from June through September.
Bloom time
Fall; Summer
Fruit type
Capsule
Fruit size
< 1 inch long, < 1 inch wide
Fruit detail
The fruit is a round, finely hairy, nodding capsule that dehisces from the base, and the seeds are dispersed.
Stem color
Green; Red/Burgundy
Stem detail
The green stems that are often reddish, reach up to 3 feet tall, and are 4-angled, roughly hairy, stiff, sharp-edged, and unbranching.
Wildlife & Ecology
Native status
Non-native
Origin
Europe to Central Asia, and the Mediterranean to Iran
Distribution
Native: Albania, Algeria, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Russia, Czechoslovakia, Denmark, East European Russia, Finland, France, Germany, Great Britain, Greece, Hungary, Iran, Ireland, Italy, Kazakhstan, Lebanon-Syria, Morocco, Netherlands, North European Russia, Northwest European Russia, Norway, Poland, Romania, Sicily, South European Russia, Spain, Sweden, Switzerland, Tunisia, Turkey, Ukraine, and West Siberia. Introduced: Canada--Manitoba, Newfoundland, Ontario, Quebec; Russia--Sakhalin; United States--ME, MA, MI, NY, OH, PA, VT, and WI
Attracts
Bees; Butterflies; Hummingbirds; Pollinators; Songbirds
Play value
Attractive Flowers; Colorful; Defines Paths
Food & Medicine
Fruit type
Capsule

Uses (ethnobotany)

Once used to treat a sore throat.

Landscape Use
Landscape location
Naturalized Area; Woodland
Landscape theme
Cottage Garden; English Garden
Design feature
Border; Mass Planting; Small groups
Garden tags
#English garden #showy flowers #border planting #purple #cottage garden #moist soil #herbaceous perennial #deciduous #naturalizes #tubular flowers #hairy leaves #well-drained soil #summer flowers #partial shade tolerant #shade garden #rich soils #bell-shaped flowers #perennial #woodland #wildflower #clumping #deer resistant #moth friendly
Problems & Resistance
Resistant to
Deer
Propagation
Division; Seed

Planted at Hunnicutt

Nobody’s planted this one yet.