Blue Clips Bellflower flowers

Blue Clips Bellflower flowers

(Photo courtesy of NetPS Plant Finder)

Blue Clips Bellflower in bloom

Blue Clips Bellflower in bloom

(Photo courtesy of NetPS Plant Finder)

Height: 8 inches

Spread: 8 inches


Hardiness Zone: 2a

Other Names: Carpathian Harebell, Carpathian Bellflower

Ornamental Features

Blue Clips Bellflower is draped in stunning blue bell-shaped flowers at the ends of the stems from late spring to late summer. Its round leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Blue Clips Bellflower is a dense herbaceous perennial with a mounded form. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This is a relatively low maintenance plant, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting butterflies to your yard. It has no significant negative characteristics.

Blue Clips Bellflower is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • Border Edging
  • General Garden Use
  • Container Planting

Planting & Growing

Blue Clips Bellflower will grow to be about 8 inches tall at maturity, with a spread of 8 inches. Its foliage tends to remain low and dense right to the ground. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 5 years.

This plant does best in full sun to partial shade. It is very adaptable to both dry and moist locations, and should do just fine under typical garden conditions. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. Consider applying a thick mulch around the root zone over the growing season to conserve soil moisture. This is a selected variety of a species not originally from North America.

Blue Clips Bellflower is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It is often used as a ‘filler’ in the ‘spiller-thriller-filler’ container combination, providing a mass of flowers against which the thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

Campanula, Carpathian Bellflower, Carpathian Harebell, Tussock Bellflower ‘Blue Clips’


Alpines and Rock Gardens


Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade




Foliage Color:



6-12 in. (15-30 cm)


12-15 in. (30-38 cm)

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)


USDA Zone 2a: to -45.5 °C (-50 °F)

USDA Zone 2b: to -42.7 °C (-45 °F)

USDA Zone 3a: to -39.9 °C (-40 °F)

USDA Zone 3b: to -37.2 °C (-35 °F)

USDA Zone 4a: to -34.4 °C (-30 °F)

USDA Zone 4b: to -31.6 °C (-25 °F)

USDA Zone 5a: to -28.8 °C (-20 °F)

USDA Zone 5b: to -26.1 °C (-15 °F)

USDA Zone 6a: to -23.3 °C (-10 °F)

USDA Zone 6b: to -20.5 °C (-5 °F)

USDA Zone 7a: to -17.7 °C (0 °F)

USDA Zone 7b: to -14.9 °C (5 °F)

USDA Zone 8a: to -12.2 °C (10 °F)

USDA Zone 8b: to -9.4 °C (15 °F)

USDA Zone 9a: to -6.6 °C (20 °F)

USDA Zone 9b: to -3.8 °C (25 °F)

Where to Grow:

Grow outdoors year-round in hardiness zone

Can be grown as an annual



Bloom Color:

Medium Blue


Bloom Characteristics:

Flowers are good for cutting

Bloom Size:

Unknown – Tell us

Bloom Time:

Late Spring/Early Summer

Mid Summer

Other details:

Unknown – Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing the rootball

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:

Glen Avon, California

Pedley, California

Rubidoux, California

Sebastopol, California

Sunnyslope, California

Seymour, Connecticut

Winsted, Connecticut

Boise, Idaho

Rockford, Illinois

Wilmette, Illinois

Olathe, Kansas

Westford, Massachusetts

Dearborn Heights, Michigan

Detroit, Michigan

Owosso, Michigan

Stephenson, Michigan

Hopkins, Minnesota

Minneapolis, Minnesota(3 reports)

Rochester, Minnesota

Florence, Mississippi

Jackson, Missouri

Norfolk, Nebraska

Bridgewater, New Jersey

Denville, New Jersey

Coram, New York

Dayton, Ohio

, Ontario

Bend, Oregon


Mill City, Oregon

Emmaus, Pennsylvania

Johnsonburg, Pennsylvania

Farmington, Utah

Salt Lake City, Utah

Arlington, Washington

Arlington Heights, Washington

Brewster, Washington

Oso, Washington

Smokey Point, Washington

Vancouver, Washington

Eau Claire, Wisconsin

Madison, Wisconsin

Oconto, Wisconsin

show all

Culture November 2016

Perennial Solutions: Campanula carpatica ‘Rapido Blue’
By Paul Pilon

Many growers use one or more types of campanula in their perennials programs. One of the bellflowers commonly produced is Campanula carpatica. Kieft Seed recently introduced an exciting new first- year flowering C. carpatica cultivar named ‘Rapido Blue’.

‘Rapido Blue’ has many desirable attributes, but one of the most notable as its name implies is its quick and early bloom time. ‘Rapido Blue’ blooms up to four weeks earlier than previous cultivars in the species. In addition to its quicker time to flower, ‘Rapido Blue’ has several other desirable attributes. This cultivar demonstrates excellent vigor, great uniformity, good heat tolerance, maintains a compact growth habit and puts on a very showy display of color.

Campanula ‘Rapido Blue’ forms low cushion shaped mounds of small dark green serrated triangular shaped leaves with wavy edges. In the late spring, it develops an abundance of large 11⁄2- to 2-inch upward facing, rich violet-blue flowers. When blooming, this compact perennial reaches only five to seven inches tall and only grows slightly wider than that across. Flowering continues well into the summer.

Campanula carpatica can be grown across most of the country and are hardy in USDA Hardiness Zones 3 to 9. It grows well in locations with rich, moist, but not wet soils. In the North, this is a great candidate for sunny locations, but prefers partial shade in warmer locations. Bellflowers are good for attracting hummingbirds into gardens, but aren’t appealing at all for critters such as dear and rabbits.

In the landscape, this low-growing plant can be an eye-catcher in the front of borders, along paths in rock gardens or used as a showstopper in mass plantings. Its tidy size, yet floriferous nature makes it a great component in mixed containers or ‘Rapido Blue’ can also be used as a showy indoor novelty pot plant. It’s easy to grow and provides great shelf appeal, spurring impulse purchases while it’s blooming.


Campanula carpatica ‘Rapido Blue’ can easily be started from seed. It’s recommended to sow four seeds per cell in 288 or larger sized plug trays filled with a well-drained soilless media. Do not cover the seeds after sowing; light is required for germination.

The seed flats should be moistened and moved to a warm environment, where the temperatures can be maintained at 65 to 70o F for germination. Many growers utilize germination chambers during this stage to provide uniform moisture levels and temperatures. Maintain high relative humidity levels (95 percent), soil temperatures between 65 and 72° F, and moisture level 4 until the radicles emerge from the seeds. Germination typically occurs within seven to nine days after sowing.

Following germination, the temperatures can be reduced slightly to 65 to 68° F, the humidity kept at ambient levels and the moisture reduced to between level 3 and level 4. Fertilizers can be applied when the true leaves are beginning to develop, applying 100-ppm nitrogen every irrigation, using a balanced water-soluble source with micronutrients.

To prevent premature flowering, all stages of plug production should occur under short day lengths, preferably less than 13 hours. When grown at the temperatures mentioned above, ‘Rapido Blue’ will reach a transplantable size in approximately nine to ten weeks.


Campanula ‘Rapido Blue’ is ideal for production in small containers; one quart to one gallon sized pots are ideal. Many commercially available growing mixes will work well, provided they provide enough drainage. Plant one plug into the center of small containers; large containers will require multiple liners (two to three plugs into 1-gallon pots) to create fuller appearing plants. Avoid planting the plugs too deeply, they should be planted so the soil line of the plug and the surface media of the container they are being planted into is even. Planting the crown too deeply often leads to crop variability and losses. Many growers opt to apply a broad spectrum fungicide drench after planting.

Bellflowers are light to moderate feeders and perform best when either constant liquid fertilization is applied feeding at rates of 100- to 125-ppm nitrogen or applying higher rates of 200 ppm as needed. Controlled-release fertilizers can also be incorporated into the growing mix using a rate equivalent to 1.0 pounds of elemental nitrogen per cubic yard of growing mix. Maintain a slight acidic pH of 5.8 to 6.2 throughout the production cycle.

Campanula requires average amounts of irrigation. Avoid keeping them consistently wet or overly dry growing conditions. When irrigation is needed, water thoroughly and allow the medium to dry between waterings.

With its compact growing habit, it’s not usually necessary to implement height management strategies when growing campanula ‘Rapido Blue.’ If the plants do require toning, many plant growth regulators are effective at reducing stem elongation on this type of campanula. They are particularly sensitive to applications of paclobutrazol (Bonzi, Paczol or Piccolo) and uniconazole (Concise or Sumagic); application of these products could lead to over-growth regulation if not used judiciously. Consider making one or two spray applications of 2,500-ppm daminozide (B-Nine or Dazide) if height management is necessary.

Insects and Diseases

There are several insect pests and diseases known to be observed on campanula from time to time; however, most of them do not cause significant damage. Growers may find aphids, spider mites, Western flower thrips and whiteflies feeding on them on occasion. The most common diseases which infect bellflowers are Botrytis and crown/root rots caused by the pathogens Pythium and Rhizoctonia. Of these pests and diseases, crown and root rots are the most prevalent and can largely be avoided by planting them at the right depth and maintaining good irrigation practices. Routine scouting can detect these problems early and can be helpful when determining if control measures are required.

Temperature and Scheduling

Campanula carpatica ‘Rapido Blue’ is a great item for mid spring through early summer sales. Flowering plants of this cultivar can be easily achieved when following a few key guidelines.

‘Rapido Blue’ is a first-year flowering perennial and does not require vernalization for flowering. They can be started from seed and will easily and uniformly bloom during the same growing season or produced as a traditional perennial and planted in the summer or fall the year prior to selling them in flower.

The photoperiod or day length has a great influence on flowering and final plant quality. They are obligate long day plants and will easily flower when the day lengths are 14 hours or longer.

In many instances, they will bloom before the containers have filled out (as mentioned above, they’ll even flower in the plug trays). For this reason, it’s very important to maintain day lengths of 13 hours or less during all stages of plug production as well as for the first several weeks of production after they have been transplanted into the final container size. This can be accomplished by most growers by planting them in late March or early April since natural day lengths reach 14 hours in most locations in late April.

If earlier flowering is required, ‘Rapido Blue’ can be planted earlier when the days are naturally short. After they have bulked up for a few weeks long days can be provided using photoperiodic lighting. The most common method of providing long days is to use night interruption lighting (10 p.m. to 2 a.m.) delivering 10 foot-candles of light throughout this period. Once flower buds are visible, growers can remove the lighting and produce them under natural day lengths for the remainder of the crop.

The time to bloom after the onset of long day lengths is a function of temperature. Campanula ‘Rapido Blue’ grown at 68° F as little as eight weeks to flower, while plants grown at 60° F will flower in approximately 12 weeks.

The best quality is achieved when plants are grown in full sun or in greenhouses with high light intensities. Temperatures can also influence the plant’s appearance. The highest quality plants with the largest and most intensely colored blooms are obtained when they are grown at around 60 to 65° F. Cool night temperatures below 50° F will cause the leaves to appear puckered or curled. Production temperatures over 68° F will reduce the overall plant size as well as reduce the size of the flowers.


Campanula carpatica ‘Rapido Blue’ is brought to the market by Kieft Seed ( To obtain seed, contact your Ball sales representative ( Plug flats are widely available and can be obtained through your Ball sales representative or various reputable perennial plug producers.

Paul Pilon

Paul Pilon is a horticultural consultant, owner of Perennial Solutions Consulting ( and author of Perennial Solutions: A Grower’s Guide to Perennial Production. He can be reached at 616.366.8588 or .

  • Home
  • Jelitto Perennial Seeds ”
    • Contacts
    • About us
      • Founder Klaus R. Jelitto
    • 50 Years
      • Our next 50 years
      • Klaus R. Jelitto: My Recollections of 50 Years in the Seed Trade
    • Certificates
      • Energy Certificate
      • Organic Certificates
    • Gold Nugget Seed®
    • JET® seeds
    • Production
    • Breeding
      • Jelitto’s Cultivars / New Introduction
    • Seed technology
    • New Varieties
      • New Varieties 2020
      • New Varieties 2019
      • New Varieties 2018
      • New Varieties 2017
      • New Varieties 2016
      • New Varieties 2015
      • New Varieties 2014
      • New Varieties 2013
      • New Varieties 2012
      • New Varieties 2011
      • New Varieties 2000-2010
        • New Varieties 2010
        • New Varieties 2009
        • New Varieties 2008
        • New Varieties 2007
        • New Varieties 2006
        • New Varieties 2005
        • New Varieties 2004
        • New Varieties 2003
        • New Varieties 2002
        • New Varieties 2001
        • New Varieties 2000
      • New Varieties 1990-1999
        • New Varieties 1990
        • New Varieties 1999
        • New Varieties 1998
        • New Varieties 1997
        • New Varieties 1996
        • New Varieties 1995
        • New Varieties 1994
        • New Varieties 1993
        • New Varieties 1992
        • New Varieties 1991
    • Events
  • Seed
    • Range of products
    • Perennials
    • Organic Seed
    • Ornamental Grasses
    • Herbs
    • JET®
    • Annuals
    • Biennials
    • Jelitto’s Cultivars
    • Green Roof
    • Mixtures
    • New to our range 2019
    • New to our range 2020
    • Special Collections
      • Butterfly Garden
      • Thistles
      • Salt tolerant
      • Sowing Beauty
      • Blackbox Gardening
      • Pantone
      • Cocktail Garden
      • Edible Flower
      • Fairy Gardens
      • Pollinator friendly plants
      • Spring Flowering
      • Summerflowers
      • Tea Gardens
    • Random browse
  • Other ”
    • Help
      • Questions on searching
      • Questions on items
      • Questions on plant information
      • Questions on how to order
      • Questions on import
      • Questions on extra costs
      • Questions on delivery
      • Questions on payment
      • Questions on order processing
      • Questions on My Jelitto
    • Tracking
    • Printed Stick Labels
    • Catalogue
    • Order Forms
      • Order Form
      • Fax Order Form
      • Fax Order Form Japan
    • Free Downloads
      • Catalogue
      • Organic Certificates
      • Assortment (xls)
      • Genetic Technology
    • Books & CD
    • Vouchers
  • Plant Information ”
    • Common Names
    • Plant Hardiness Zones
      • Plant Hardiness Zones – Australia
      • Plant Hardiness Zones – Canada
      • Plant Hardiness Zones – Japan
      • Plant Hardiness Zones – USA
      • Plant Hardiness Zones – Europe
    • Plants of the Year
      • Plants of the Year/Germany
      • Perennials of the Year/Germany
      • Medicinal Plants of the Year/Germany
      • Herb of the Year/Germany
      • Perennial Plants of the Year/North America
      • Cutflowers of the Year/North America
      • Perennial Plants of the Year/Sweden
    • Sowing directions
    • Tips & Tricks
      • Recommended growing techniques for Lupins
      • Storage and Sowing of GOLD NUGGET SEED®
      • Properly storing and handling seed
      • Stratification
      • Seed Sowing techniques
      • Suitable Moisture
      • Tiny Seeds / Big Seeds
      • Providing the proper treatment for optimum germination
      • More About Sow Cold Germinators

Campanula Carpatica is a plant with flowers that come back every year from the Campanulaceae family, and native to central Europe.

This plant is an herbaceous perennial, which produces blue bell-shaped flowers on long stems.

For garden use, various Campanula flower varieties are produced in shades of purple, pink, blue, and white.

It was introduced by Nikolaus Joseph von Jacquin in 1977 at Kew to the Royal Botanic Garden and earned the Award of Garden Merit by the Royal Horticultural Society.

The common names for Campanula Carpatica include:

  • Tussock bellflower
  • American harebell
  • Carpathian harebell
  • Carpathian bellflower

Campanula Carpatica Plants Care

Size & Growth

This plant type is clump-forming growing about 11” inches tall and 8” – 12” inches wide.

It has rounded and long-stalked green leaves, which are about 4” – 7” large.

Flowering and Fragrance

During late spring, Carpathian bellflower produces upward-facing, bell-shaped, 1” – 2” inches violet-blue flowers.

The flowers continue to bloom in the early summer.

In some cases, rebloom might occur through the summer to early fall.

Light & Temperature

Campanula Carpatica loves to grow under the full sun.

However, it prefers part shade during the hot late summer season.

It grows best on a sunny wall if its roots have sufficient soil.

This plant is cold tolerant and survives cold temperatures around 28° degrees Fahrenheit (-2° C).

USDA hardiness zone 3 – 9.

Watering and Feeding

This plant prefers the soil to be evenly moist but not soggy.

As for its water needs, the water must be room temperature.

When using tap water, it’s best to let it sit for 24 hours, so the chemicals in the water are removed.

Water the plant if the top layer of the soil is dry when touched.

Avoid letting the soil completely dry out between watering.

Feed the plant with general fertilizer during the spring season, and again in mid-summer.

Soil & Transplanting

Carpathian bellflower likes well-drained, moist, and fertilized soil types.

It grows well in alkaline or neutral soil pH when placed in a sunny position.

It tolerates somewhat partial shade too.

If the plant is potted, there must be a sufficient amount of drainage holes.

Growing this plant in baskets is ideal as it allows proper drainage and airflow.

Grooming and Maintenance

Deadhead the plant to encourage new flower growth rate.

After its bloom time, the plant should be pruned to around an inch from the soil.

There’s a high chance it will bloom once again.

Air circulation is essential for this plant.

Secure a fan to direct air towards the plant but ensure the fan isn’t directly pointed at it.

Make sure to remove any dead leaves or stems.

Properly water the plant and avoid overwatering.

It’s important to watch for any signs of pests or diseases and take immediate action to control the issues before it damages the plant.

How to Propagate Carpathian Bellflower

Propagate the bellflower plant through seeds.

  • Take four seeds and sow them in a large plug tray with soilless well-draining media.
  • Avoid covering the seeds, as this plant requires light for the germination process.
  • The seeds must stay moistened and transferred into a warm climate, with temperatures between 65° – 70° degrees Fahrenheit (18° – 21° C).
  • Germination chambers are used for this process to offer the plant a consistent temperature and moisture levels.
  • Provide a higher level of humidity until roots start forming.
  • The germination process takes place seven to nine days after the seeds are sowed.
  • After this process is complete, lower the temperature to 65° – 68° degrees Fahrenheit (18° – 20° C).
  • As the leaves start emerging, feed the plant fertilizer with sufficient micronutrients.

Carpathian Bellflower Pest or Diseases

There are various pests and diseases this plant may experience from time to time.

However, there aren’t any serious problems or significant damages caused by these problems.

Be on a lookout for:

  • Whiteflies
  • Western flower thrips
  • Spider mites
  • Aphids
  • Vine weevils
  • Snails and Slugs

The common diseases affecting this plant are:

  • Crown and root rots
  • Botrytis blight
  • Southern blight
  • Ramularia
  • Septoria leaf spot
  • Rust
  • Powdery mildew treatment

Root and crown rot is the most prevalent issue with Campanula Carpatica, which is mostly caused by Rhizoctonia and Pythium.

This rotting problem must be avoided by growing this plant at sufficient depth and following the right irrigation practices.

It’s best to scout this plant regularly to detect these issues early on, so the correct measures are taken to resolve any issues.

You may also like

Buying Alpines from Jacksons Nurseries

At Jacksons Nurseries we lightly trim back our alpines after flowering to ensure that the plants remain neat and tidy whilst in the pot. The more tender the plant the less we cut back to help protect exposed stems from winter frost. Depending on the plant variety we will then prune back further in spring once the risk of the more severe frosts is over.

As a result, depending on the time of year you buy alpines, they may not look like images showing their ‘prime time’ in flower and looking at their best.

Availability: Stock availability figures are provided as a guide only. There is a delay between orders being placed and the plants being gathered by our pulling team. During this time it may be possible for a member of the public to purchase these plants from our Garden Centre, while this is rare it is a possibility and we will notify you of any problems as soon as possible. This figure may also include plants that have not yet be flagged as unsaleable.

Pre-order: Pre-order times are given as a guide only and may vary dependent on the growing season. Orders containing Pre-ordered products will be shipped as a single order when all items become available. Large orders may be part shipped, please contact us on 01782 502741 or email [email protected]

From late autumn onwards and dependant on variety, there may be very little visible above the soil except for a few cut back dormant leaves or stems. It is perfectly normal for dormant plants to look like this from autumn onwards, they will however burst back into life in spring.

Leave a Reply

Your email address will not be published. Required fields are marked *