View Garden. While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates.
The description of these plants has been written based on numerous outside resources. Read More. Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. We use cookies on this website, you can read about them here. To use the website as intended please Accept Cookies. Alphabetical Plant Listing. View or Create Collections. Campanulas - Which one for my Garden? Bellflowers are cold-hardy , mostly growing in Zones 4 to 8.
They prefer cool summer climates and are generally intolerant of extreme heat. Growth habits varies across species and cultivars. Some are stately, tall garden plants which are excellent choices for borders or cutting. Other Bellflowers are mat-forming or creeping and are perfect for edging or in rock gardens. There is a vast array of flower color, ranging from blue, white, pink to purple, and flower shapes tubular, bell, star, cup or saucer shaped. Choose your Bellflowers carefully.
While many are well-behaved or easy to control, some are vigorous spreaders and seeders which can crowd out less vigorous companion plants. Among these black sheep are Campanula rapunculoides Creeping Bellflower , Campanula takesima Korean Bellflower and Campanula punctata Spotted Bellflower which can be quite aggressive. Most Bellflowers offer a long season from late spring to late summer or early fall. Deadheading spent flowers will encourage additional blooms. Campanulas are relatively easy to grow.
They perform best in full sun or part shade , in average , medium moisture , well-drained soils. Campanulas do not have serious disease or pest problems. Watch for slugs and snails. Some bellflowers grow low to the ground and are often used as groundcovers. In spring or early summer buds appear on thin stalks, with each stalk supporting only one upward-facing flower.
Numerous flowers open at the same time, providing a mass of color. The first flush of bloom lasts up to one week or more, after which the plants can be deadheaded for a smaller repeat flush in early fall.
Carpathian harebells, like the White Clips cultivar Campanula carpatica f. Length of bloom time is especially important to gardeners who grow bellflowers to use for cut flower arrangements. Some varieties of taller species, like Canterbury bells and peach-leafed bellflower, make good cut flowers. A selection of five or so in a clay pan or sink always works well. Choose one or two of the mat-forming varieties, such as Campanula cochlearifolia fairy thimbles and C.
Some border campanulas are also suited to containers. Traditionally, C. Campanula lactiflora the milky bellflower is really versatile. It has sprays of mid-blue starry flowers from late June and grows to 1.
Cultivars are equally useful and magnificent at the back of the border — C. If you cut back as they fade, the flowering season can be extended into late summer. It is quite hard to find the correct form of this, so try to buy it in flower if in any doubt. Slugs and snails are rather partial to some of the dwarf alpine forms, so sharp grit and beer traps help keep them at bay.
Orange-coloured rust on the undersides of foliage can affect some of the border campanulas. Low growing spreading. Height: 2in 5cm. Good for shade. Height: 4 in 10cm. Campanula carpatica 'Blaue Clips'. Height and spread: 1ft 30cm. Height: 2ft 60cm. Height: 1. Height: 3ft to 4.
Popular garden variety and a good self-seeder.
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