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Products > Trachelium caeruleum
Trachelium caeruleum - Throatwort
Image of Trachelium caeruleum
Habit and Cultural Information
Category: Perennial
Family: Campanulaceae (Bellflowers)
Origin: Mediterranean (Europe)
Evergreen: Yes
Flower Color: Blue Violet
Bloomtime: Spring/Fall
Fragrant Flowers: Yes
Height: 2-3 feet
Width: 2-3 feet
Exposure: Full Sun
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: 20-25 F
Trachelium caeruleum (Blue Throatwort) - An herbaceous evergreen perennial that grows as a clump to 2 to 3 feet tall and as wide with dark green to reddish-bronze lance shaped leaves that have toothed margins. From spring and summer appear above the foliage 4 to 5 inch wide flattened dome-shaped clusters of 1/2 inch wide star-shaped blue-violet flowers. The flowers are slightly fragrant, somewhat resembling the scent of a lilac. A prolonged bloom appearance through fall can be had by deadheading spent flowers and the plant stays more upright with some support. Plant in full to part sun in most any well-drained soil, actually preferring the alkaline soils common to many western gardens, and give regular irrigation. Trachelium caeruleum remains evergreen in our climate but can be treated more as a semi-hardy deciduous perennial elsewhere, possibly tolerating temperatures as low as 0 F or use as a long blooming annual in even colder climates. It is fairly pest free while also attracting bird and butterflies to the garden. Cut back hard in late winter to keep plant looking its tidiest. It is a fantastic filler plant and great for cut flower use, though some people have a slight allergenic reaction to the flowers, which reportedly can cause a rash. Blue Throatwort is native to areas along the western Mediterranean Sea, in North African (Algeria, Morocco) and Europe (Spain, Italy) and north into Portugal. The name for the genus is derived from the Greek word 'trachelos' meaning "a neck" from its reputed use in the treatment of ailments of the throat, which also corresponds to its common name Throatwort. The specific epithet given to this plant by Linnaeus in 1753 comes from the Latin word 'caerule' which means "blue". This plant is also commonly called the Blue Lace Flower or Umbrella Flower. We have grown this plant at the nursery since 1992. 

This information about Trachelium caeruleum displayed is based on research conducted in our horticultural library and from reliable online resources. We also will relate observations made about it as it grows in our nursery gardens and other gardens we have visited, as well how the crops have performed in containers in our nursery field. We will also incorporate comments that we receive from others and we welcome hearing from anyone with additional information, particularly if they can share any cultural information that would aid others in growing it.