Alphabetical Plant Listing

Trachelium caeruleum (Throatwort)

Blue Throatwort, Throatwort


Tough and undemanding, Trachelium caeruleum (Throatwort) is an upright perennial, often grown as an annual, forming a clump of stems clothed with sharply toothed, lance-shaped, dark green leaves. Blooming over a long summer season, small, slightly fragrant, violet-blue flowers held in large domed clusters, 6 in. across (15 cm), appear above the foliage. Rich in nectar, they attract birds and butterflies to the garden and make good cut flowers. Evergreen in mild winter climates.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society
  • Grows up to 24-36 in. tall and wide (60-90 cm).
  • Performs best in full sun in moderately fertile, well-drained soils. Water freely in dry weather.
  • Perfect addition to beds and borders, wall-side borders, cottage gardens, city gardens or containers.
  • Generally pest and disease free.
  • Remove spent flowers to encourage more blooms. Cut back after flowering.
  • Propagate by seed sown at 60ºF (16ºC) in spring.
  • Native to the Mediterranean region.

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Requirements

Hardiness 9 – 13
Heat Zones 1 – 12
Climate Zones 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Height 2' – 3' (60cm – 90cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 30" – 36" (75cm – 90cm)
Water Needs Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Attracts Birds, Butterflies
Garden Uses Beds and Borders, Patio and Containers, Wall-Side Borders
Garden Styles City and Courtyard, Informal and Cottage

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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.


Requirements

Hardiness 9 – 13
Heat Zones 1 – 12
Climate Zones 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Height 2' – 3' (60cm – 90cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 30" – 36" (75cm – 90cm)
Water Needs Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Attracts Birds, Butterflies
Garden Uses Beds and Borders, Patio and Containers, Wall-Side Borders
Garden Styles City and Courtyard, Informal and Cottage

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