Blue throatwort - Trachelium caeruleum (Care, Characteristics, Flower, Images)

Blue throatwort

Blue throatwort is a perennial with dense clusters of purple flowers. It can be grown as an annual in cooler climates when seeds are started in a cold frame. Cultivars of this plant are available in other colors, such as pink, red, or white.

Scientific classification

Species

Blue throatwort (Trachelium caeruleum)

Asters bellflowers fanflowers and allies

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Herb

Plant Type

Late spring, Summer

Bloom Time

91 cm to 1.2 m

Plant Height

90 cm to 1.2 m

Spread

Green

Leaf Color

8 cm to 10 cm

Flower Size

Blue, White, Purple

Flower Color

Green, Blue

Stem Color

Deciduous

Leaf type

Images of Blue throatwort

Distribution of Blue throatwort

Distribution Map

Blue throatwort is native to the western Mediterranean and the adjacent regions of Northwest Africa and Southwest Europe. It has also been introduced to parts of temperate Europe and the Mediterranean climate zones of the Southern Hemisphere. The plant has been cultivated in various regions beyond its natural range.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Non-saline wetlands

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Blue throatwort

Clump-forming herbaceous perennial up to 3 feet tall and wide (90 cm)

Dark green to reddish-bronze lance-shaped leaves with toothed edges

Flattened dome-shaped clusters of star-shaped blue-violet flowers (10 to 12.5 cm wide)

Fragrant blooms in spring to summer, can be extended by deadheading

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Care Guide for Blue throatwort

Every week

Water

Full sun

Sunlight

20 - 41 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Blue throatwort thrives in Mediterranean-like conditions, preferring consistent soil moisture without waterlogging. It benefits from weekly watering and is resilient to dry spells, especially when grown outdoors. This evergreen plant remains vibrant year-round, taking advantage of natural rainfall during warmer months.

Fertilize: For optimal growth, blue throatwort thrives with monthly high phosphorus fertilization during spring and summer, using a quarter-strength dilution to prevent root burn. In fall and winter, reduce to bi-monthly applications. Water blue throatwort before fertilizing to enhance nutrient absorption and protect the roots.

Pruning: Blue throatwort produces vibrant blue to purple flowers and benefits from early to late spring pruning. Remove dead stems and old growth to enhance air circulation and light access. Avoid late summer or fall pruning to prevent frost damage for a healthy, compact plant that blooms abundantly.

Propagation: Blue throatwort, a hardy perennial from the Campanulaceae family, features vibrant flower clusters. For propagation, spread seeds on well-draining soil, avoiding covering. Maintain consistent moisture and warmth for germination, and transplant robust seedlings carefully to avoid disturbing roots.

Repotting: Blue throatwort thrives as a lush perennial needing repotting every 2-3 years in spring for vigor. Use a slightly larger pot and ensure well-draining soil. Maintain consistent moisture, avoiding waterlogging, as delicate care is crucial for its successful transition.

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