Blue throatwort (Trachelium caeruleum) Genus:  Trachelium This species bears dome-shaped flower heads several inches across that are crowded with tiny, tubular amethyst or white flowers that look somewhat like the blooms of an allium. It has lance-shaped, toothed leaves in hues of cordovan purple or deep green brushed with plum highlights. It blooms over a long season. Though it is a perennial, blue throatwort performs wonderfully as an annual and blooms summer to fall. Plants grow to about 3 feet tall and wide. Noteworthy Characteristics:  Excellent cut flowers. Care:  Provide neutral to slightly acidic, well-drained soil in full sun with some shade in the heat of the day. Propagation:  Sow seed in a cold frame when ripe or at 55° to 60°F in spring, or where they are to bloom in late spring. Rooted cuttings may be overwintered in a protected place. Problems:  Aphids, spider mites.

Overview

Height 1 ft. to 3 ft. Spread 1 ft. to 3 ft. Growth Habit Clumps Growth Pace Moderate Grower Light Full Sun Only Moisture Medium Moisture Maintenance Low Characteristics Attracts Song Birds, Attracts Butterflies, Showy Flowers, Showy Foliage Bloom Time Early Fall, Late Summer, Summer Flower Color Blue, Purple, White Uses Beds and Borders, Cut Flower, Container, Suitable as Annual Style Cottage Garden, Herb Garden Seasonal Interest Summer Interest Type Perennials