Genus Trachelium

Synonyms: Diosphaera

From the Mediterranean region comes seven or so species of small perennials with tiny leaves and tubular flowers with spreading lobes. The genus name comes from Greek and means "rough throat," a reference to its use in treating neck and throat ailments. Taller species can be used in borders, and make excellent cut flowers. Dwarf species can be used in rock gardens, troughs, or alpine houses.
Care: In the garden, grow in well-drained soil in full sun with some shade at midday. Can also be grown in an alpine house.
Propagation: Seeds of hardy species should be sown in a cold frame as soon as they are ripe, while those of tender or half-hardy species should be sown at 55° to 61°F in early spring, or where they are to grow in late spring. Take softwood cuttings in early summer.
Problems: Aphids and spider mites may be a problem in the greenhouse.

Species, varieties and cultivars for genus Trachelium

Trachelium caeruleum
(Blue throatwort) Be the first to rate this plant

Hardiness Zones:

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.