RE: Vinca - colour for a hot spot.
The plants are grown for its attractive glossy, green foliage, as well as its flowers. Flowers bloom all summer, and up to frost. Common colors include white, rose, pink, and red. Vinca is commonly used for borders, edging, and ground cover or bedding plants.
Vinca plants are subshrubs or herbaceous, and have slender trailing stems 1–2 m (3.3–6.6 ft) long but not growing more than 20–70 cm (8–27.5 in) above ground; the stems frequently take root where they touch the ground, enabling the plant to spread widely. The leaves are opposite, simple broad lanceolate to ovate, 1–9 cm (0.5–3.5 in) long and 0.5–6 cm (0.20–2.36 in) broad; they are evergreen in four species, but deciduous in the herbaceous V. herbacea, which dies back to the root system in winter.