Plumbago auriculata aka Plumbago

Plumbago auriculata, or Cape leadwort, is an evergreen shrub. It belongs to the Plumbaginaceae family. Its native range runs from Mozambique to South Africa. Growers also know it as Plumbago capensis. It forms a loose mound with long, arching branches. Garden plants reach about 6–13 feet [1.8–4 metres] tall. Reports extend to 15 feet [4.6 metres], or higher with support. Spread ranges from 3–10 feet [1–3 metres], depending on growing conditions.

Thin stems trail or climb when tied to a support. The plant can send up shoots from its roots. Young stems are green, and some bear fine hairs. The pale green leaves grow in an alternate pattern. Each leaf is simple, with a smooth edge. Leaves have a spoon-like shape and reach about two inches long. The plant keeps its leaves in warm conditions. Its stems and bark add little visual interest.

Pale blue flowers form clusters at the ends of new shoots. Each flower has a long tube and five spreading lobes. The flowers have a light scent and draw butterflies. Bloom runs from summer into fall in seasonal gardens. In warm conditions, flowers may appear throughout the year. Small brown capsules follow the blooms. These dry, narrow fruits have sticky, barbed surfaces. Florida's plant guide describes them as hard to notice.

Full sun gives the best growth and bloom. The plant also tolerates some shade. It needs fertile soil that drains well. It grows in sand, loam, or clay. High soil pH may cause yellow leaves through mineral shortages. Established plants tolerate drought, and sources also report salt tolerance. Water container plants well during growth, but little during dormancy. Sources list USDA zones 9–11 and UK rating H2. Frost can kill top growth, though roots may send up new shoots. In cold areas, growers keep pots indoors for winter.

Gardeners use it for hedges, borders, ground cover, and containers. Its branches can spill over walls or grow along fences. Frequent hedge trimming removes many flowers. Prune in late winter or early spring to renew growth. Mites, whiteflies, and cottony cushion scale may attack it. Major diseases are not a usual concern. No edible uses are known. Plant contact can cause redness, blisters, and severe skin irritation. It can also harm pets if they eat it. Wear gloves when handling it. Traditional uses include remedies and dyes, but reports record serious harm from skin treatments.