Growing Vernonia (Ironweed)

Latin Name Pronunciation: ver-no' nee-ah

Vernonia is a large genus of perennials, shrubs, and trees in the Asteraceae (Aster) family. Thirty-plus native North American species and subspecies with great ecological value are tolerant of both dry conditions and periodic inundation. Compact Vernonia lettermannii cultivars and hybrids are ideal for low-maintenance landscapes and pollinator gardens.

Light: Best in full sun (or partial shade in the South).

Soil: Grows naturally in gravelly or sandy poor soil, adapts well to average, moderately well-drained garden soil.

Watering: Once established, little supplemental water is needed, except in severe drought, as plants tolerate both drought and periodic water inundation and may splay open late in the season if kept continuously wet.

Fertilizing: An occasional light application of compost is beneficial, but fertilizer is not recommended, as Vernonia does best without excess fertility.

Seasonal Care: Vernonia is late to emerge in spring, so mark its location well when planting. Cut plants back by half in early summer to promote strong dense growth. Allow plants to stand through the winter – they remain attractive and sustain seed-eating birds – and cut back to the ground in early spring.

Pests/Diseases: Garden cultivars are unlikely to be affected by pests or diseases. Mature plants have somewhat bitter leaves that are relatively unappealing to deer.