Rough Blazing Star has tall spikes of purple flowers appearing from late summer into fall. Unlike many flowering plants, the blooms open from the top downward. It naturally grows in dry prairies, savannas, and open woodlands. It prefers well-drained soils and adds dramatic vertical interest to native gardens. It is very drought tolerant once established and requires good drainage. It does not like wet winter soils. It does best when planted in groups.