Luminary® Ultraviolet Tall Garden Phlox

Luminary® ‘Ultraviolet’ is a tall garden phlox with dark magenta-violet flower panicles over bright green foliage. Proven Winners lists a mature height of 32–36 inches, a spread of 28–32 inches, summer-through-fall flowers, and USDA hardiness zones 3a–8b ([Proven Winners](https://www.provenwinners.com/plants/phlox/luminary-ultraviolet-tall-garden-phlox-phlox-paniculata)). ## In the Garden Site this upright perennial in a border or mass planting with part sun to sun and enough room for its stated spread. Proven Winners notes fragrance, pollinator appeal, and improved disease resistance compared with typical phlox. The page recommends consistently moist, well-drained soil, regular fertilization, and good air circulation. These conditions suit a sunny perennial bed; avoid crowding the stems so air can move through the foliage. The listed size ranges are useful for spacing, while the cultivar’s mature form still varies with growing conditions. ## Maintenance Water when rainfall is limited, keeping the root zone moist but not saturated. Remove faded flower clusters for a tidier display, then cut stems back after the foliage dies down. Clear debris and maintain airflow around the clump as new growth emerges.