Luminary® Ultraviolet Tall Garden Phlox

Luminary® Ultraviolet Tall Garden Phlox shows off saturated magenta-violet flower panicles that stay bold in summer heat. It reaches about 3236 inches tall and 2832 inches wide, making a solid mid-border anchor with noticeably clean foliage. The big advantage over older garden phlox is the improved resistance to powdery mildew, which is usually what makes customers give up on phlox in humid summers. Phlox paniculata Luminary® Ultraviolet is a North American native selection bred for stronger performance. It blooms from summer into fall with repeat color when conditions are good. The flowers are fragrant and consistently draw bees, butterflies, and hummingbirds, enhancing pollinator and vegetable gardens. Its upright habit also makes it a strong thriller in large containers, offering height and a soft fullness. This is our favorite phlox for fragrance, cut flowers, and no gray stems by August. Luminary Ultraviolet Phlox Care Grow Luminary® Ultraviolet Phlox in full sun for best flowering and the strongest mildew resistance, although part sun works if the site is bright and open. Plant in consistently moist, well-drained soil thats average to fertile, with a slightly acidic to neutral pH (roughly under 7 is fine). Avoid cramped corners and dense plantings, since air circulation helps foliage stay disease resistant. Water at the base when the top couple inches of soil begin to dry, and keep moisture even during bud set and bloom so flowers dont stall. Avoid wetting the foliage if powdery mildew becomes a problem. Phlox responds well to regular feeding. Use an all-purpose granular fertilizer in spring and a light application in mid to late summer to keep blooming strong without weakening stems. Deadhead spent panicles to extend the bloom window and keep the plant looking fresh, especially if you dont want seedlings. If stems get tall and you prefer a fuller mound, cut plants back by about one-third in late spring to encourage branching. Once it goes dormant, cut stems down in late fall and remove debris to reduce carryover disease pressure. Mulch root zone in late fall to help prevent frost heaving in winter. Divide every few years in spring to reinvigorate growth and keep the center from getting woody. Luminary Ultraviolet Phlox Spacing Space plants 2832 inches apart, allowing each clump to fill out and dry around the foliage. For containers, use a pot at least 1618 inches wide so the root zone doesnt dry too fast during peak bloom. It also helps to plant in an area that receives a light breeze from time to time. In the landscape, pair Luminary® Ultraviolet with coneflower for a long pollinator season and switchgrass for movement behind the flower panicles. In containers, combine it with petunias for spill and coleus for foliage contrast that makes the violet tones look even deeper.