Height: 6-12 in. (15-30 cm) 12-18 in. (30-45 cm) 18-24 in. (45-60 cm)
Spacing: 12-15 in. (30-38 cm)
Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
On May 20, 2013, plant_it from Valparaiso, IN wrote:
Prairie Phlox typically blooms during late spring or early summer for about 1–1½ months.
The preference is full or partial sun, and moist to mesic conditions. The soil can consist of rich loam, clay loam, sandy loam, or have some rocky material. Foliar disease doesn't bother this phlox to any significant extent. It is difficult to start plants from seeds, but somewhat easier from transplants.
The nectar of the flowers attracts primarily long-tongued bees, butterflies, and skippers. Other visitors include moths and bee flies. Among the bee visitors are bumblebees, Anthophorine bees, Miner bees, and Nomadine Cuckoo bees. Butterfly and skipper visitors include the American Painted Lady, Sulfurs, Swallowtails, and Cloudywings. The caterpillars of the moth Heliothis phloxiphagus (Spotted Straw) eat the flowers, while the caterpillars of the moth Olive Arches eat the leaves. Other insects feeding on this phlox and others include Lopidea davis (Phlox Scarlet Plant Bug) and Poecilocapsus lineatus (Four-Lined Plant Bug). Mammalian herbivores readily consume Prairie Phlox, including rabbits, deer and groundhogs.
On Sep 1, 2012, Erutuon from Minneapolis, MN wrote:
I planted this two years ago (2010). It flowered the second year and this year (2012). My plant of it doesn't have a very good flower color — it's kind of dusty pastel purple, not striking. It's a nice enough plant, but I hope someday I can find a specimen with deeper-colored flowers.