A wide mix of solid and bicolors, representing some of the best of the modern hybrids. These plants are a wonderful addition to the border, putting one a showy display in the summer garden. The large flower heads are collections of round flowers into dense panicles, which are produced atop long stems. Plants are long-lived perennials and are easy to grow. They produce long lasting and slightly fragrant cut flowers, which to me smell like honeycombs. These plants grow from 16-36 inches tall. They are best grown in full or part sun, and a sunny location with good air circulation minimizes mildew diseases, which are the most common problems of these more or less carefree plants. Best displays in moist but well draining soils, they survive periods of drought but flowering is reduced under dry conditions. Phlox put on a showy display as a tall border plant or growing in the back of a mixed flowerbed. After the first flush of flowering begins to end, remove the flowering panicles that are almost finished blooming or cut back the entire plants by one-third; the plants will produce new flowering offshoots and begin blooming gain in a few weeks. Plants will bloom the second or third year. Seeds are large and easy the sow. Mature plants can be divided in spring or early fall. Root cuttings can also be used to propagate new plants, in fact hoeing around the plants often cuts the roots, which sometimes grow into new plants, and these small new plants sometimes convince people that their phlox plants are spreading. Some self-seeding can occur also.
Sow at 64-71F for 4 weeks, move to the fridge for 5 weeks, then move to 55F for germination. Germination is erratic, do not throw away seeds but over winter any ungerminated seeds outside for germination the next spring. Or sow outside in the fall for germination in the spring. Soaking the seeds in hot water for 12 hours before sowing is helpful.