In eastern North America where it grows wild as a native, garden phlox, Phlox paniculata, is modest but classic perennial that gets more than four feet tall with pinkish lavender flowers from late summer through early autumn. Modern garden varieties are mostly somewhat more compact with pink, red, light purple or white flowers. Many have fragrant flowers; and some have flowers with lighter or darker centers. Butterflies and hummingbirds dig them all.
Locally, garden phlox probably looks best with slight shade or among other lush plants, only because humidity is so minimal. Otherwise, it would be just as happy out in the open. In well watered gardens with rich soil, it sometimes self sows a bit, but rarely naturalizes continually enough to revert to a more natural (wild) state like it can in gardens on the west coast of Oregon and Washington. Garden phlox can be propagated by division of mature plants either after bloom in autumn or in spring.
Tony Tomeo 
A friend’s parents had some garden phlox that should have won some sort of reward. The plant(s) had been in the same spot for at least 15 years; prior to their planting, their protected corner had been dedicated to tomatoes. The plant grew to be six feet tall and even more feet across. When they finally decided to dig it up, there was a root ball so large it took two men to lift it, and it only perched on the sides of a wheelbarrow.
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This is one of those many plants that everyone else seems to be familiar with, but that I had only recently met. Prior to that, I had never seen it before. I still have no idea where it came from. It just appeared in one of our landscapes, and stayed because it is so perfectly white. Heck, I would not mind if it were another color. It is so pretty and fragrant.
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