Garden Phlox (Phlox paniculata) is also known as Tall Phlox or Summer Phlox, as opposed to the low-growing spring phloxes. Garden Phlox is a perennial wildflower that is native to the Eastern United States and is hardy to USDA zones 4-8.
True to its common names, this phlox blooms in high summer and grows to three to four feet high. The flowers are visited by many kinds of pollinators.
Garden Phlox needs a location in full sun to do best and it likes moist, but well-draining soils. For a neater appearance, deadhead the flowers when they start to fade.
This plant is susceptible to powdery mildew, which is unattractive, but not deadly. To prevent it, chose cultivars that are bred to be more mildew-resistant and plant it where it can get good air circulation.
Phlox ‘David’ has a pure white flower and has been a garden mainstay for many years now. Phlox ‘Jeana’ is a newer introduction that has purple-pink flowers and superior mildew resistance. Other great performing phlox cultivars to try include ‘Glamour Girl’, ‘Delta Snow’, ‘Lavelle’, ‘Robert Poore’, and ‘Shortwood’.
Read more about phlox cultivars in the phlox trial report at the Mt. Cuba Center website (https://mtcubacenter.org/).
Garden Phlox - You Can Grow That!
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