Summer Garden Phlox

Proper siting - full to partial sun and humus-rich soil - are key to successfully growing garden phlox (Phlox spp.) (USDA hardiness zones 3-8). Phlox ask for minimal care of seasonal fertilizing, mulching, and supplemental watering in periods of drought. Deadheading also extends the plant's flowering potential.  Select truly superior cultivars and never over-irrigate the garden bed. Finally, avoid overcrowding plants which may result in outbreaks with powdery mildew disease.

2015-17 MT. Cuba Center's Phlox Trial in Greenville, DE. The best performing cultivars of Phlox paniculata are: P. paniculata ‘Jeana’, ‘Glamour Girl’, ‘Delta Snow’, ‘Lavelle’, ‘Robert Poore’, ‘Dick Weaver’, ‘David’, ‘Ditomdre’ (Coral Crème Drop), and ‘Shortwood’.

The best performing selections from other species and hybrid phlox are: Carolina phlox (Phlox carolina ssp. carolina) ‘Kim’ (light pink), Phlox glaberrima ssp. triflora 'Bill Baker', sweetly aromatic, reddish purple flowers  (P. glaberrima ‘Morris Berd’), purplish-pink flowers of P.  x ‘Forever Pink’, P. amplifolia, and P. x ‘Minnie Pearl’ (pure white).

Three P. paniculata favorites:
‘David’ - large, pure white, fragrant flowers; foliage is highly mildew resistant; 2002 Perennial Plant of The Year
'Delta Snow' - grows 3-4 feet tall. Fragrant, snow white tubular flowers with purple eyes; mildew resistant foliage.
‘Jeana’ - long blooming summer phlox cultivar; deep green foliage is topped by conical lavender-pink flowers and mildew resistant foliage.

All three varieties make colorful additions to cut flower arrangements.