Phlox
Phlox Garden Girls
Phlox paniculata
Also known as: Garden Girls Disease-Resistant Phlox, Garden Phlox
- Perennials
- Zone 3a
- Full Sun
- Medium
- 60–80 cm
- 45–60 cm
- 45–60 cm
- Low
- Thriller
Bloom window: Mid to Late Summer
Phlox Garden Girls is a disease-resistant garden phlox series selected for cleaner foliage and reliable summer color. Upright fragrant flower heads suit sunny perennial borders and cutting gardens.
- Soil
- Well-drained, Loam
- Native status
- Introduced
- Growth rate
- Moderate
- Flower colour
- Pink, Purple, Red
- Foliage colour
- Green
- Foliage habit
- Deciduous
- Landscape use
- Border, Cut flower, Mass planting
- Attracts
- Bees, Butterflies, Hummingbirds
- Resistant to
- Disease
Care guides
Watering
Water Phlox Garden Girls deeply whenever the top 3–5 cm of soil dries during spring establishment and peak bloom. A thorough weekly soak usually outperforms light daily misting, especially on Manitoba clay that crusts in wind. Maintain even moisture through the bloom window, then ease back slightly as plants prepare for dormancy. Keep water off foliage late in the evening when possible to reduce foliar disease pressure.
Sunlight
Phlox Garden Girls (Phlox paniculata) should be placed in full sun. For strongest stems, colour, and flower or fruit production, provide at least 6 hours of direct daily sun, with morning light especially valuable before intense Manitoba afternoon heat. Sites under dense tree canopies or on the north side of buildings typically produce leggy growth, fewer buds, and weaker colour—avoid those locations for this plant. At a mature size around 60–80 cm, give neighbouring plants enough space so they do not shade out the crown as the season progresses.
Pruning
Deadhead spent blooms on Phlox Garden Girls through the season to tidy the clump and, for many varieties, encourage side shoots or a lighter rebloom. After hard frost, cut deciduous stems back to a few centimetres above the crown, or leave ornamental seed heads standing for winter structure and wildlife if the stems stay sturdy. In early spring, clear remaining straw-like foliage before new shoots emerge. Divide crowded clumps every few years in spring or early fall to renew vigour and flowering.