Garden phlox forms tall clumps topped with colourful flower clusters in summer, with cultivars offering a broad choice of colours for the middle of borders.
- Height
- 60–122 cm / 2–4 ft
- Spread
- 60–92 cm / 2–3 ft
- Light
- Full sun / Partial shade
- Soil moisture
- Moist, well-drained
- Flowering
- Summer
- Maintenance
- Medium
- USDA zones
- 4a–8b
Planting
Choose sun or partial shade and moist, fertile, well-drained soil. Leave room for good airflow and mulch to keep the root zone cool.
Care
Water at soil level during dry summers and remove faded flower heads. In winter, cut down and remove old stems to reduce mildew carry-over; taller stems may need support.
Before planting: Powdery mildew is a common concern, especially where growth is crowded and air circulation is poor.
Planting Garden phlox?
Find a landscaper nearby to help with planting and establishment.
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Sources & photo credit
Plant reference: NC State Extension Gardener Plant Toolbox. Content checked . Flowering seasons vary with local climate; USDA zones describe winter cold tolerance.
- Garden phlox: K. Andre · CC BY 2.0. Resized, converted to WebP and cropped for display.
- Creeping phlox: David J.Stang · CC BY-SA 4.0. Resized, converted to WebP and cropped for display.
- Downy phlox: KENPEI · CC BY-SA 3.0. Resized, converted to WebP and cropped for display.
- Woodland phlox: K M · CC BY 4.0. Resized, converted to WebP and cropped for display.