Garden Phlox

Grow garden phlox in fertile, well-drained soil with a pH of 6.0-7.0 and consistent moisture. Apply compost each spring and provide ample airflow to reduce powdery mildew.

Sun

Full sun

Water

1 in/week, even

Spacing

16 in

First harvest

Perennial; summer bloom

Tips

• Plant at nursery depth at least 16 inches apart, giving large cultivars 24 inches or more.
• Water deeply to supply about 1 inch weekly, directing water to the soil rather than leaves.
• Top-dress with compost in spring and avoid excess nitrogen fertilizer.
• Choose mildew-resistant cultivars and remove badly infected leaves if powdery mildew develops.
• Remove faded flower clusters and divide congested clumps every 3-4 years.