Phlox
flower
Fragrant summer perennial — butterflies love it. Prone to powdery mildew; space for airflow and water at the base. Choose mildew-resistant varieties for less maintenance.
At a glance
- USDA Zones
- 3–8
- Sun
- Full sun (6+ hrs)
- Water
- Medium — water when top inch of soil is dry
- Soil
- Loam
- pH
- Neutral
- Spacing
- 18 in. between plants
- Space needed
- A 2×2 ft block of the bed
Planting & harvest windows
Northern Hemisphere timing. Adjust ±4–6 weeks based on your last/first frost dates.
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant | ||||||||||||
| Harvest |
Plant Harvest
Good companions
Recommended varieties
- Davidboth
White, very fragrant, outstanding mildew resistance — AAS winner.
- Lauraboth
Vivid lavender with a white eye — very showy.
- Robert Pooreboth
Deep purple, extremely mildew-resistant, vigorous grower.
Add Phlox to your raised bed — the planner handles spacing and companion warnings automatically.
Open the planner →