Crops & Breeds › Flower Garden
🌸 Phlox
Flower Garden · growing reference
| Days to maturity | 80 days – ~1 year, by type |
|---|---|
| Germination | 12 days |
| Direct sowing | +5 days vs transplants |
| Spacing | 8″ in the row × 12″ between rows |
| Planted as | seed |
| Water | ~1–1.5 in a week |
When to plant
In USDA zone 6, for example: Plant out around Apr 22, once your last frost has passed.
| Spring | |
|---|---|
| Zone 3 | May 22 |
| Zone 4 | May 14 |
| Zone 5 | May 3 |
| Zone 6 | Apr 22 |
| Zone 7 | Apr 8 |
| Zone 8 | Mar 22 |
| Zone 9 | Feb 27 |
Dates are the typical window for each zone's average frost dates — your own last frost can differ by a couple of weeks. Zone 10 and warmer is effectively frost-free: plant to the season, not the frost. Southern Hemisphere: shift six months.
Phlox Types
- Annual · 80 days · 10–25 stems/plant — Drummond phlox (P. drummondii) — the seed-grown bedding annual; blooms year one.
- Garden · ~1 year · 10–25 stems/plant — P. paniculata — the tall fragrant perennial border phlox; midsummer.
- Creeping · ~1 year · 50–150 blooms/plant — P. subulata — the spring moss-phlox groundcover; a mat of colour on slopes.
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