Phlox (Annual) in Zone 8a & 8b
Phlox drummondii
When to plant phlox (annual) in zone 8b
Zones 8a and 8b share the same average frost dates in our data, so this page covers both.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Phlox (Annual) tolerates either.
| Start indoors | Feb 18–Feb 25 |
|---|---|
| Direct sow / transplant outside | Mar 18–Mar 25 |
| Estimated bloom | May 27–Jun 3 (~70 days after planting) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 0.5-1.5 ft.
Annual phlox is a compact, fast, and easy bedding flower in unusually bright, saturated colors, worth telling apart from the taller, perennial garden phlox that shares the common name but grows and behaves quite differently.
How phlox (annual) fits zone 8's season
Zone 8b's frost-free window runs about 230 days, from March 25 to November 10. Phlox (Annual) needs about 70 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Phlox (Annual).
Where to buy phlox seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing phlox (annual)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 8b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Phlox (Annual) in USDA zone 8b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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