Verbena in Zone 10a & 10b
Glandularia spp.
Yes, verbena grows in zones 10a and 10b. Plant it outside in Sep–Nov. For a fall crop, plant out in Sep–Nov.
When to plant verbena in zone 10b
Zones 10a and 10b share the same average frost dates, so this page covers both.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Either works.
| Window | Fall window |
|---|---|
| Start indoors | Not typically started indoors |
| Direct sow / transplant outside | Sep–Nov |
| Estimated bloom | ~80 days after planting |
Spacing: about 2 square feet per plant (square-foot-gardening spacing). Mature height: 0.5-1 ft.
Zone 10b dates sourced from growinginthegarden.com.
Fall window: the last sowing date is the average first frost minus days to maturity, the method in Purdue Extension's fall garden guide, which lists verbena for late-summer planting.
Plant alongside it in zone 10b
These go outside within two weeks of verbena in zone 10b, so one planting day can cover them.
- Bachelor's Button (Cornflower)Sep–Nov
- CalendulaSep–Nov
- DelphiniumSep–Nov
- Gaillardia (Blanket Flower)Sep–Nov
- LarkspurSep–Jan
- PetuniaSep–Mar
Verbena is a low, spreading groundcover flower, 6 to 12 inches at most, that does most of its work at ground level, filling gaps between taller plants and covering bare soil with tight, flat-topped clusters of small purple, pink, red, or white flowers through the hot months.
How verbena fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Verbena needs about 80 days from sowing to first bloom.
Verbena planting windows in every zone
Zone 10b is highlighted. Useful for comparing against a neighbouring zone, or for a garden somewhere else.
| Zone | Start indoors | Sow or plant out | Bloom |
|---|---|---|---|
| 5a & 5b | Mar 1–Mar 8 | May 17–May 24 | Aug 5–Aug 12 |
| 6a & 6b | Feb 14–Feb 21 | May 2–May 9 | Jul 21–Jul 28 |
| 7a & 7b | Jan 30–Feb 6 | Apr 17–Apr 24 | Jul 6–Jul 13 |
| 8a & 8b | Jan 14–Jan 21 | Apr 1–Apr 8 | Jun 20–Jun 27 |
| 9a & 9b | Dec 7–Dec 14 | Feb 22–Mar 1 | May 13–May 20 |
| 10a & 10bFall window (your zone) | Not usually | Sep–Nov | ~80 days after planting |
Bloom dates are about 80 days after the sow or plant-out date, not after starting seeds indoors.
Good companions
No well-established companions for verbena.
Where to buy verbena seeds
True Leaf Market (each supplier's verbena seeds)
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See it growing
Search YouTube for "growing verbena" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Verbena in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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