Growing Cosmos in Zone 11
When to plant and harvest cosmos in Zone 11— based on your zone's frost dates.
Zone 11 sits comfortably within cosmos' best range (Zones 2–11), so it grows well here on a standard schedule.
Cosmos planting calendar for Zone 11
These months are derived from Zone 11's frost dates — last frost around None, first frost around None.
Start indoors
—
Sow outdoors
February
Transplant
—
Harvest
—
Cosmos care at a glance
- Sunlight
- Full sun (6+ hours)
- Water
- Low — drought-tolerant once established
- Spacing
- 12–18 in apart
- Days to maturity
- 50–90 days to first bloom
- Best zones
- 2–11 (warm-season annual)
Growing cosmos in Zone 11: FAQs
Can you grow cosmos in Zone 11?＋
Zone 11 sits comfortably within cosmos' best range (Zones 2–11), so it grows well here on a standard schedule.
When should I plant cosmos in Zone 11?＋
In Zone 11, sow outdoors around February. Zone 11's last spring frost is typically None and its first fall frost around None, which sets the planting window.
When to harvest cosmos in Zone 11?＋
Harvest timing depends on your planting date and variety — cosmos typically matures in 50–90 days to first bloom. See the full guide for harvest cues.
Full Cosmos guide →
Complete care, problems, companions, and harvest tips.
Zone 11 overview →
Frost dates, climate, and everything to grow here.
June in Zone 11 →
What to sow, transplant, and harvest this month.