Growing Sunflowers in Zone 12
When to plant and harvest sunflowers in Zone 12— based on your zone's frost dates.
Zone 12 sits just outside sunflowers' ideal range (Zones 2–11), but a good harvest is achievable with careful timing and a little season extension.
Sunflowers planting calendar for Zone 12
These months are derived from Zone 12's frost dates — last frost around None, first frost around None.
Start indoors
—
Sow outdoors
January
Transplant
—
Harvest
—
Sunflowers care at a glance
- Sunlight
- Full sun (6+ hours)
- Water
- Moderate; deep but infrequent once established
- Spacing
- 6–18 in apart by variety
- Days to maturity
- 70–100 days
- Best zones
- 2–11
Growing sunflowers in Zone 12: FAQs
Can you grow sunflowers in Zone 12?＋
Zone 12 sits just outside sunflowers' ideal range (Zones 2–11), but a good harvest is achievable with careful timing and a little season extension.
When should I plant sunflowers in Zone 12?＋
In Zone 12, sow outdoors around January. Zone 12's last spring frost is typically None and its first fall frost around None, which sets the planting window.
When to harvest sunflowers in Zone 12?＋
Harvest timing depends on your planting date and variety — sunflowers typically matures in 70–100 days. See the full guide for harvest cues.
Full Sunflowers guide →
Complete care, problems, companions, and harvest tips.
Zone 12 overview →
Frost dates, climate, and everything to grow here.
June in Zone 12 →
What to sow, transplant, and harvest this month.