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
April
Free planting calendar
Put sunflowers on your own planting calendar
A month-by-month Zone 12 chart with sunflowers already on it — add the rest of your garden, then print it or save it as a PDF.
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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?＋
Expect to harvest sunflowers in Zone 12 around April, depending on the season and variety.
Full Sunflowers guide →
Complete care, problems, companions, and harvest tips.
Zone 12 overview →
Frost dates, climate, and everything to grow here.
October in Zone 12 →
What to sow, transplant, and harvest this month.