Growing Sunflowers in Zone 13
When to plant and harvest sunflowers in Zone 13— based on your zone's frost dates.
Zone 13 runs warmer than sunflowers' usual range (Zones 2–11). Heat can cut the season short, so focus on the cooler shoulder months.
Sunflowers planting calendar for Zone 13
These months are derived from Zone 13'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 13: FAQs
Can you grow sunflowers in Zone 13?＋
Zone 13 runs warmer than sunflowers' usual range (Zones 2–11). Heat can cut the season short, so focus on the cooler shoulder months.
When should I plant sunflowers in Zone 13?＋
In Zone 13, sow outdoors around January. Zone 13'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 13?＋
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 13 overview →
Frost dates, climate, and everything to grow here.
June in Zone 13 →
What to sow, transplant, and harvest this month.