Growing Sunflowers in Zone 9
When to plant and harvest sunflowers in Zone 9— based on your zone's frost dates.
Zone 9 sits comfortably within sunflowers' best range (Zones 2–11), so it grows well here on a standard schedule.
Sunflowers planting calendar for Zone 9
These months are derived from Zone 9's frost dates — last frost around Late January – late February, first frost around Early December – early January.
Start indoors
—
Sow outdoors
—
Transplant
April
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 9: FAQs
Can you grow sunflowers in Zone 9?＋
Zone 9 sits comfortably within sunflowers' best range (Zones 2–11), so it grows well here on a standard schedule.
When should I plant sunflowers in Zone 9?＋
Sunflowers isn't a typical field crop for Zone 9's calendar. Time any planting around the zone's last frost (Late January – late February) and first frost (Early December – early January), and see the full Sunflowers guide for details.
When to harvest sunflowers in Zone 9?＋
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 9 overview →
Frost dates, climate, and everything to grow here.
June in Zone 9 →
What to sow, transplant, and harvest this month.