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🌻 Growing Sunflower in Zone 7b
Zone 7b has mild winters and a long growing season — good conditions for Sunflower. Last frost: Apr 10. First frost: Nov 7.
Planting Calendar
Season: Apr 10 – Nov 7 (211 days) · Succession: plant every 2 weeks (up to 8x)
When to Plant Sunflower in Zone 7b
Start Seeds Indoors: Mar 20
Start Sunflower seeds indoors around Mar 20 (3 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.
Transplant Outdoors: Apr 17
Transplant Sunflower seedlings outdoors after Apr 17. Wait until soil temperature reaches 55°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.
Harvest: Jun 21
First harvest approximately Jun 21 (~65 days from transplant). Continue harvesting until first frost (Nov 7).
Companion Planting
Sunflower in Other Zones
1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13bFrequently Asked Questions
When should I plant Sunflower in Zone 7b?
Start Sunflower seeds indoors around Mar 20. Transplant outdoors after Apr 17. Expect first harvest around Jun 21.
What is the last frost date for Zone 7b?
The average last spring frost date for Zone 7b is Apr 10. The first fall frost averages Nov 7, giving a 211-day growing season.
Can I grow Sunflower in Zone 7b?
Yes. Sunflower needs 90 days to harvest. Zone 7b has a 211-day growing season, which is sufficient. You can plant up to 8 successions.
What is the best month to plant Sunflower in Zone 7b?
The best time to start Sunflower in Zone 7b is Mar. Begin seeds indoors around Mar 20, then transplant outdoors after the last frost date of Apr 10.
What companion plants grow well with Sunflower?
Good companion plants for Sunflower include Cucumbers, Squash, Corn, Beans. Avoid planting Sunflower near Potatoes.
How long does Sunflower take to harvest?
Sunflower takes approximately 90 days from planting to harvest. In Zone 7b, expect your first harvest around Jun 21.
Plan Your Sunflower Garden
Track Sunflower from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Sunflower Growing Guide