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🌽 Growing Corn in Zone 9b
Zone 9b has warm winters and an extended growing season — excellent for heat-loving crops like Corn. Last frost: Mar 10. First frost: Nov 15.
Planting Calendar
Season: Mar 10 – Nov 15 (250 days) · Succession: plant every 2 weeks (up to 11x)
When to Plant Corn in Zone 9b
Sow Seeds Outdoors: Mar 17
Direct sow Corn seeds outdoors around Mar 17. Soil temperature should be at least 60°F. Space at 4/sqft (6" apart).
Harvest: Jun 10
First harvest approximately Jun 10 (~85 days from planting). Continue harvesting until first frost (Nov 15).
Companion Planting
Corn 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 Corn in Zone 9b?
Direct sow Corn outdoors around Mar 17. Harvest around Jun 10.
What is the last frost date for Zone 9b?
The average last spring frost date for Zone 9b is Mar 10. The first fall frost averages Nov 15, giving a 250-day growing season.
Can I grow Corn in Zone 9b?
Yes. Corn needs 85 days to harvest. Zone 9b has a 250-day growing season, which is sufficient. You can plant up to 11 successions.
What is the best month to plant Corn in Zone 9b?
The best time to plant Corn in Zone 9b is around Mar 17, when soil temperatures are suitable and frost risk has passed.
What companion plants grow well with Corn?
Good companion plants for Corn include Beans, Squash, Cucumbers, Peas, Pumpkins. Avoid planting Corn near Tomatoes.
How long does Corn take to harvest?
Corn takes approximately 85 days from planting to harvest. In Zone 9b, expect your first harvest around Jun 10.
Plan Your Corn Garden
Track Corn from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Corn Growing Guide