Growing Calendula in Zone 9a
Zone 9a has warm winters and an extended growing season — excellent for heat-loving crops like Calendula. Last frost: Mar 20. First frost: Nov 12.
Planting Calendar
Season: Mar 20 – Nov 12 (237 days)
When to Plant Calendula in Zone 9a
Start Seeds Indoors: Feb 6
Start Calendula seeds indoors around Feb 6 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–14 days.
Transplant Outdoors: Mar 6
Transplant Calendula seedlings outdoors after Mar 6. Wait until soil temperature reaches 45°F. Space plants at 12/sqft. Harden off plants for a week before moving outside.
Harvest: Apr 15
First harvest approximately Apr 15 (~40 days from transplant). Continue harvesting until first frost (Nov 12).
Calendula 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 Calendula in Zone 9a?
Start Calendula seeds indoors around Feb 6. Transplant outdoors after Mar 6. Expect first harvest around Apr 15.
What is the last frost date for Zone 9a?
The average last spring frost date for Zone 9a is Mar 20. The first fall frost averages Nov 12, giving a 237-day growing season.
Can I grow Calendula in Zone 9a?
Yes. Calendula needs 55 days to harvest. Zone 9a has a 237-day growing season, which is sufficient.
What is the best month to plant Calendula in Zone 9a?
The best time to start Calendula in Zone 9a is Feb. Begin seeds indoors around Feb 6, then transplant outdoors after the last frost date of Mar 20.
How long does Calendula take to harvest?
Calendula takes approximately 55 days from planting to harvest. In Zone 9a, expect your first harvest around Apr 15.
Plan Your Calendula Garden
Track Calendula from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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