Growing Collard Greens in Zone 10a
Zone 10a has a year-round growing season. Collard Greens can be planted almost any time with proper planning. Last frost: Feb 20. First frost: Dec 1.
Planting Calendar
Season: Feb 20 – Dec 1 (284 days)
When to Plant Collard Greens in Zone 10a
Start Seeds Indoors: Jan 9
Start Collard Greens seeds indoors around Jan 9 (6 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–10 days.
Transplant Outdoors: Jan 30
Transplant Collard Greens seedlings outdoors after Jan 30. Wait until soil temperature reaches 45°F. Space plants at 18/sqft. Harden off plants for a week before moving outside.
Harvest: Mar 21
First harvest approximately Mar 21 (~50 days from transplant). Continue harvesting until first frost (Dec 1). Collard Greens can overwinter in mild climates for continued harvest.
Fall Planting: Sep 22
For a fall harvest, plant Collard Greens around Sep 22 (10 weeks before first frost).
Collard Greens 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 Collard Greens in Zone 10a?
Start Collard Greens seeds indoors around Jan 9. Transplant outdoors after Jan 30. Expect first harvest around Mar 21.
What is the last frost date for Zone 10a?
The average last spring frost date for Zone 10a is Feb 20. The first fall frost averages Dec 1, giving a 284-day growing season.
Can I grow Collard Greens in Zone 10a?
Yes. Collard Greens needs 60 days to harvest. Zone 10a has a 284-day growing season, which is sufficient.
What is the best month to plant Collard Greens in Zone 10a?
The best time to start Collard Greens in Zone 10a is Jan. Begin seeds indoors around Jan 9, then transplant outdoors after the last frost date of Feb 20.
How long does Collard Greens take to harvest?
Collard Greens takes approximately 60 days from planting to harvest. In Zone 10a, expect your first harvest around Mar 21.
Plan Your Collard Greens Garden
Track Collard Greens from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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