Growing Mustard Greens in Zone 12a
Zone 12a has a year-round growing season. Mustard Greens can be planted almost any time with proper planning. Last frost: Jan 1. First frost: Dec 31.
Planting Calendar
Season: Jan 1 – Dec 31 (364 days) · Succession: plant every 2 weeks (up to 22x)
When to Plant Mustard Greens in Zone 12a
Start Seeds Indoors: Dec 4
Start Mustard Greens seeds indoors around Dec 4 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–8 days.
Transplant Outdoors: Dec 18
Transplant Mustard Greens seedlings outdoors after Dec 18. Wait until soil temperature reaches 40°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.
Harvest: Feb 1
First harvest approximately Feb 1 (~45 days from planting). Continue harvesting until first frost (Dec 31).
Fall Planting: Nov 19
For a fall harvest, plant Mustard Greens around Nov 19 (6 weeks before first frost).
Mustard 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 Mustard Greens in Zone 12a?
Start Mustard Greens seeds indoors around Dec 4. Transplant outdoors after Dec 18. Expect first harvest around Feb 1.
What is the last frost date for Zone 12a?
The average last spring frost date for Zone 12a is Jan 1. The first fall frost averages Dec 31, giving a 364-day growing season.
Can I grow Mustard Greens in Zone 12a?
Yes. Mustard Greens needs 45 days to harvest. Zone 12a has a 364-day growing season, which is sufficient. You can plant up to 22 successions.
What is the best month to plant Mustard Greens in Zone 12a?
The best time to start Mustard Greens in Zone 12a is Dec. Begin seeds indoors around Dec 4, then transplant outdoors after the last frost date of Jan 1.
How long does Mustard Greens take to harvest?
Mustard Greens takes approximately 45 days from planting to harvest. In Zone 12a, expect your first harvest around Feb 1.
Plan Your Mustard Greens Garden
Track Mustard Greens from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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