Growing Mustard Greens in Zone 10b
Zone 10b has a year-round growing season. Mustard Greens can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.
Planting Calendar
Season: Jan 28 – Dec 22 (328 days) · Succession: plant every 2 weeks (up to 20x)
When to Plant Mustard Greens in Zone 10b
Start Seeds Indoors: Dec 31
Start Mustard Greens seeds indoors around Dec 31 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–8 days.
Transplant Outdoors: Jan 14
Transplant Mustard Greens seedlings outdoors after Jan 14. 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 28
First harvest approximately Feb 28 (~45 days from planting). Continue harvesting until first frost (Dec 22).
Fall Planting: Nov 10
For a fall harvest, plant Mustard Greens around Nov 10 (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 10b?
Start Mustard Greens seeds indoors around Dec 31. Transplant outdoors after Jan 14. Expect first harvest around Feb 28.
What is the last frost date for Zone 10b?
The average last spring frost date for Zone 10b is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.
Can I grow Mustard Greens in Zone 10b?
Yes. Mustard Greens needs 45 days to harvest. Zone 10b has a 328-day growing season, which is sufficient. You can plant up to 20 successions.
What is the best month to plant Mustard Greens in Zone 10b?
The best time to start Mustard Greens in Zone 10b is Dec. Begin seeds indoors around Dec 31, then transplant outdoors after the last frost date of Jan 28.
How long does Mustard Greens take to harvest?
Mustard Greens takes approximately 45 days from planting to harvest. In Zone 10b, expect your first harvest around Feb 28.
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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