Growing Mustard Greens in Zone 10a
Zone 10a has a year-round growing season. Mustard 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) · Succession: plant every 2 weeks (up to 17x)
When to Plant Mustard Greens in Zone 10a
Start Seeds Indoors: Jan 23
Start Mustard Greens seeds indoors around Jan 23 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–8 days.
Transplant Outdoors: Feb 6
Transplant Mustard Greens seedlings outdoors after Feb 6. Wait until soil temperature reaches 40°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.
Harvest: Mar 23
First harvest approximately Mar 23 (~45 days from planting). Continue harvesting until first frost (Dec 1).
Fall Planting: Oct 20
For a fall harvest, plant Mustard Greens around Oct 20 (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 10a?
Start Mustard Greens seeds indoors around Jan 23. Transplant outdoors after Feb 6. Expect first harvest around Mar 23.
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 Mustard Greens in Zone 10a?
Yes. Mustard Greens needs 45 days to harvest. Zone 10a has a 284-day growing season, which is sufficient. You can plant up to 17 successions.
What is the best month to plant Mustard Greens in Zone 10a?
The best time to start Mustard Greens in Zone 10a is Jan. Begin seeds indoors around Jan 23, then transplant outdoors after the last frost date of Feb 20.
How long does Mustard Greens take to harvest?
Mustard Greens takes approximately 45 days from planting to harvest. In Zone 10a, expect your first harvest around Mar 23.
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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