Growing Mustard Greens in Zone 4a
Zone 4a has cold winters and a moderate growing season. Timing is key for Mustard Greens in this zone. Last frost: May 5. First frost: Oct 1.
Planting Calendar
Season: May 5 – Oct 1 (149 days) · Succession: plant every 2 weeks (up to 7x)
When to Plant Mustard Greens in Zone 4a
Start Seeds Indoors: Apr 7
Start Mustard Greens seeds indoors around Apr 7 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–8 days.
Transplant Outdoors: Apr 21
Transplant Mustard Greens seedlings outdoors after Apr 21. Wait until soil temperature reaches 40°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.
Harvest: Jun 5
First harvest approximately Jun 5 (~45 days from planting). Continue harvesting until first frost (Oct 1).
Fall Planting: Aug 20
For a fall harvest, plant Mustard Greens around Aug 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 4a?
Start Mustard Greens seeds indoors around Apr 7. Transplant outdoors after Apr 21. Expect first harvest around Jun 5.
What is the last frost date for Zone 4a?
The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.
Can I grow Mustard Greens in Zone 4a?
Yes. Mustard Greens needs 45 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 7 successions.
What is the best month to plant Mustard Greens in Zone 4a?
The best time to start Mustard Greens in Zone 4a is Apr. Begin seeds indoors around Apr 7, then transplant outdoors after the last frost date of May 5.
How long does Mustard Greens take to harvest?
Mustard Greens takes approximately 45 days from planting to harvest. In Zone 4a, expect your first harvest around Jun 5.
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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