Growing Mustard Greens in Zone 1b
Zone 1b has harsh winters and a short growing season. Start Mustard Greens early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.
Planting Calendar
Season: May 25 – Aug 28 (95 days) · Succession: plant every 2 weeks (up to 3x)
When to Plant Mustard Greens in Zone 1b
Start Seeds Indoors: Apr 27
Start Mustard Greens seeds indoors around Apr 27 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–8 days.
Transplant Outdoors: May 11
Transplant Mustard Greens seedlings outdoors after May 11. 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 25
First harvest approximately Jun 25 (~45 days from planting). Continue harvesting until first frost (Aug 28).
Fall Planting: Jul 17
For a fall harvest, plant Mustard Greens around Jul 17 (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 1b?
Start Mustard Greens seeds indoors around Apr 27. Transplant outdoors after May 11. Expect first harvest around Jun 25.
What is the last frost date for Zone 1b?
The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.
Can I grow Mustard Greens in Zone 1b?
Yes. Mustard Greens needs 45 days to harvest. Zone 1b has a 95-day growing season, which is sufficient. You can plant up to 3 successions.
What is the best month to plant Mustard Greens in Zone 1b?
The best time to start Mustard Greens in Zone 1b is Apr. Begin seeds indoors around Apr 27, then transplant outdoors after the last frost date of May 25.
How long does Mustard Greens take to harvest?
Mustard Greens takes approximately 45 days from planting to harvest. In Zone 1b, expect your first harvest around Jun 25.
Plan Your Mustard Greens Garden
Track Mustard Greens from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Mustard Greens Growing Guide