🥬 Can I Plant Mustard Greens in St. Paul, MN?
Mustard Greens thrives in cool weather and can be planted now for a fall harvest. Sow seeds soon — they'll be ready around Aug 24–Sep 13, well before the average first frost around Nov 10.
Growing Mustard Greens in St. Paul
St. Paul shares Minneapolis's Zone 4b climate on the Mississippi River, with a compressed growing season of approximately 145 days. Despite the short window, the intense summer daylight and warm July temperatures allow impressive vegetable production. Focus on short-season varieties, start seeds indoors in April, and use season extension tools like row covers on both ends of the season to maximize yields.
In St. Paul (last frost around May 10), mustard greens can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity.
Mustard Greens thrives between 40°F and 65°F. It tolerates temperatures as low as 25°F, making it a candidate for early spring planting before the last frost date. Expect 25–45 days from transplant to first harvest. Fast-growing cool-season green. Bolts in heat.
Frequently Asked Questions
When can I plant mustard greens in St. Paul, MN?
In St. Paul (last frost around May 10), mustard greens can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity.
What is the USDA hardiness zone for St. Paul?
St. Paul, MN is in USDA Plant Hardiness Zone 4b. The last expected spring frost is around May 10, and the first fall frost arrives around October 3. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.
Is it safe to plant mustard greens outside in St. Paul right now?
That depends on the current weather forecast. Mustard Greens needs temperatures above 25°F (ideally 40–65°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.
Can I grow mustard greens in St. Paul 2026?
Yes — Mustard Greens grows well in St. Paul, MN. With a Zone 4b climate and a growing season of ~146 days, St. Paul is well-suited for cool-season crops like mustard greens. As a frost-tolerant crop, mustard greens can even go out a few weeks before the last frost date.
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