🥦 Can I Plant Brussels Sprouts in St. Paul, MN?

2026 planting guide for Zone 4b · Last frost ~May 10 · Growing season ~146 days

✅ YES — Good temps, but watch for heat — highs near 78°F

Temperature conditions are suitable for Brussels Sprouts. Highs near 78°F are on the warm side — make sure plants have plenty of water. The season is running warmer than normal, which has opened this window earlier than usual.

Planting window: Apr 29 – May 13
Good to go — plant now while conditions are right.
Live result based on current forecast for St. Paul, MN · Updates every 6 hours
USDA Zone
4b
Last Spring Frost
~May 10
First Fall Frost
October 3
Growing Season
~146 days
Ideal Temp for Brussels Sprouts
45–65°F
Frost Risk
✅ Tolerant

Growing Brussels Sprouts 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), brussels sprouts can go out around March — approximately 8 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 12 weeks before the last frost date gives you a significant head start.

Brussels Sprouts thrives between 45°F and 65°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 90–120 days from transplant to first harvest. Long season. Best harvested after first frost — sweetens flavor.

Frequently Asked Questions

When can I plant brussels sprouts in St. Paul, MN?

In St. Paul (last frost around May 10), brussels sprouts can go out around March — approximately 8 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 12 weeks before that — giving you strong transplants ready to go out at the right time.

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 brussels sprouts outside in St. Paul right now?

That depends on the current weather forecast. Brussels Sprouts needs temperatures above 28°F (ideally 45–65°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 brussels sprouts in St. Paul 2026?

Yes — Brussels Sprouts 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 brussels sprouts. As a frost-tolerant crop, brussels sprouts can even go out a few weeks before the last frost date.

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