🧄 Can I Plant Garlic in St. Paul, MN?

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

⏳ WAIT — Too late to harvest before first frost (~Nov 10)

Garlic needs at least 240 days to harvest, but there are only ~102 days before the average first fall frost around Nov 10. Wait until next spring for best results.

Planting window: Oct 26 – Nov 9 (next spring)
Skip this season. Plan to start garlic again around Oct 26 next spring.
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 Garlic
35–70°F
Frost Risk
✅ Tolerant

Growing Garlic 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), garlic can go out around December — approximately 20 weeks before the last expected frost, making it an early-season opportunity.

Garlic thrives between 35°F and 70°F. It tolerates temperatures as low as 20°F, making it a candidate for early spring planting before the last frost date. Expect 240–270 days from transplant to first harvest. Plant in fall, harvest next summer.

Frequently Asked Questions

When can I plant garlic in St. Paul, MN?

In St. Paul (last frost around May 10), garlic can go out around December — approximately 20 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 garlic outside in St. Paul right now?

That depends on the current weather forecast. Garlic needs temperatures above 20°F (ideally 35–70°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 garlic in St. Paul 2026?

Yes — Garlic 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 garlic. As a frost-tolerant crop, garlic can even go out a few weeks before the last frost date.

Grow Garlic in Other Cities

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