Hibbing, MN planting zone & frost dates
Hibbing is in USDA hardiness zone 3b. The last spring frost usually comes around June 5 and the first fall frost around September 8, for a growing season of about 93 days.
Planting calendar for Hibbing
Dates are counted from the average last spring frost (June 5) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Apr 10 – Apr 24 Transplant outdoors: Jun 12 – Jun 19 |
| Peppers | Start seeds indoors: Mar 27 – Apr 10 Transplant outdoors: Jun 19 – Jun 26 |
| Eggplant | Start seeds indoors: Mar 27 – Apr 10 Transplant outdoors: Jun 19 – Jun 26 |
| Broccoli | Start seeds indoors: Mar 27 – Apr 10 Transplant outdoors: May 8 – May 22 |
| Cabbage | Start seeds indoors: Mar 27 – Apr 10 Transplant outdoors: May 8 – May 22 |
| Onions (sets) | Plant outdoors: May 8 – May 22 |
| Peas | Sow outdoors: Apr 24 – May 8 |
| Spinach | Sow outdoors: Apr 24 – May 8 |
| Lettuce | Sow outdoors: May 8 – May 22 |
| Carrots | Sow outdoors: May 8 – May 22 |
| Potatoes | Plant outdoors: May 8 – May 22 |
| Beans | Sow outdoors: Jun 12 – Jun 19 |
| Sweet corn | Sow outdoors: Jun 12 – Jun 19 |
| Cucumbers | Sow outdoors: Jun 12 – Jun 19 |
| Squash & zucchini | Sow outdoors: Jun 12 – Jun 19 |
| Basil | Start seeds indoors: Apr 24 – May 8 Transplant outdoors: Jun 12 – Jun 19 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Jul 14 (8 weeks before the average first fall frost on Sep 8).
Useful for zone 3b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
- Cold frame / mini greenhouse — adds weeks to a short season
As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | May 22 | Jun 5 | Jun 25 |
| First 32°F frost in fall is before | Sep 23 | Sep 8 | Aug 23 |
How to read it: in spring there is a 10% chance of a frost after June 25, so that is a safe date for tender plants. In fall there is a 10% chance of frost before August 23. A hard freeze (28°F) usually ends around May 23.
Hardiness zone by ZIP code in Hibbing
- 55746 zone 3b
Nearby cities
- Grand Rapids zone 4a, last frost May 17
- Cloquet zone 4a, last frost May 26
- Duluth zone 4b, last frost May 14
- Brainerd zone 4a, last frost May 8
- North Branch zone 4b, last frost May 19
- Bemidji zone 3b, last frost May 17
- East Bethel zone 4b, last frost May 1
- Forest Lake zone 4b, last frost May 3
Questions
What growing zone is Hibbing, MN?
Hibbing is in USDA Plant Hardiness Zone 3b (average extreme winter low -35°F to -30°F), according to the USDA 2023 map.
When is the last frost in Hibbing?
The average last spring frost (32°F) in Hibbing is June 5. There is still a 10% chance of frost until June 25.
When can I plant tomatoes in Hibbing?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Jun 12 – Jun 19. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hibbing Chisholm Hibbing Ap, MN (USW00094931), 8.7 km (5.4 mi) from the city center, elevation 412 m, based on 30 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.