Frost Dates & Planting Calendar for Hibbing, MN

The average first fall frost in Hibbing, MN is September 8, and the average last spring frost is June 5, giving a growing season of about 93 days.

Plan your garden around Hibbing, MN's typical frost-free growing season, using NOAA climate normals and a 42-crop planting calendar built for this location.

Last Spring Frost

June 5

Safe Jun 25 Typical Jun 5 Risky May 22

First Fall Frost

September 8

Safe Aug 23 Typical Sep 8 Risky Sep 23

Growing Season

93 days

Typical last frost to typical first frost.

USDA Hardiness Zone

Zone 3b

Very cold winters, focus on short-season varieties and cold-hardy perennials.

Data: NOAA station HIBBING CHISHOLM HIBBING AP, MN US, 8.7 km away.

— days until the typical last spring frost

How Hibbing Compares

Hibbing's typical last spring frost (Jun 5) comes later than in 99% of the 104 Minnesota cities we track.
Its 93-day growing season is 68 days shorter than the Minnesota median of 161 days.
Compared with Duluth (95 km away), Hibbing's last spring frost comes 22 days later than Duluth's, and its first fall frost arrives 34 days earlier.
July is the warmest month (average high 77°F) and January the coldest (average low -4°F).

Monthly Temperatures

Avg. high Avg. temp Avg. low

Planting Calendar

Vegetables
Crop	Start indoors	Direct sow	Transplant	Fall planting	Maturity	Notes
Tomato	Apr 10 – Apr 24	—	Jun 12 – Jun 19	—	60–85 days	Start indoors 6-8 weeks before last frost; transplant out 1-2 weeks after last frost once soil has warmed.
Pepper	Mar 27 – Apr 10	—	Jun 12 – Jun 26	—	60–90 days	Slow to germinate; start indoors 8-10 weeks before last frost. Transplant only once nights stay above 55F, 1-3 weeks after last frost.
Eggplant	Mar 27 – Apr 10	—	Jun 19 – Jun 26	—	65–85 days	Warm-season crop, similar timing to pepper; needs consistently warm soil (65F+) to transplant.
Cucumber	May 8 – May 15	Jun 12 – Jun 19	Jun 12 – Jun 19	—	50–65 days	Can be started indoors 3-4 weeks before transplanting, or direct-sown 1-2 weeks after last frost once soil is warm.
Zucchini	May 15 – May 22	Jun 12 – Jun 26	Jun 12 – Jun 19	—	45–55 days	Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.
Winter Squash	May 8 – May 15	Jun 12 – Jun 26	Jun 12 – Jun 19	—	80–110 days	Long season; direct sow after soil warms, or start indoors 3-4 weeks before last frost in short-season climates.
Pumpkin	—	Jun 12 – Jun 26	—	—	90–120 days	Direct sow 1-3 weeks after last frost; back-time from your first fall frost so the 90-120 day maturity window lands before it.
Watermelon	May 8 – May 15	—	Jun 19 – Jun 26	—	70–90 days	Needs warm soil (65F+); start indoors 3-4 weeks before last frost, transplant 2-3 weeks after last frost.
Cantaloupe	May 8 – May 15	—	Jun 19 – Jun 26	—	70–90 days	Same warm-soil requirements as watermelon; avoid disturbing roots when transplanting.
Corn	—	Jun 5 – Jun 19	—	—	60–100 days	Direct sow at last frost to 2 weeks after, once soil reaches 60F; does not transplant well. Succession sow every 2 weeks.
Green Bean	—	Jun 5 – Jun 19	—	—	50–65 days	Direct sow at last frost to 2 weeks after, once soil has warmed; frost-tender, do not rush.
Pea	—	Apr 24 – May 8	—	—	55–70 days	Cold-hardy; direct sow 4-6 weeks before last frost as soon as soil can be worked.
Lettuce	—	May 8 – May 22	—	Jul 14 – Jul 28	45–60 days	Cold-hardy; direct sow 2-4 weeks before last frost. Also transplantable from indoor starts.
Spinach	—	Apr 24 – May 8	—	Jul 14 – Jul 28	40–50 days	Very cold-hardy; direct sow 4-6 weeks before last frost as soon as soil can be worked.
Kale	—	May 8 – May 22	—	Jun 30 – Jul 14	50–65 days	Cold-hardy; direct sow 2-4 weeks before last frost or start indoors for earlier transplants.
Arugula	—	May 8 – May 22	—	Jul 28 – Aug 4	30–40 days	Fast-growing, cold-tolerant green; direct sow 2-4 weeks before last frost, succession sow every 2-3 weeks.
Swiss Chard	—	May 15 – May 29	—	—	50–60 days	Fairly cold-hardy; direct sow 1-3 weeks before last frost. Tolerates light frost in fall too.
Broccoli	Apr 17 – May 1	—	May 15 – May 22	Jul 7 – Jul 14	55–80 days	Start indoors 5-7 weeks before last frost; transplant out 2-3 weeks before last frost (hardens off to light frost).
Cauliflower	Apr 17 – May 1	—	May 22 – May 29	Jun 30 – Jul 7	55–85 days	Fussier than broccoli about temperature swings; start indoors 5-7 weeks before last frost, transplant 1-2 weeks before last frost.
Cabbage	Apr 17 – May 1	—	May 8 – May 22	Jun 30 – Jul 14	60–100 days	Cold-hardy; start indoors 5-7 weeks before last frost, transplant 2-4 weeks before last frost.
Brussels Sprouts	Apr 17 – May 1	—	May 15 – May 29	—	90–110 days	Long-season crop best timed to mature after a light fall frost for sweetest flavor; start indoors 5-7 weeks before last frost.
Carrot	—	May 8 – May 22	—	Jun 16 – Jun 30	60–80 days	Direct sow only (does not transplant); sow 2-4 weeks before last frost, as soon as soil can be worked.
Beet	—	May 8 – May 22	—	Jun 30 – Jul 14	50–65 days	Direct sow 2-4 weeks before last frost; tolerates light frost.
Radish	—	May 1 – May 15	—	Jul 28 – Aug 11	22–30 days	Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.
Turnip	—	May 8 – May 22	—	Jun 30 – Jul 14	40–60 days	Cold-hardy; direct sow 2-4 weeks before last frost.
Onion	Mar 27 – Apr 10	—	May 8 – May 22	—	90–120 days	Start seeds indoors 8-10 weeks before last frost (or use sets/transplants); set out 2-4 weeks before last frost, very cold-tolerant as seedlings.
Garlic	—	—	—	Aug 11 – Aug 25	240–270 days	Fall-planted crop only; not planted in spring in most climates.
Potato	—	May 8 – May 22	—	—	70–120 days	Plant seed potatoes 2-4 weeks before last frost, as soon as soil can be worked and is above 45F; light frost on emerging foliage is usually tolerated.
Sweet Potato	—	—	Jun 19 – Jul 3	—	90–120 days	Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.
Asparagus	—	—	May 8 – May 22	—	730–1095 days	Perennial; plant crowns 2-4 weeks before last frost as soon as soil can be worked. Takes 2-3 years to full production.

Herbs
Crop	Start indoors	Direct sow	Transplant	Fall planting	Maturity	Notes
Basil	Apr 24 – May 1	—	Jun 12 – Jun 19	—	50–70 days	Very frost/cold sensitive; start indoors 5-6 weeks before last frost, transplant only after all danger of frost (1-2 weeks after) and nights stay warm.
Cilantro	—	May 15 – May 29	—	Jul 14 – Jul 28	45–70 days	Cool-season, bolts in heat; direct sow 1-3 weeks before last frost, succession sow through spring.
Parsley	Apr 10 – Apr 24	—	May 22 – May 29	—	70–90 days	Slow to germinate; start indoors 6-8 weeks before last frost, transplant 1-2 weeks before last frost (biennial, cold-tolerant).
Dill	—	May 15 – May 29	—	—	40–60 days	Taprooted, does not transplant well; direct sow 1-3 weeks before last frost, succession sow through summer.
Oregano	Apr 10 – Apr 24	—	Jun 5 – Jun 12	—	80–90 days	Perennial herb; start indoors 6-8 weeks before last frost, transplant around/just after last frost date.
Thyme	Apr 10 – Apr 24	—	Jun 5 – Jun 12	—	85–95 days	Perennial herb, slow from seed; start indoors 6-8 weeks before last frost, transplant around/after last frost.

Flowers
Crop	Start indoors	Direct sow	Transplant	Fall planting	Maturity	Notes
Sunflower	—	Jun 12 – Jun 26	—	—	70–100 days	Direct sow 1-3 weeks after last frost once soil has warmed; taprooted, resents transplanting.
Zinnia	May 8 – May 15	Jun 12 – Jun 26	Jun 12 – Jun 19	—	60–70 days	Frost-tender; direct sow 1-3 weeks after last frost, or start indoors 3-4 weeks early for earlier blooms.
Marigold	Apr 24 – May 8	—	Jun 12 – Jun 19	—	45–60 days	Frost-tender; start indoors 4-6 weeks before last frost, transplant after all frost danger has passed.
Cosmos	May 8 – May 15	Jun 12 – Jun 26	Jun 12 – Jun 19	—	60–90 days	Easy from direct seed 1-3 weeks after last frost; can also start indoors 3-4 weeks early.
Nasturtium	—	Jun 12 – Jun 26	—	—	50–65 days	Frost-tender, resents root disturbance; direct sow 1-3 weeks after last frost once soil has warmed.
Dahlia	—	—	Jun 12 – Jun 26	—	90–120 days	Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive.

Date ranges are estimates based on university extension guidelines and this city's NOAA frost normals — not a guarantee. Scroll to see all columns on narrow screens.

Frequently Asked Questions

When is the last frost in Hibbing, MN?

Based on 1991–2020 NOAA climate normals for the HIBBING CHISHOLM HIBBING AP, MN US station, the last spring frost in Hibbing typically falls around June 5. A cautious gardener might wait until June 25 (only a 10% chance of a later frost), while May 22 marks an earlier, higher-risk planting date.

When is the first frost in Hibbing, MN in fall?

The first fall frost in Hibbing typically arrives around September 8. To stay safe, assume frost could start as early as August 23; in milder years it can hold off until September 23.

How long is the growing season in Hibbing, MN?

Hibbing's average frost-free growing season is about 93 days, running from the typical last spring frost (June 5) to the typical first fall frost (September 8).

What USDA hardiness zone is Hibbing, MN in?

Hibbing, MN is in USDA plant hardiness zone 3b, per the USDA's 2023 Plant Hardiness Zone Map. Very cold winters, focus on short-season varieties and cold-hardy perennials.