Frost Dates for Dickinson, ND 58601
Last spring frost May 16 · First fall frost September 19 · 126 frost-free days · USDA Zone 4b
ZIP 58601 has about 29,900 people.
Moderate season: 126 frost-free days. Spring frost risk spans April 30–May 31 (31 days). Fall frost risk spans September 8–September 30 (22 days).
Frost probability for 58601
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 31 | May 16 | April 30 |
| Fall (first frost) | September 8 | September 19 | September 30 |
Dates come from NOAA 1971–2000 freeze probabilities at NEW ENGLAND (41.2 km away); the 50% date is the median year.
Which crops fit a 126-day season in Dickinson
In Dickinson (126 frost-free days, a moderate season), 36 of 56 planner crops fit outright, 15 get two plantings, 4 need an indoor start, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 11 | May 30–Jun 6 | 84 | fits: 80 days to maturity, 84 available after May 30. | — |
| Pepper | Apr 4 | May 30–Jun 6 | 84 | fits: 75 days to maturity, 84 available after May 30. | — |
| Lettuce | Mar 21 | Apr 18–Apr 25 | 161 | two-plantings: Plant Apr 18 and again by Jul 29; both mature before Sep 26. | Jul 29 |
| Carrots | — | Apr 25–May 2 | 168 | fits: 70 days to maturity, 168 available after Apr 25. | Jul 18 |
| Cucumber | Apr 25 | May 30–Jun 6 | 98 | fits: 60 days to maturity, 98 available after May 30. | Jun 23 |
| Beans | — | May 23–Jun 6 | 112 | fits: 60 days to maturity, 112 available after May 23. | Jun 30 |
| Peas | — | Mar 21–May 30 | 189 | fits: 65 days to maturity, 189 available after Mar 21. | Jul 9 |
| Zucchini | May 2 | May 30–Jun 6 | 98 | fits: 55 days to maturity, 98 available after May 30. | Jun 28 |
| Onion | Feb 21 | Apr 18–May 2 | 161 | fits: 100 days to maturity, 161 available after Apr 18. | — |
| Spinach | — | Mar 21–May 9 | 203 | two-plantings: Plant Mar 21 and again by Aug 17; both mature before Oct 10. | Aug 17 |
| Kale | Mar 7 | Apr 18–May 2 | 175 | two-plantings: Plant Apr 18 and again by Aug 2; both mature before Oct 10. | Aug 2 |
| Broccoli | Mar 21 | Apr 18–May 2 | 161 | fits: 80 days to maturity, 161 available after Apr 18. | Jun 24 |
| Cabbage | Mar 21 | Apr 18–May 2 | 175 | fits: 70 days to maturity, 175 available after Apr 18. | Jul 18 |
| Radish | — | Mar 21–Jun 13 | 189 | two-plantings: Plant Mar 21 and again by Aug 18; both mature before Sep 26. | Aug 18 |
| Beets | — | Mar 21–Jun 13 | 189 | two-plantings: Plant Mar 21 and again by Jul 19; both mature before Sep 26. | Jul 19 |
| Potatoes | — | May 2–May 9 | 147 | fits: 90 days to maturity, 147 available after May 2. | — |
| Garlic | — | Sep 19 | 231 | overwinter: Plant Sep 19 to Oct 10; harvest the following summer. | Oct 10 |
| Strawberry | — | Apr 11–Jun 6 | 182 | perennial: A perennial: plant Apr 11; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 18 | May 23–May 30 | 98 | fits: 75 days to maturity, 98 available after May 23. | Jun 1 |
| Pumpkin | May 2 | May 30–May 30 | 91 | head-start: Even planted out May 30, the outdoor season is about 9 days short; choose an early variety or grow under cover. | — |
| Cauliflower | Apr 4 | May 9–May 23 | 140 | fits: 75 days to maturity, 140 available after May 9. | Jun 29 |
| Swiss Chard | Mar 21 | May 2–May 2 | 147 | two-plantings: Plant May 2 and again by Jul 19; both mature before Sep 26. | Jul 19 |
| Arugula | — | Mar 21–Jun 13 | 203 | two-plantings: Plant Mar 21 and again by Aug 17; both mature before Oct 10. | Aug 17 |
| Brussel Sprouts | Mar 21 | Apr 18–May 2 | 175 | fits: 100 days to maturity, 175 available after Apr 18. | Jun 18 |
| Butternut Squash | May 2 | May 30–Jun 6 | 91 | head-start: Even planted out May 30, the outdoor season is about 9 days short; choose an early variety or grow under cover. | — |
| Eggplant | Mar 28 | May 30–Jun 6 | 84 | fits: 70 days to maturity, 84 available after May 30. | — |
| Okra | Apr 18 | May 23–May 30 | 105 | fits: 55 days to maturity, 105 available after May 23. | Jun 28 |
| Basil | Apr 11 | Jun 6–Jun 6 | 91 | fits: 60 days to maturity, 91 available after Jun 6. | Jun 23 |
| Cilantro | — | Apr 18–May 9 | 161 | two-plantings: Plant Apr 18 and again by Jul 24; both mature before Sep 26. | Jul 24 |
| Parsley | Mar 7 | May 23–May 30 | 126 | fits: 70 days to maturity, 126 available after May 23. | Jul 4 |
| Celery | Mar 7 | May 23–Jun 6 | 126 | fits: 120 days to maturity, 126 available after May 23. | — |
| Scallions | Mar 7 | Apr 18–May 2 | 175 | two-plantings: Plant Apr 18 and again by Jul 28; both mature before Oct 10. | Jul 28 |
| Turnip | — | Apr 18–May 2 | 175 | two-plantings: Plant Apr 18 and again by Aug 7; both mature before Oct 10. | Aug 7 |
| Kohlrabi | — | Apr 4–Apr 18 | 189 | two-plantings: Plant Apr 4 and again by Aug 2; both mature before Oct 10. | Aug 2 |
| Bok Choy | Apr 18 | May 9–May 16 | 140 | two-plantings: Plant May 9 and again by Jul 29; both mature before Sep 26. | Jul 29 |
| Collards | Mar 7 | Apr 18–May 2 | 175 | two-plantings: Plant Apr 18 and again by Jul 28; both mature before Oct 10. | Jul 28 |
| Cantaloupe | May 2 | May 30–Jun 6 | 84 | head-start: Even planted out May 30, the outdoor season is about 1 days short; choose an early variety or grow under cover. | — |
| Chives | Feb 21 | May 23–May 30 | 140 | fits: 90 days to maturity, 140 available after May 23. | — |
| Dill | — | Mar 21–Jun 13 | 189 | two-plantings: Plant Mar 21 and again by Jul 19; both mature before Sep 26. | Jul 19 |
| Oregano | Mar 7 | May 23–May 30 | 140 | fits: 80 days to maturity, 140 available after May 23. | — |
| Rosemary | Feb 21 | May 23–May 30 | 126 | fits: 80 days to maturity, 126 available after May 23. | — |
| Sage | Mar 21 | May 23–May 30 | 140 | fits: 75 days to maturity, 140 available after May 23. | — |
| Thyme | Mar 7 | May 23–May 30 | 140 | fits: 90 days to maturity, 140 available after May 23. | — |
| Calendula | Apr 4 | May 2–May 16 | 147 | two-plantings: Plant May 2 and again by Jul 24; both mature before Sep 26. | Jul 24 |
| Cosmos | Apr 18 | May 16–May 30 | 112 | fits: 60 days to maturity, 112 available after May 16. | Jun 23 |
| Lavender | Feb 21 | May 16–May 30 | 147 | fits: 90 days to maturity, 147 available after May 16. | — |
| Marigolds | Apr 4 | May 16–May 23 | 112 | fits: 50 days to maturity, 112 available after May 16. | Jul 3 |
| Melons | May 2 | May 30–Jun 6 | 84 | head-start: Even planted out May 30, the outdoor season is about 1 days short; choose an early variety or grow under cover. | — |
| Mint | — | May 16–May 30 | 147 | fits: 90 days to maturity, 147 available after May 16. | — |
| Nasturtiums | Apr 18 | May 16–May 23 | 112 | fits: 55 days to maturity, 112 available after May 16. | Jun 28 |
| Pole Beans | — | May 23–Jun 6 | 105 | fits: 65 days to maturity, 105 available after May 23. | Jun 18 |
| Spaghetti Squash | May 2 | May 30–Jun 6 | 91 | fits: 90 days to maturity, 91 available after May 30. | — |
| Sunflowers | — | May 16–May 30 | 112 | fits: 70 days to maturity, 112 available after May 16. | Jun 13 |
| Tomatillos | Mar 21 | May 23–May 30 | 91 | fits: 75 days to maturity, 91 available after May 23. | May 25 |
| Watermelon | May 2 | May 23–May 30 | 91 | fits: 80 days to maturity, 91 available after May 23. | — |
| Yellow Squash | May 2 | May 30–Jun 6 | 98 | fits: 55 days to maturity, 98 available after May 30. | Jun 28 |
| Zinnias | Apr 18 | May 16–May 30 | 112 | fits: 60 days to maturity, 112 available after May 16. | Jun 23 |
Month by month in Dickinson
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 21), Lavender (Feb 21), Onion (Feb 21), Rosemary (Feb 21). |
| March | Start indoors: Celery (Mar 7), Collards (Mar 7), Kale (Mar 7), Oregano (Mar 7), Parsley (Mar 7), Scallions (Mar 7), +9 more. Direct sow from: Arugula (Mar 21), Beets (Mar 21), Dill (Mar 21), Peas (Mar 21), Radish (Mar 21), Spinach (Mar 21). |
| April | Start indoors: Calendula (Apr 4), Cauliflower (Apr 4), Marigolds (Apr 4), Pepper (Apr 4), Basil (Apr 11), Tomato (Apr 11), +7 more. Direct sow from: Kohlrabi (Apr 4), Cilantro (Apr 18), Turnip (Apr 18), Carrots (Apr 25). Transplant from: Broccoli (Apr 18), Brussel Sprouts (Apr 18), Cabbage (Apr 18), Collards (Apr 18), Kale (Apr 18), Lettuce (Apr 18), +2 more. Plant: Strawberry (Apr 11). |
| May | Start indoors: Butternut Squash (May 2), Cantaloupe (May 2), Melons (May 2), Pumpkin (May 2), Spaghetti Squash (May 2), Watermelon (May 2), +2 more. Direct sow from: Potatoes (May 2), Sunflowers (May 16), Beans (May 23), Pole Beans (May 23). Transplant from: Calendula (May 2), Swiss Chard (May 2), Bok Choy (May 9), Cauliflower (May 9), Cosmos (May 16), Lavender (May 16), +26 more. Last frost around May 16. Last sowing dates: Tomatillos (May 25). |
| June | Transplant from: Basil (Jun 6). Last sowing dates: Corn (Jun 1), Sunflowers (Jun 13), Brussel Sprouts (Jun 18), Pole Beans (Jun 18), Basil (Jun 23), Cosmos (Jun 23), +9 more. |
| July | Last sowing dates: Marigolds (Jul 3), Parsley (Jul 4), Peas (Jul 9), Cabbage (Jul 18), Carrots (Jul 18), Beets (Jul 19), +8 more. |
| August | Last sowing dates: Kale (Aug 2), Kohlrabi (Aug 2), Turnip (Aug 7), Arugula (Aug 17), Spinach (Aug 17), Radish (Aug 18). |
| September | Direct sow from: Garlic (Sep 19). First frost around September 19. |
| October | Last sowing dates: Garlic (Oct 10). |
| November | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Dickinson, ND (ZIP 58601)?
The median last spring frost date for Dickinson, ND (ZIP code 58601) is around May 16. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before April 30; one in ten it runs past May 31.
What is the first fall frost date in Dickinson, ND?
The median first fall frost date for Dickinson, ND is around September 19. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around September 8 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Dickinson, ND?
The frost-free growing season in Dickinson is about 126 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Dickinson (126 frost-free days, a moderate season), 36 of 56 planner crops fit outright, 15 get two plantings, 4 need an indoor start, 1 crop is perennial.
What USDA hardiness zone is Dickinson, ND?
Dickinson, ND is in USDA hardiness zone 4b (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Dickinson, ND?
Start tomatoes indoors Apr 11 and plant out May 30 in Dickinson. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Dickinson?
Two: plant Apr 18 and again by Jul 29; both mature before Sep 26.
When do I plant garlic in Dickinson?
Sep 19 to Oct 10; it overwinters and is ready the following summer.
Can I grow Butternut Squash in Dickinson?
Yes, with help. Even planted out May 30, the outdoor season is about 9 days short; choose an early variety or grow under cover.
Which nearby ZIP has a longer season?
Bismarck (ZIP 58503) has 133 frost-free days, 7 more than Dickinson (ZIP 58601). See Bismarck ZIP 58503 frost dates
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