Frost Dates for Coeur D Alene, ID 83815
Last spring frost May 15 · First fall frost September 22 · 130 frost-free days · USDA Zone 6b
ZIP 83815 has about 41,400 people, the largest of 2 ZIP codes in Coeur D Alene.
Moderate season: 130 frost-free days. Spring frost risk spans April 28–May 31 (33 days). Fall frost risk spans September 7–October 8 (31 days).
Frost probability for 83815
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 31 | May 15 | April 28 |
| Fall (first frost) | September 7 | September 22 | October 8 |
Dates come from NOAA 1971–2000 freeze probabilities at SAINT MARIES (48.1 km away); the 50% date is the median year.
Frost dates by ZIP code in Coeur D Alene, ID
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 83815 | May 15 | September 22 | 6b |
| 83814 | May 15 | September 22 | 6b |
Which crops fit a 130-day season in Coeur D Alene
In Coeur D Alene (130 frost-free days, a moderate season), 37 of 56 planner crops fit outright, 16 get two plantings, 2 need an indoor start, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 10 | May 29–Jun 5 | 88 | fits: 80 days to maturity, 88 available after May 29. | — |
| Pepper | Apr 3 | May 29–Jun 5 | 88 | fits: 75 days to maturity, 88 available after May 29. | — |
| Lettuce | Mar 20 | Apr 17–Apr 24 | 165 | two-plantings: Plant Apr 17 and again by Aug 1; both mature before Sep 29. | Aug 1 |
| Carrots | — | Apr 24–May 1 | 172 | fits: 70 days to maturity, 172 available after Apr 24. | Jul 21 |
| Cucumber | Apr 24 | May 29–Jun 5 | 102 | fits: 60 days to maturity, 102 available after May 29. | Jun 26 |
| Beans | — | May 22–Jun 5 | 116 | fits: 60 days to maturity, 116 available after May 22. | Jul 3 |
| Peas | — | Mar 20–May 29 | 193 | fits: 65 days to maturity, 193 available after Mar 20. | Jul 12 |
| Zucchini | May 1 | May 29–Jun 5 | 102 | fits: 55 days to maturity, 102 available after May 29. | Jul 1 |
| Onion | Feb 20 | Apr 17–May 1 | 165 | fits: 100 days to maturity, 165 available after Apr 17. | — |
| Spinach | — | Mar 20–May 8 | 207 | two-plantings: Plant Mar 20 and again by Aug 20; both mature before Oct 13. | Aug 20 |
| Kale | Mar 6 | Apr 17–May 1 | 179 | two-plantings: Plant Apr 17 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Broccoli | Mar 20 | Apr 17–May 1 | 165 | fits: 80 days to maturity, 165 available after Apr 17. | Jun 27 |
| Cabbage | Mar 20 | Apr 17–May 1 | 179 | fits: 70 days to maturity, 179 available after Apr 17. | Jul 21 |
| Radish | — | Mar 20–Jun 12 | 193 | two-plantings: Plant Mar 20 and again by Aug 21; both mature before Sep 29. | Aug 21 |
| Beets | — | Mar 20–Jun 12 | 193 | two-plantings: Plant Mar 20 and again by Jul 22; both mature before Sep 29. | Jul 22 |
| Potatoes | — | May 1–May 8 | 151 | fits: 90 days to maturity, 151 available after May 1. | — |
| Garlic | — | Sep 22 | 235 | overwinter: Plant Sep 22 to Oct 13; harvest the following summer. | Oct 13 |
| Strawberry | — | Apr 10–Jun 5 | 186 | perennial: A perennial: plant Apr 10; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 17 | May 22–May 29 | 102 | fits: 75 days to maturity, 102 available after May 22. | Jun 4 |
| Pumpkin | May 1 | May 29–May 29 | 95 | head-start: Even planted out May 29, the outdoor season is about 5 days short; choose an early variety or grow under cover. | — |
| Cauliflower | Apr 3 | May 8–May 22 | 144 | fits: 75 days to maturity, 144 available after May 8. | Jul 2 |
| Swiss Chard | Mar 20 | May 1–May 1 | 151 | two-plantings: Plant May 1 and again by Jul 22; both mature before Sep 29. | Jul 22 |
| Arugula | — | Mar 20–Jun 12 | 207 | two-plantings: Plant Mar 20 and again by Aug 20; both mature before Oct 13. | Aug 20 |
| Brussel Sprouts | Mar 20 | Apr 17–May 1 | 179 | fits: 100 days to maturity, 179 available after Apr 17. | Jun 21 |
| Butternut Squash | May 1 | May 29–Jun 5 | 95 | head-start: Even planted out May 29, the outdoor season is about 5 days short; choose an early variety or grow under cover. | — |
| Eggplant | Mar 27 | May 29–Jun 5 | 88 | fits: 70 days to maturity, 88 available after May 29. | Jun 2 |
| Okra | Apr 17 | May 22–May 29 | 109 | fits: 55 days to maturity, 109 available after May 22. | Jul 1 |
| Basil | Apr 10 | Jun 5–Jun 5 | 95 | fits: 60 days to maturity, 95 available after Jun 5. | Jun 26 |
| Cilantro | — | Apr 17–May 8 | 165 | two-plantings: Plant Apr 17 and again by Jul 27; both mature before Sep 29. | Jul 27 |
| Parsley | Mar 6 | May 22–May 29 | 130 | fits: 70 days to maturity, 130 available after May 22. | Jul 7 |
| Celery | Mar 6 | May 22–Jun 5 | 130 | fits: 120 days to maturity, 130 available after May 22. | — |
| Scallions | Mar 6 | Apr 17–May 1 | 179 | two-plantings: Plant Apr 17 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Turnip | — | Apr 17–May 1 | 179 | two-plantings: Plant Apr 17 and again by Aug 10; both mature before Oct 13. | Aug 10 |
| Kohlrabi | — | Apr 3–Apr 17 | 193 | two-plantings: Plant Apr 3 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Bok Choy | Apr 17 | May 8–May 15 | 144 | two-plantings: Plant May 8 and again by Aug 1; both mature before Sep 29. | Aug 1 |
| Collards | Mar 6 | Apr 17–May 1 | 179 | two-plantings: Plant Apr 17 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Cantaloupe | May 1 | May 29–Jun 5 | 88 | fits: 85 days to maturity, 88 available after May 29. | — |
| Chives | Feb 20 | May 22–May 29 | 144 | fits: 90 days to maturity, 144 available after May 22. | — |
| Dill | — | Mar 20–Jun 12 | 193 | two-plantings: Plant Mar 20 and again by Jul 22; both mature before Sep 29. | Jul 22 |
| Oregano | Mar 6 | May 22–May 29 | 144 | fits: 80 days to maturity, 144 available after May 22. | — |
| Rosemary | Feb 20 | May 22–May 29 | 130 | fits: 80 days to maturity, 130 available after May 22. | — |
| Sage | Mar 20 | May 22–May 29 | 144 | fits: 75 days to maturity, 144 available after May 22. | — |
| Thyme | Mar 6 | May 22–May 29 | 144 | fits: 90 days to maturity, 144 available after May 22. | — |
| Calendula | Apr 3 | May 1–May 15 | 151 | two-plantings: Plant May 1 and again by Jul 27; both mature before Sep 29. | Jul 27 |
| Cosmos | Apr 17 | May 15–May 29 | 116 | fits: 60 days to maturity, 116 available after May 15. | Jun 26 |
| Lavender | Feb 20 | May 15–May 29 | 151 | fits: 90 days to maturity, 151 available after May 15. | — |
| Marigolds | Apr 3 | May 15–May 22 | 116 | two-plantings: Plant May 15 and again by Jul 6; both mature before Sep 8. | Jul 6 |
| Melons | May 1 | May 29–Jun 5 | 88 | fits: 85 days to maturity, 88 available after May 29. | — |
| Mint | — | May 15–May 29 | 151 | fits: 90 days to maturity, 151 available after May 15. | — |
| Nasturtiums | Apr 17 | May 15–May 22 | 116 | fits: 55 days to maturity, 116 available after May 15. | Jul 1 |
| Pole Beans | — | May 22–Jun 5 | 109 | fits: 65 days to maturity, 109 available after May 22. | Jun 21 |
| Spaghetti Squash | May 1 | May 29–Jun 5 | 95 | fits: 90 days to maturity, 95 available after May 29. | — |
| Sunflowers | — | May 15–May 29 | 116 | fits: 70 days to maturity, 116 available after May 15. | Jun 16 |
| Tomatillos | Mar 20 | May 22–May 29 | 95 | fits: 75 days to maturity, 95 available after May 22. | May 28 |
| Watermelon | May 1 | May 22–May 29 | 95 | fits: 80 days to maturity, 95 available after May 22. | May 23 |
| Yellow Squash | May 1 | May 29–Jun 5 | 102 | fits: 55 days to maturity, 102 available after May 29. | Jul 1 |
| Zinnias | Apr 17 | May 15–May 29 | 116 | fits: 60 days to maturity, 116 available after May 15. | Jun 26 |
Month by month in Coeur D Alene
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 20), Lavender (Feb 20), Onion (Feb 20), Rosemary (Feb 20). |
| March | Start indoors: Celery (Mar 6), Collards (Mar 6), Kale (Mar 6), Oregano (Mar 6), Parsley (Mar 6), Scallions (Mar 6), +9 more. Direct sow from: Arugula (Mar 20), Beets (Mar 20), Dill (Mar 20), Peas (Mar 20), Radish (Mar 20), Spinach (Mar 20). |
| April | Start indoors: Calendula (Apr 3), Cauliflower (Apr 3), Marigolds (Apr 3), Pepper (Apr 3), Basil (Apr 10), Tomato (Apr 10), +7 more. Direct sow from: Kohlrabi (Apr 3), Cilantro (Apr 17), Turnip (Apr 17), Carrots (Apr 24). Transplant from: Broccoli (Apr 17), Brussel Sprouts (Apr 17), Cabbage (Apr 17), Collards (Apr 17), Kale (Apr 17), Lettuce (Apr 17), +2 more. Plant: Strawberry (Apr 10). |
| May | Start indoors: Butternut Squash (May 1), Cantaloupe (May 1), Melons (May 1), Pumpkin (May 1), Spaghetti Squash (May 1), Watermelon (May 1), +2 more. Direct sow from: Potatoes (May 1), Sunflowers (May 15), Beans (May 22), Pole Beans (May 22). Transplant from: Calendula (May 1), Swiss Chard (May 1), Bok Choy (May 8), Cauliflower (May 8), Cosmos (May 15), Lavender (May 15), +26 more. Last frost around May 15. Last sowing dates: Watermelon (May 23), Tomatillos (May 28). |
| June | Transplant from: Basil (Jun 5). Last sowing dates: Eggplant (Jun 2), Corn (Jun 4), Sunflowers (Jun 16), Brussel Sprouts (Jun 21), Pole Beans (Jun 21), Basil (Jun 26), +4 more. |
| July | Last sowing dates: Nasturtiums (Jul 1), Okra (Jul 1), Yellow Squash (Jul 1), Zucchini (Jul 1), Cauliflower (Jul 2), Beans (Jul 3), +12 more. |
| August | Last sowing dates: Bok Choy (Aug 1), Lettuce (Aug 1), Kale (Aug 5), Kohlrabi (Aug 5), Turnip (Aug 10), Arugula (Aug 20), +2 more. |
| September | Direct sow from: Garlic (Sep 22). First frost around September 22. |
| October | Last sowing dates: Garlic (Oct 13). |
| 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 Coeur D Alene, ID (ZIP 83815)?
The median last spring frost date for Coeur D Alene, ID (ZIP code 83815) is around May 15. 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 28; one in ten it runs past May 31.
What is the first fall frost date in Coeur D Alene, ID?
The median first fall frost date for Coeur D Alene, ID is around September 22. 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 7 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Coeur D Alene, ID?
The frost-free growing season in Coeur D Alene is about 130 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 Coeur D Alene (130 frost-free days, a moderate season), 37 of 56 planner crops fit outright, 16 get two plantings, 2 need an indoor start, 1 crop is perennial.
What USDA hardiness zone is Coeur D Alene, ID?
Coeur D Alene, ID is in USDA hardiness zone 6b (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 Coeur D Alene, ID?
Start tomatoes indoors Apr 10 and plant out May 29 in Coeur D Alene. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Coeur D Alene?
Two: plant Apr 17 and again by Aug 1; both mature before Sep 29.
When do I plant garlic in Coeur D Alene?
Sep 22 to Oct 13; it overwinters and is ready the following summer.
Can I grow Butternut Squash in Coeur D Alene?
Yes, with help. Even planted out May 29, the outdoor season is about 5 days short; choose an early variety or grow under cover.
Which nearby ZIP has a longer season?
Liberty Lake (ZIP 99019) has 150 frost-free days, 20 more than Coeur D Alene (ZIP 83815). See Liberty Lake ZIP 99019 frost dates
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