Coeur d'Alene, Idaho planting calendar and frost dates
Coeur d'Alene is in USDA hardiness zone 6b. The last spring frost typically comes around April 22 and the first fall frost around October 18, giving about 179 frost-free days a year.
- Hardiness zone
- Zone 6b
- Typical last frost
- April 22
- Typical first frost
- October 18
- Frost-free season
- 179 days
Frost dates in Coeur d'Alene
Last spring frost
- April 4Risky: frost later than this in 9 years out of 10
- April 22Typical: a later frost in half of years
- May 6Safe: a later frost only 1 year in 10
First fall frost
- October 4Risky: frost earlier than this 1 year in 10
- October 18Typical: an earlier frost in half of years
- November 5Late: frost before this in 9 years out of 10
The growing season between the typical last and first frosts is about 179 days. Frost here means a low of 32°F at the weather station. A hard freeze (28°F), which damages most hardy crops too, typically ends around April 1 and returns around November 1.
NOAA U.S. Climate Normals 1991-2020 for Coeur D'Alene, 3.1 miles S of the city center. Low-lying and rural spots often frost later in spring and earlier in fall than airports and city centers.
What to plant each month in Coeur d'Alene
January
Start indoors: collard greens, leeks, onions, petunias, ranunculus
February
Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, chives, collard greens, kale, leeks, lettuce, marigolds, onions, oregano, parsley, petunias, ranunculus, rosemary, sage, snapdragons
March
Start indoors: black-eyed susans, cabbages, cauliflower, chives, cilantro, collard greens, ginger, lettuce, marigolds, nasturtiums, peppers, ranunculus, sage, snapdragons, spinach, swiss chard
Plant or sow outdoors: beets, black-eyed susans, blackberries, blueberries, broccoli, cauliflower, chives, cilantro, collard greens, figs, garlic, gladioli, grapes, grass seed, hollyhocks, kale, leeks, onions, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, spinach, strawberries, swiss chard, turnips, wildflowers
April
Start indoors: basil, celery, eggplants, peppers, ranunculus, tomatoes
Plant or sow outdoors: asparagus, beets, black-eyed susans, blackberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, dahlias, dill, figs, garden mums, gladioli, grapes, green onions, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, onions, oregano, parsley, petunias, potatoes, radishes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, swiss chard, thyme, turnips
May
Start indoors: basil, cantaloupes, cosmos, cucumbers, okra, pumpkins, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, garden mums, ginger, grapes, green onions, kentucky bluegrass, lavenders, lilies, marigolds, mints, nasturtiums, oregano, parsley, perennial ryegrass, petunias, potatoes, rosemary, sage, st. augustinegrass, sunflowers, sweet corn, sweet peas, tall fescue, thyme
June
Start indoors: cosmos, okra, zinnias
Plant or sow outdoors: asparagus, basil, bermudagrass, cantaloupes, celery, centipedegrass, cosmos, cucumbers, eggplants, green beans, green onions, okra, peanuts, peppers, pumpkins, st. augustinegrass, sweet potatoes, tomatoes, watermelons, winter squash, zoysiagrass, zucchini
July
Plant or sow outdoors: bermudagrass, celery, centipedegrass, cosmos, green onions, okra, peanuts, st. augustinegrass, sweet potatoes, zinnias, zoysiagrass
Plant for fall: bearded irises, brussels sprouts, carrots, collard greens, lettuce, peas, snapdragons, swiss chard
August
Plant or sow outdoors: bermudagrass, centipedegrass, zoysiagrass
Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, carrots, cauliflower, clematis, collard greens, coneflowers, daylilies, hostas, hydrangeas, kale, lettuce, peas, radishes, roses, saffron, snapdragons, spinach, swiss chard, turnips
September
Plant for fall: azaleas, bearded irises, cabbages, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, hydrangeas, kale, lilies, ornamental alliums, peonies, radishes, roses, saffron, spinach, tulips
October
Plant for fall: crocuses, daffodils, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips
November
Plant for fall: crocuses, garlic, hyacinths, ornamental alliums, tulips
December
Start indoors: onions
Frost dates and zones by ZIP code in Coeur d'Alene
All 2 of Coeur d'Alene's main ZIP codes take their frost dates from Coeur D'Alene, so the dates on this page apply across the city. Every one of them is in zone 6b.
Planting dates for popular crops in Coeur d'Alene
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Apr 15 to 29 | Jun 10 to 24 | — |
| Strawberries | — | Mar 11 to 25 | — |
| Lettuce | Feb 25 to Mar 11 | Apr 15 to 29 | Jul 19 to Aug 23 |
| Cilantro | Mar 11 to 25 | Apr 22 to 29 | — |
| Basil | Apr 22 to May 6 | Jun 10 to 17 | — |
| Potatoes | — | Apr 29 to May 6 | — |
| Garlic | — | Mar 11 to 25 | Oct 18 to Nov 1 |
| Onions | Dec 31 to Feb 11 | Mar 25 to Apr 8 | — |
| Cucumbers | May 13 to 27 | Jun 10 to 24 | — |
| Pumpkins | May 13 to 27 | Jun 10 to 24 | — |
| Peppers | Mar 25 to Apr 22 | Jun 10 to 24 | — |
| Carrots | — | Apr 1 to 22 | Jul 26 to Aug 16 |
| Sweet Potatoes | — | Jun 29 to Jul 6 | — |
| Watermelons | May 6 to 20 | Jun 10 to 24 | — |
| Sweet Corn | — | Apr 29 to May 13 | — |
| Green Beans | — | Jun 10 to 24 | — |
| Zucchini | May 13 to 27 | Jun 10 to 24 | — |
| Broccoli | Feb 4 to 25 | Mar 25 to Apr 8 | Aug 2 to 30 |
| Peas | — | Mar 11 to 25 | Jul 26 to Aug 9 |
| Spinach | Mar 11 to 18 | Apr 15 to 29 | Aug 9 to Sep 13 |
| Sunflowers | — | Apr 29 to May 20 | — |
| Zinnias | Jun 16 to 23 | Jul 14 to 28 | — |
| Tulips | — | — | Sep 6 to Nov 1 |
| Daffodils | — | — | Sep 6 to Oct 18 |
| Grass Seed | — | Mar 11 to 25 | Sep 6 to 20 |
Nearby cities
- Spokane Valley, WA zone 7a, last frost Apr 26
- Spokane, WA zone 6b, last frost Apr 26
- Missoula, MT zone 5b, last frost May 10
- Pasco, WA zone 7a, last frost Apr 7
- Richland, WA zone 7b, last frost Apr 6
- Kennewick, WA zone 7b, last frost Mar 28
Planting in IdahoAbout zone 6bPrintable calendar for Coeur d'Alene
Questions
When is the last frost in Coeur d'Alene?
Around April 22 in a typical year, based on NOAA's 1991-2020 records for Coeur D'Alene. There is still a 1 in 10 chance of frost after May 6.
What planting zone is Coeur d'Alene in?
USDA hardiness zone 6b (2023 map). The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.
When should I plant tomatoes in Coeur d'Alene?
Start seeds indoors April 15 to 29 and set plants out June 10 to 24.
When is the first frost in Coeur d'Alene?
Around October 18 in a typical year, and before October 4 about 1 year in 10.