When to plant in Coeur d'Alene, ID
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Coeur d'Alene, Idaho — is derived from the closest NOAA station with complete climate normals.
In zone 6b, Coeur d'Alene gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
COEUR D'ALENE · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Coeur d'Alene’s own odds, recorded at COEUR D'ALENE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 21 | May 7 | Apr 25 | Sep 23 | Oct 6 | Oct 21 |
| 32°F | May 6 | Apr 22 | Apr 4 | Oct 4 | Oct 18 | Nov 5 |
| 28°F | Apr 21 | Apr 1 | Mar 13 | Oct 15 | Nov 1 | Nov 20 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Coeur d'Alene, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 39 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Coeur d'Alene planting FAQ
When is the last spring frost in Coeur d'Alene, ID?
On average, the last spring frost in Coeur d'Alene is around April 22 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Coeur d'Alene, ID?
Expect Coeur d'Alene's first fall frost near October 18 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Coeur d'Alene in?
Coeur d'Alene is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Coeur d'Alene?
Coeur d'Alene has about 179 frost-free days — a moderate growing season — between the average last spring frost (April 22) and first fall frost (October 18).
When should I plant tomatoes in Coeur d'Alene?
For Coeur d'Alene, sow tomatoes indoors about February 25–March 11 and move the seedlings out around April 29, after the last spring frost.
Never miss a window in Coeur d'Alene
An email when it’s time to start seeds, transplant, and sow — timed to Coeur d'Alene’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Hayden · 7 km
- Post Falls · 11 km
- Rathdrum · 12 km
- Liberty Lake · 23 km
- Spokane Valley · 33 km
- Spokane · 48 km
- Airway Heights · 59 km
- Cheney · 63 km
Frost dates recorded at COEUR D'ALENE, 2 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Coeur d'Alene, ID — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00101956. Retrieved from https://blissgarden.com/idaho/coeur-dalene.