When to plant in Garden City, ID
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Garden City, Idaho — is derived from the closest NOAA station with complete climate normals.
In zone 7a, Garden City supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
BOISE 7 N · 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 Garden City’s own odds, recorded at BOISE 7 N.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 23 | Jun 6 | May 18 | Sep 13 | Sep 29 | Oct 16 |
| 32°F | Jun 10 | May 17 | Apr 27 | Sep 27 | Oct 12 | Oct 30 |
| 28°F | May 19 | Apr 27 | Apr 7 | Oct 8 | Oct 24 | Nov 11 |
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 Garden City, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Garden City planting FAQ
When is the last spring frost in Garden City, ID?
Garden City's average last spring frost falls near May 17 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Garden City, ID?
Expect Garden City's first fall frost near October 12 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Garden City in?
Garden City is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Garden City?
Garden City has about 148 frost-free days — a short growing season — between the average last spring frost (May 17) and first fall frost (October 12).
When should I plant tomatoes in Garden City?
For Garden City, sow tomatoes indoors about March 22–April 5 and move the seedlings out around May 24, after the last spring frost.
Never miss a window in Garden City
An email when it’s time to start seeds, transplant, and sow — timed to Garden City’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at BOISE 7 N, 11 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 Garden City, ID — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00101017. Retrieved from https://blissgarden.com/idaho/garden-city.