When to plant in Knik-Fairview, AK
USDA Zone 5aKnik-Fairview, Alaska frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Knik-Fairview's nearest full-normals station sits about 17 km out, so treat these as a close estimate — local microclimate can nudge your first and last frost. Zone 5a means Knik-Fairview sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
EKLUTNA WTP · 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 Knik-Fairview’s own odds, recorded at EKLUTNA WTP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 12 | Jun 1 | May 22 | Aug 26 | Sep 8 | Sep 21 |
| 32°F | May 30 | May 18 | May 6 | Sep 4 | Sep 20 | Oct 4 |
| 28°F | May 15 | May 3 | Apr 18 | Sep 16 | Sep 30 | Oct 14 |
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 Knik-Fairview, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 21 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.
Knik-Fairview planting FAQ
When is the last spring frost in Knik-Fairview, AK?
Knik-Fairview's average last spring frost falls near May 18 — 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 Knik-Fairview, AK?
In Knik-Fairview, the first 32°F freeze of fall lands around September 20 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Knik-Fairview in?
Knik-Fairview is in USDA hardiness zone 5a. In zone 5a, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Knik-Fairview?
There are roughly 125 frost-free days in Knik-Fairview (a short growing season), running from the average last frost around May 18 to the first fall frost near September 20.
When should I plant tomatoes in Knik-Fairview?
In Knik-Fairview, start tomato seeds indoors around March 23–April 6, then transplant seedlings outdoors around May 25 once the danger of frost has passed.
Never miss a window in Knik-Fairview
An email when it’s time to start seeds, transplant, and sow — timed to Knik-Fairview’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- North Lakes · 21 km
- Anchorage · 41 km
- Fairbanks · 383 km
- Badger · 383 km
- College · 384 km
- Juneau city and · 925 km
- Birch Bay · 2178 km
- Lynden · 2190 km
Frost dates recorded at EKLUTNA WTP, 17 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 Knik-Fairview, AK — Frost Dates & Zone 5a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00502737. Retrieved from https://blissgarden.com/alaska/knik-fairview.