Calendars by city / UT
Salt Lake City, Utah vegetable planting calendar
Planting windows for Salt Lake City, Utah built from the NOAA 1991–2020 freeze normals at SALT LAKE CITY INTERNATIONAL AIRPORT, UT US (station USW00024127), not from a hardiness zone.
Salt Lake City, Utah planting dates for 27 vegetables
The same windows as a table
Each row applies a published extension rule to the frost dates above. Hardy crops go out 2–4 weeks before the last frost; semi-hardy crops 0–2 weeks before; tender crops around the frost date; very tender crops 2 or more weeks after. The last fall planting date counts the crop's days to harvest back from the first fall frost. The rules and their sources are on the methodology page.
| Crop | Frost class | Start seeds indoors | Plant outdoors | Last fall planting | Days to harvest |
|---|---|---|---|---|---|
| Beets | Semi-hardy | — (direct sow) | Direct sow: Apr 7 – Apr 21 | Sep 1 | 60 |
| Broccoli | Hardy | Feb 3 – Mar 3 | Transplant: Mar 24 – Apr 7 | Sep 3 | 65 (from transplant) |
| Cabbage | Hardy | Feb 3 – Mar 3 | Transplant: Mar 24 – Apr 7 | Aug 14 | 85 (from transplant) |
| Carrots | Semi-hardy | — (direct sow) | Direct sow: Apr 7 – Apr 21 | Aug 22 | 70 |
| Cauliflower | Semi-hardy | Feb 17 – Mar 17 | Transplant: Apr 7 – Apr 21 | Aug 27 | 65 (from transplant) |
| Kohlrabi | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Sep 18 | 50 |
| Lettuce (leaf) | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Sep 8 | 60 |
| Onions (green) | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Sep 8 | 60 |
| Onions (dry, from seed) | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Jul 20 | 110 |
| Onions (dry, from sets) | Hardy | — (direct sow) | Plant sets: Mar 24 – Apr 7 | Jul 20 | 110 |
| Parsnips | Semi-hardy | — (direct sow) | Direct sow: Apr 7 – Apr 21 | Aug 22 | 70 |
| Peas | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Sep 3 | 65 |
| Potatoes | Semi-hardy | — (direct sow) | Plant seed potatoes: Apr 7 – Apr 21 | Jun 28 | 125 |
| Radishes | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Oct 8 | 30 |
| Spinach | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Sep 28 | 40 |
| Swiss chard | Semi-hardy | — (direct sow) | Direct sow: Apr 7 – Apr 21 | Sep 1 | 60 |
| Turnips | Hardy | — (direct sow) | Direct sow: Mar 24 – Apr 7 | Sep 18 | 50 |
| Snap beans | Tender | — (direct sow) | Direct sow: Apr 21 – Apr 28 | Aug 25 | 60 |
| Cantaloupe | Very tender | Apr 14 – May 5 | Direct sow (or transplant): May 5 – May 19 | Jul 31 | 85 |
| Sweet corn | Tender | — (direct sow) | Direct sow: Apr 21 – Apr 28 | Jul 26 | 60–90 |
| Cucumbers | Tender | Mar 31 – Apr 14 | Direct sow (or transplant): Apr 21 – Apr 28 | Aug 30 | 55 |
| Eggplant | Very tender | Mar 3 – Apr 7 | Transplant: May 5 – May 19 | Aug 25 | 60 (from transplant) |
| Peppers | Very tender | Mar 10 – Apr 7 | Transplant: May 5 – May 19 | Aug 15 | 70 (from transplant) |
| Tomatoes | Very tender | Mar 17 – Apr 14 | Transplant: May 5 – May 19 | Aug 20 | 65 (from transplant) |
| Summer squash | Tender | Mar 31 – Apr 14 | Direct sow (or transplant): Apr 21 – Apr 28 | Sep 4 | 50 |
| Winter squash | Very tender | Apr 14 – May 5 | Direct sow (or transplant): May 5 – May 19 | Jul 16 | 100 |
| Watermelon | Very tender | Apr 14 – May 5 | Direct sow (or transplant): May 5 – May 19 | Jul 31 | 85 |
What the Salt Lake City, Utah frost-free season means for your choices
At 186 frost-free days, Salt Lake City, Utah gardeners should compare that number to the days-to-harvest column before buying seed. A crop whose days to harvest plus its transplant age is close to the season length needs either an early start indoors or a short-season variety.
- Hardy crops (peas, spinach, radishes, lettuce, broccoli, cabbage) can go in from about Mar 24 – Apr 7 and again for fall.
- Very tender crops (tomatoes, peppers, eggplant, melons, winter squash) should wait until May 5 – May 19; start tomato seeds indoors Mar 17 – Apr 14.
- Fall sowing is worthwhile only for the rows that show a separate fall date; for the others the spring window already covers the season.
Salt Lake City, UT planting questions
When is the last frost in Salt Lake City, Utah?
The 50% probability date for the last spring 32°F reading at SALT LAKE CITY INTERNATIONAL AIRPORT, UT US is Apr 21, from the NOAA 1991–2020 climate normals. In half the years on that record the last frost came later than that date, so tender crops are safer a week or two after it. The last 28°F hard freeze averages Apr 1.
When can I plant tomatoes in Salt Lake City, Utah?
Tomatoes are a very tender crop, so the Colorado State Extension rule puts them out 2 or more weeks after the last spring frost: May 5 – May 19 in Salt Lake City, Utah. Start the seeds indoors Mar 17 – Apr 14, which is 5 to 7 weeks before that transplant window.
How long is the growing season in Salt Lake City, Utah?
Salt Lake City, Utah averages 186 frost-free days, between the 50% last spring frost on Apr 21 and the 50% first fall frost on Oct 24 at SALT LAKE CITY INTERNATIONAL AIRPORT, UT US. Check a variety's days to harvest against that number before buying seed.
When should I start seeds indoors in Salt Lake City, Utah?
The earliest indoor sowing on this calendar is broccoli and cabbage at Feb 3 – Mar 3. Hardy crops are transplanted out Mar 24 – Apr 7 here, and each crop's indoor window is simply its outdoor window minus the transplant age published by Colorado State Extension, so nothing starts earlier than that.
What can I plant in fall in Salt Lake City, Utah?
The crops with a separate fall sowing here, latest first, are radishes, spinach, kohlrabi, turnips, lettuce (leaf) and onions (green), plus 21 more on the chart above. Each fall date counts the crop's days to harvest back from the first fall frost on Oct 24, plus an allowance for frost-tolerant crops that is our own assumption, not the source's.
Station data and limitations
| NOAA station | SALT LAKE CITY INTERNATIONAL AIRPORT, UT US (USW00024127) |
|---|---|
| Location | 40.7781, -111.9694 · elevation 1287.8 m |
| Last spring 32°F / 28°F (50%) | Apr 21 / Apr 1 |
| First fall 32°F / 28°F (50%) | Oct 24 / Nov 5 |
| Dataset | NOAA/NCEI U.S. Climate Normals 1991–2020, annual/seasonal product, data types ANN-TMIN-PRBLST/PRBFST-T32FP50 and T28FP50 |
| Retrieved | 2026-10-16 |
The normals describe the airport station, not your yard. They are averages of a 30-year record and say nothing about this year's weather. Watch the local forecast around the dates shown, and use soil temperature for warm-season crops, which the Colorado State guide treats as the better signal.
Nearby calendars
- Denver, Colorado — last spring frost May 6
- Phoenix, Arizona — last spring frost Jan 6
- Sacramento, California — last spring frost Feb 9
- Los Angeles, California
Read the method behind these dates: last frost date vs hardiness zone.