Frost Dates for Salt Lake City, UT 84123
Salt Lake City has 24 ZIP codes. The Salt Lake City, UT frost page lists all of them with their dates.
Last spring frost April 27 · First fall frost October 18 · 174 frost-free days · USDA Zone 7b
ZIP 84123 has about 37,100 people, one of 24 ZIP codes in Salt Lake City.
Moderate season: 174 frost-free days. Spring frost risk spans April 5–May 20 (45 days). Fall frost risk spans September 29–November 7 (39 days).
Frost probability for 84123
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 20 | April 27 | April 5 |
| Fall (first frost) | September 29 | October 18 | November 7 |
Dates come from NOAA 1971–2000 freeze probabilities at COTTONWOOD WEIR (12.5 km away); the 50% date is the median year.
Which crops fit a 174-day season in Salt Lake City
In Salt Lake City (174 frost-free days, a moderate season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Mar 23 | May 11–May 18 | 132 | fits: 80 days to maturity, 132 available after May 11. | Jun 18 |
| Pepper | Mar 16 | May 11–May 18 | 132 | fits: 75 days to maturity, 132 available after May 11. | Jun 23 |
| Lettuce | Mar 2 | Mar 30–Apr 6 | 209 | two-plantings: Plant Mar 30 and again by Aug 27; both mature before Oct 25. | Aug 27 |
| Carrots | — | Apr 6–Apr 13 | 216 | fits: 70 days to maturity, 216 available after Apr 6. | Aug 16 |
| Cucumber | Apr 6 | May 11–May 18 | 146 | two-plantings: Plant May 11 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Beans | — | May 4–May 18 | 160 | two-plantings: Plant May 4 and again by Jul 29; both mature before Oct 11. | Jul 29 |
| Peas | — | Mar 2–May 11 | 237 | fits: 65 days to maturity, 237 available after Mar 2. | Aug 7 |
| Zucchini | Apr 13 | May 11–May 18 | 146 | two-plantings: Plant May 11 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Onion | Feb 2 | Mar 30–Apr 13 | 209 | fits: 100 days to maturity, 209 available after Mar 30. | — |
| Spinach | — | Mar 2–Apr 20 | 251 | two-plantings: Plant Mar 2 and again by Sep 15; both mature before Nov 8. | Sep 15 |
| Kale | Feb 16 | Mar 30–Apr 13 | 223 | two-plantings: Plant Mar 30 and again by Aug 31; both mature before Nov 8. | Aug 31 |
| Broccoli | Mar 2 | Mar 30–Apr 13 | 209 | fits: 80 days to maturity, 209 available after Mar 30. | Jul 23 |
| Cabbage | Mar 2 | Mar 30–Apr 13 | 223 | fits: 70 days to maturity, 223 available after Mar 30. | Aug 16 |
| Radish | — | Mar 2–May 25 | 237 | two-plantings: Plant Mar 2 and again by Sep 16; both mature before Oct 25. | Sep 16 |
| Beets | — | Mar 2–May 25 | 237 | two-plantings: Plant Mar 2 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Potatoes | — | Apr 13–Apr 20 | 195 | fits: 90 days to maturity, 195 available after Apr 13. | — |
| Garlic | — | Oct 18 | 279 | overwinter: Plant Oct 18 to Nov 8; harvest the following summer. | Nov 8 |
| Strawberry | — | Mar 23–May 18 | 230 | perennial: A perennial: plant Mar 23; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 30 | May 4–May 11 | 146 | fits: 75 days to maturity, 146 available after May 4. | Jun 30 |
| Pumpkin | Apr 13 | May 11–May 11 | 139 | fits: 100 days to maturity, 139 available after May 11. | Jun 5 |
| Cauliflower | Mar 16 | Apr 20–May 4 | 188 | fits: 75 days to maturity, 188 available after Apr 20. | Jul 28 |
| Swiss Chard | Mar 2 | Apr 13–Apr 13 | 195 | two-plantings: Plant Apr 13 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Arugula | — | Mar 2–May 25 | 251 | two-plantings: Plant Mar 2 and again by Sep 15; both mature before Nov 8. | Sep 15 |
| Brussel Sprouts | Mar 2 | Mar 30–Apr 13 | 223 | fits: 100 days to maturity, 223 available after Mar 30. | Jul 17 |
| Butternut Squash | Apr 13 | May 11–May 18 | 139 | fits: 100 days to maturity, 139 available after May 11. | Jun 5 |
| Eggplant | Mar 9 | May 11–May 18 | 132 | fits: 70 days to maturity, 132 available after May 11. | Jun 28 |
| Okra | Mar 30 | May 4–May 11 | 153 | two-plantings: Plant May 4 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Basil | Mar 23 | May 18–May 18 | 139 | two-plantings: Plant May 18 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Cilantro | — | Mar 30–Apr 20 | 209 | two-plantings: Plant Mar 30 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Parsley | Feb 16 | May 4–May 11 | 174 | fits: 70 days to maturity, 174 available after May 4. | Aug 2 |
| Celery | Feb 16 | May 4–May 18 | 174 | fits: 120 days to maturity, 174 available after May 4. | Jun 13 |
| Scallions | Feb 16 | Mar 30–Apr 13 | 223 | two-plantings: Plant Mar 30 and again by Aug 26; both mature before Nov 8. | Aug 26 |
| Turnip | — | Mar 30–Apr 13 | 223 | two-plantings: Plant Mar 30 and again by Sep 5; both mature before Nov 8. | Sep 5 |
| Kohlrabi | — | Mar 16–Mar 30 | 237 | two-plantings: Plant Mar 16 and again by Aug 31; both mature before Nov 8. | Aug 31 |
| Bok Choy | Mar 30 | Apr 20–Apr 27 | 188 | two-plantings: Plant Apr 20 and again by Aug 27; both mature before Oct 25. | Aug 27 |
| Collards | Feb 16 | Mar 30–Apr 13 | 223 | two-plantings: Plant Mar 30 and again by Aug 26; both mature before Nov 8. | Aug 26 |
| Cantaloupe | Apr 13 | May 11–May 18 | 132 | fits: 85 days to maturity, 132 available after May 11. | Jun 13 |
| Chives | Feb 2 | May 4–May 11 | 188 | fits: 90 days to maturity, 188 available after May 4. | — |
| Dill | — | Mar 2–May 25 | 237 | two-plantings: Plant Mar 2 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Oregano | Feb 16 | May 4–May 11 | 188 | fits: 80 days to maturity, 188 available after May 4. | — |
| Rosemary | Feb 2 | May 4–May 11 | 174 | fits: 80 days to maturity, 174 available after May 4. | — |
| Sage | Mar 2 | May 4–May 11 | 188 | fits: 75 days to maturity, 188 available after May 4. | — |
| Thyme | Feb 16 | May 4–May 11 | 188 | fits: 90 days to maturity, 188 available after May 4. | — |
| Calendula | Mar 16 | Apr 13–Apr 27 | 195 | two-plantings: Plant Apr 13 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Cosmos | Mar 30 | Apr 27–May 11 | 160 | two-plantings: Plant Apr 27 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Lavender | Feb 2 | Apr 27–May 11 | 195 | fits: 90 days to maturity, 195 available after Apr 27. | — |
| Marigolds | Mar 16 | Apr 27–May 4 | 160 | two-plantings: Plant Apr 27 and again by Aug 1; both mature before Oct 4. | Aug 1 |
| Melons | Apr 13 | May 11–May 18 | 132 | fits: 85 days to maturity, 132 available after May 11. | Jun 13 |
| Mint | — | Apr 27–May 11 | 195 | fits: 90 days to maturity, 195 available after Apr 27. | — |
| Nasturtiums | Mar 30 | Apr 27–May 4 | 160 | two-plantings: Plant Apr 27 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Pole Beans | — | May 4–May 18 | 153 | fits: 65 days to maturity, 153 available after May 4. | Jul 17 |
| Spaghetti Squash | Apr 13 | May 11–May 18 | 139 | fits: 90 days to maturity, 139 available after May 11. | Jun 15 |
| Sunflowers | — | Apr 27–May 11 | 160 | fits: 70 days to maturity, 160 available after Apr 27. | Jul 12 |
| Tomatillos | Mar 2 | May 4–May 11 | 139 | fits: 75 days to maturity, 139 available after May 4. | Jun 23 |
| Watermelon | Apr 13 | May 4–May 11 | 139 | fits: 80 days to maturity, 139 available after May 4. | Jun 18 |
| Yellow Squash | Apr 13 | May 11–May 18 | 146 | two-plantings: Plant May 11 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Zinnias | Mar 30 | Apr 27–May 11 | 160 | two-plantings: Plant Apr 27 and again by Jul 22; both mature before Oct 4. | Jul 22 |
Month by month in Salt Lake City
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 2), Lavender (Feb 2), Onion (Feb 2), Rosemary (Feb 2), Celery (Feb 16), Collards (Feb 16), +5 more. |
| March | Start indoors: Broccoli (Mar 2), Brussel Sprouts (Mar 2), Cabbage (Mar 2), Lettuce (Mar 2), Sage (Mar 2), Swiss Chard (Mar 2), +14 more. Direct sow from: Arugula (Mar 2), Beets (Mar 2), Dill (Mar 2), Peas (Mar 2), Radish (Mar 2), Spinach (Mar 2), +3 more. Transplant from: Broccoli (Mar 30), Brussel Sprouts (Mar 30), Cabbage (Mar 30), Collards (Mar 30), Kale (Mar 30), Lettuce (Mar 30), +2 more. Plant: Strawberry (Mar 23). |
| April | Start indoors: Cucumber (Apr 6), Butternut Squash (Apr 13), Cantaloupe (Apr 13), Melons (Apr 13), Pumpkin (Apr 13), Spaghetti Squash (Apr 13), +3 more. Direct sow from: Carrots (Apr 6), Potatoes (Apr 13), Sunflowers (Apr 27). Transplant from: Calendula (Apr 13), Swiss Chard (Apr 13), Bok Choy (Apr 20), Cauliflower (Apr 20), Cosmos (Apr 27), Lavender (Apr 27), +4 more. Last frost around April 27. |
| May | Direct sow from: Beans (May 4), Pole Beans (May 4). Transplant from: Celery (May 4), Chives (May 4), Corn (May 4), Okra (May 4), Oregano (May 4), Parsley (May 4), +17 more. |
| June | Last sowing dates: Butternut Squash (Jun 5), Pumpkin (Jun 5), Cantaloupe (Jun 13), Celery (Jun 13), Melons (Jun 13), Spaghetti Squash (Jun 15), +6 more. |
| July | Last sowing dates: Sunflowers (Jul 12), Brussel Sprouts (Jul 17), Pole Beans (Jul 17), Basil (Jul 22), Cosmos (Jul 22), Cucumber (Jul 22), +8 more. |
| August | Last sowing dates: Marigolds (Aug 1), Parsley (Aug 2), Peas (Aug 7), Cabbage (Aug 16), Carrots (Aug 16), Beets (Aug 17), +10 more. |
| September | Last sowing dates: Turnip (Sep 5), Arugula (Sep 15), Spinach (Sep 15), Radish (Sep 16). |
| October | Direct sow from: Garlic (Oct 18). First frost around October 18. |
| November | Last sowing dates: Garlic (Nov 8). |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Salt Lake City, UT (ZIP 84123)?
The median last spring frost date for Salt Lake City, UT (ZIP code 84123) is around April 27. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before April 5; one in ten it runs past May 20.
What is the first fall frost date in Salt Lake City, UT?
The median first fall frost date for Salt Lake City, UT is around October 18. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around September 29 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Salt Lake City, UT?
The frost-free growing season in Salt Lake City is about 174 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Salt Lake City (174 frost-free days, a moderate season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Salt Lake City, UT?
Salt Lake City, UT is in USDA hardiness zone 7b (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Salt Lake City, UT?
Start tomatoes indoors Mar 23 and plant out May 11 in Salt Lake City. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Salt Lake City?
Two: plant Mar 30 and again by Aug 27; both mature before Oct 25.
When do I plant garlic in Salt Lake City?
Oct 18 to Nov 8; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
West Valley City (ZIP 84120) has 186 frost-free days, 12 more than Salt Lake City (ZIP 84123). See West Valley City ZIP 84120 frost dates
Nearby and related
- Frost dates for Midvale, UT 84047 (3.4 mi)
- Frost dates for West Jordan, UT 84084 (3.4 mi)
- Frost dates for West Jordan, UT 84088 (4.8 mi)
- Frost dates for West Valley City, UT 84120 (5 mi)
- Frost dates for Sandy, UT 84070 (5.9 mi)
- When to plant in Salt Lake City, UT: month-by-month guide
- When to plant in UT
- When to plant Peppers in UT
- When to plant Cucumbers in UT
- When to plant Zucchini in UT
- When to plant Butternut Squash in UT
- When to plant Basil in UT
- When to plant Sweet Corn in UT
- Look up another ZIP