Salt Lake City, UT planting zone & frost dates
Salt Lake City is in USDA hardiness zone 7b. The last spring frost usually comes around March 31 and the first fall frost around November 8, for a growing season of about 224 days.
Planting calendar for Salt Lake City
Dates are counted from the average last spring frost (March 31) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Feb 3 – Feb 17 Transplant outdoors: Apr 7 – Apr 14 |
| Peppers | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Apr 14 – Apr 21 |
| Eggplant | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Apr 14 – Apr 21 |
| Broccoli | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Mar 3 – Mar 17 |
| Cabbage | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Mar 3 – Mar 17 |
| Onions (sets) | Plant outdoors: Mar 3 – Mar 17 |
| Peas | Sow outdoors: Feb 17 – Mar 3 |
| Spinach | Sow outdoors: Feb 17 – Mar 3 |
| Lettuce | Sow outdoors: Mar 3 – Mar 17 |
| Carrots | Sow outdoors: Mar 3 – Mar 17 |
| Potatoes | Plant outdoors: Mar 3 – Mar 17 |
| Beans | Sow outdoors: Apr 7 – Apr 14 |
| Sweet corn | Sow outdoors: Apr 7 – Apr 14 |
| Cucumbers | Sow outdoors: Apr 7 – Apr 14 |
| Squash & zucchini | Sow outdoors: Apr 7 – Apr 14 |
| Basil | Start seeds indoors: Feb 17 – Mar 3 Transplant outdoors: Apr 7 – Apr 14 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 13 (8 weeks before the average first fall frost on Nov 8).
Useful for zone 7b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 7 | Mar 31 | Apr 19 |
| First 32°F frost in fall is before | Nov 25 | Nov 8 | Oct 23 |
How to read it: in spring there is a 10% chance of a frost after April 19, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 23. A hard freeze (28°F) usually ends around March 8.
Hardiness zone by ZIP code in Salt Lake City
- 84101 zone 7b
- 84102 zone 7b
- 84103 zone 6b
- 84104 zone 7b
- 84105 zone 7b
- 84106 zone 7b
- 84107 zone 7b
- 84108 zone 6b
- 84109 zone 6b
- 84110 zone 7b
- 84111 zone 7b
- 84112 zone 7a
- 84113 zone 7a
- 84114 zone 7b
- 84115 zone 7b
- 84116 zone 7b
- 84117 zone 7b
- 84118 zone 7b
- 84121 zone 6a
- 84122 zone 7b
- 84123 zone 7b
- 84124 zone 7b
- 84125 zone 7b
- 84126 zone 7b
- 84127 zone 7b
- 84129 zone 7b
- 84130 zone 7b
- 84131 zone 7b
- 84132 zone 7a
- 84133 zone 7b
- 84134 zone 7b
- 84139 zone 7b
- 84141 zone 7b
- 84145 zone 7b
- 84147 zone 7b
- 84148 zone 7b
- 84151 zone 7b
- 84152 zone 7b
- 84157 zone 7b
- 84158 zone 7a
- 84165 zone 7b
- 84170 zone 7b
- 84171 zone 7b
- 84180 zone 7b
- 84184 zone 7b
- 84190 zone 7b
- 84199 zone 7b
Nearby cities
- South Salt Lake zone 7b, last frost Mar 31
- Millcreek zone 7b, last frost Apr 25
- Canyon Rim zone 7b, last frost Apr 25
- North Salt Lake zone 7b, last frost Apr 24
- Murray zone 7b, last frost Apr 25
- East Millcreek zone 7b, last frost Apr 25
- Taylorsville zone 7b, last frost Mar 31
- Woods Cross zone 7a, last frost Apr 24
Questions
What growing zone is Salt Lake City, UT?
Salt Lake City is in USDA Plant Hardiness Zone 7b (average extreme winter low 5°F to 10°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zones 6a, 6b, 7a.
When is the last frost in Salt Lake City?
The average last spring frost (32°F) in Salt Lake City is March 31. There is still a 10% chance of frost until April 19.
When can I plant tomatoes in Salt Lake City?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 7 – Apr 14. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Salt Lake Triad Ctr, UT (USC00427606), 1.2 km (0.7 mi) from the city center, elevation 1304 m, based on 13 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.