Frost Dates for Cedar City, UT 84721
Last spring frost May 21 · First fall frost October 1 · 133 frost-free days · USDA Zone 6b
ZIP 84721 has about 30,600 people, the largest of 2 ZIP codes in Cedar City.
Moderate season: 133 frost-free days. Spring frost risk spans May 4–June 7 (34 days). Fall frost risk spans September 15–October 18 (33 days).
Frost probability for 84721
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 7 | May 21 | May 4 |
| Fall (first frost) | September 15 | October 1 | October 18 |
Dates come from NOAA 1971–2000 freeze probabilities at CEDAR CITY AP (7.7 km away); the 50% date is the median year.
Frost dates by ZIP code in Cedar City, UT
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 84721 | May 21 | October 1 | 6b |
| 84720 | May 10 | October 9 | 6b |
Which crops fit a 133-day season in Cedar City
In Cedar City (133 frost-free days, a moderate season), 37 of 56 planner crops fit outright, 16 get two plantings, 2 need an indoor start, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 16 | Jun 4–Jun 11 | 91 | fits: 80 days to maturity, 91 available after Jun 4. | — |
| Pepper | Apr 9 | Jun 4–Jun 11 | 91 | fits: 75 days to maturity, 91 available after Jun 4. | Jun 6 |
| Lettuce | Mar 26 | Apr 23–Apr 30 | 168 | two-plantings: Plant Apr 23 and again by Aug 10; both mature before Oct 8. | Aug 10 |
| Carrots | — | Apr 30–May 7 | 175 | fits: 70 days to maturity, 175 available after Apr 30. | Jul 30 |
| Cucumber | Apr 30 | Jun 4–Jun 11 | 105 | fits: 60 days to maturity, 105 available after Jun 4. | Jul 5 |
| Beans | — | May 28–Jun 11 | 119 | fits: 60 days to maturity, 119 available after May 28. | Jul 12 |
| Peas | — | Mar 26–Jun 4 | 196 | fits: 65 days to maturity, 196 available after Mar 26. | Jul 21 |
| Zucchini | May 7 | Jun 4–Jun 11 | 105 | fits: 55 days to maturity, 105 available after Jun 4. | Jul 10 |
| Onion | Feb 26 | Apr 23–May 7 | 168 | fits: 100 days to maturity, 168 available after Apr 23. | — |
| Spinach | — | Mar 26–May 14 | 210 | two-plantings: Plant Mar 26 and again by Aug 29; both mature before Oct 22. | Aug 29 |
| Kale | Mar 12 | Apr 23–May 7 | 182 | two-plantings: Plant Apr 23 and again by Aug 14; both mature before Oct 22. | Aug 14 |
| Broccoli | Mar 26 | Apr 23–May 7 | 168 | fits: 80 days to maturity, 168 available after Apr 23. | Jul 6 |
| Cabbage | Mar 26 | Apr 23–May 7 | 182 | fits: 70 days to maturity, 182 available after Apr 23. | Jul 30 |
| Radish | — | Mar 26–Jun 18 | 196 | two-plantings: Plant Mar 26 and again by Aug 30; both mature before Oct 8. | Aug 30 |
| Beets | — | Mar 26–Jun 18 | 196 | two-plantings: Plant Mar 26 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Potatoes | — | May 7–May 14 | 154 | fits: 90 days to maturity, 154 available after May 7. | — |
| Garlic | — | Oct 1 | 238 | overwinter: Plant Oct 1 to Oct 22; harvest the following summer. | Oct 22 |
| Strawberry | — | Apr 16–Jun 11 | 189 | perennial: A perennial: plant Apr 16; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 23 | May 28–Jun 4 | 105 | fits: 75 days to maturity, 105 available after May 28. | Jun 13 |
| Pumpkin | May 7 | Jun 4–Jun 4 | 98 | head-start: Even planted out Jun 4, the outdoor season is about 2 days short; choose an early variety or grow under cover. | — |
| Cauliflower | Apr 9 | May 14–May 28 | 147 | fits: 75 days to maturity, 147 available after May 14. | Jul 11 |
| Swiss Chard | Mar 26 | May 7–May 7 | 154 | two-plantings: Plant May 7 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Arugula | — | Mar 26–Jun 18 | 210 | two-plantings: Plant Mar 26 and again by Aug 29; both mature before Oct 22. | Aug 29 |
| Brussel Sprouts | Mar 26 | Apr 23–May 7 | 182 | fits: 100 days to maturity, 182 available after Apr 23. | Jun 30 |
| Butternut Squash | May 7 | Jun 4–Jun 11 | 98 | head-start: Even planted out Jun 4, the outdoor season is about 2 days short; choose an early variety or grow under cover. | — |
| Eggplant | Apr 2 | Jun 4–Jun 11 | 91 | fits: 70 days to maturity, 91 available after Jun 4. | Jun 11 |
| Okra | Apr 23 | May 28–Jun 4 | 112 | fits: 55 days to maturity, 112 available after May 28. | Jul 10 |
| Basil | Apr 16 | Jun 11–Jun 11 | 98 | fits: 60 days to maturity, 98 available after Jun 11. | Jul 5 |
| Cilantro | — | Apr 23–May 14 | 168 | two-plantings: Plant Apr 23 and again by Aug 5; both mature before Oct 8. | Aug 5 |
| Parsley | Mar 12 | May 28–Jun 4 | 133 | fits: 70 days to maturity, 133 available after May 28. | Jul 16 |
| Celery | Mar 12 | May 28–Jun 11 | 133 | fits: 120 days to maturity, 133 available after May 28. | — |
| Scallions | Mar 12 | Apr 23–May 7 | 182 | two-plantings: Plant Apr 23 and again by Aug 9; both mature before Oct 22. | Aug 9 |
| Turnip | — | Apr 23–May 7 | 182 | two-plantings: Plant Apr 23 and again by Aug 19; both mature before Oct 22. | Aug 19 |
| Kohlrabi | — | Apr 9–Apr 23 | 196 | two-plantings: Plant Apr 9 and again by Aug 14; both mature before Oct 22. | Aug 14 |
| Bok Choy | Apr 23 | May 14–May 21 | 147 | two-plantings: Plant May 14 and again by Aug 10; both mature before Oct 8. | Aug 10 |
| Collards | Mar 12 | Apr 23–May 7 | 182 | two-plantings: Plant Apr 23 and again by Aug 9; both mature before Oct 22. | Aug 9 |
| Cantaloupe | May 7 | Jun 4–Jun 11 | 91 | fits: 85 days to maturity, 91 available after Jun 4. | — |
| Chives | Feb 26 | May 28–Jun 4 | 147 | fits: 90 days to maturity, 147 available after May 28. | — |
| Dill | — | Mar 26–Jun 18 | 196 | two-plantings: Plant Mar 26 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Oregano | Mar 12 | May 28–Jun 4 | 147 | fits: 80 days to maturity, 147 available after May 28. | — |
| Rosemary | Feb 26 | May 28–Jun 4 | 133 | fits: 80 days to maturity, 133 available after May 28. | — |
| Sage | Mar 26 | May 28–Jun 4 | 147 | fits: 75 days to maturity, 147 available after May 28. | — |
| Thyme | Mar 12 | May 28–Jun 4 | 147 | fits: 90 days to maturity, 147 available after May 28. | — |
| Calendula | Apr 9 | May 7–May 21 | 154 | two-plantings: Plant May 7 and again by Aug 5; both mature before Oct 8. | Aug 5 |
| Cosmos | Apr 23 | May 21–Jun 4 | 119 | fits: 60 days to maturity, 119 available after May 21. | Jul 5 |
| Lavender | Feb 26 | May 21–Jun 4 | 154 | fits: 90 days to maturity, 154 available after May 21. | — |
| Marigolds | Apr 9 | May 21–May 28 | 119 | two-plantings: Plant May 21 and again by Jul 15; both mature before Sep 17. | Jul 15 |
| Melons | May 7 | Jun 4–Jun 11 | 91 | fits: 85 days to maturity, 91 available after Jun 4. | — |
| Mint | — | May 21–Jun 4 | 154 | fits: 90 days to maturity, 154 available after May 21. | — |
| Nasturtiums | Apr 23 | May 21–May 28 | 119 | fits: 55 days to maturity, 119 available after May 21. | Jul 10 |
| Pole Beans | — | May 28–Jun 11 | 112 | fits: 65 days to maturity, 112 available after May 28. | Jun 30 |
| Spaghetti Squash | May 7 | Jun 4–Jun 11 | 98 | fits: 90 days to maturity, 98 available after Jun 4. | — |
| Sunflowers | — | May 21–Jun 4 | 119 | fits: 70 days to maturity, 119 available after May 21. | Jun 25 |
| Tomatillos | Mar 26 | May 28–Jun 4 | 98 | fits: 75 days to maturity, 98 available after May 28. | Jun 6 |
| Watermelon | May 7 | May 28–Jun 4 | 98 | fits: 80 days to maturity, 98 available after May 28. | Jun 1 |
| Yellow Squash | May 7 | Jun 4–Jun 11 | 105 | fits: 55 days to maturity, 105 available after Jun 4. | Jul 10 |
| Zinnias | Apr 23 | May 21–Jun 4 | 119 | fits: 60 days to maturity, 119 available after May 21. | Jul 5 |
Month by month in Cedar 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 26), Lavender (Feb 26), Onion (Feb 26), Rosemary (Feb 26). |
| March | Start indoors: Celery (Mar 12), Collards (Mar 12), Kale (Mar 12), Oregano (Mar 12), Parsley (Mar 12), Scallions (Mar 12), +8 more. Direct sow from: Arugula (Mar 26), Beets (Mar 26), Dill (Mar 26), Peas (Mar 26), Radish (Mar 26), Spinach (Mar 26). |
| April | Start indoors: Eggplant (Apr 2), Calendula (Apr 9), Cauliflower (Apr 9), Marigolds (Apr 9), Pepper (Apr 9), Basil (Apr 16), +8 more. Direct sow from: Kohlrabi (Apr 9), Cilantro (Apr 23), Turnip (Apr 23), Carrots (Apr 30). Transplant from: Broccoli (Apr 23), Brussel Sprouts (Apr 23), Cabbage (Apr 23), Collards (Apr 23), Kale (Apr 23), Lettuce (Apr 23), +2 more. Plant: Strawberry (Apr 16). |
| May | Start indoors: Butternut Squash (May 7), Cantaloupe (May 7), Melons (May 7), Pumpkin (May 7), Spaghetti Squash (May 7), Watermelon (May 7), +2 more. Direct sow from: Potatoes (May 7), Sunflowers (May 21), Beans (May 28), Pole Beans (May 28). Transplant from: Calendula (May 7), Swiss Chard (May 7), Bok Choy (May 14), Cauliflower (May 14), Cosmos (May 21), Lavender (May 21), +15 more. Last frost around May 21. |
| June | Transplant from: Butternut Squash (Jun 4), Cantaloupe (Jun 4), Cucumber (Jun 4), Eggplant (Jun 4), Melons (Jun 4), Pepper (Jun 4), +6 more. Last sowing dates: Watermelon (Jun 1), Pepper (Jun 6), Tomatillos (Jun 6), Eggplant (Jun 11), Corn (Jun 13), Sunflowers (Jun 25), +2 more. |
| July | Last sowing dates: Basil (Jul 5), Cosmos (Jul 5), Cucumber (Jul 5), Zinnias (Jul 5), Broccoli (Jul 6), Nasturtiums (Jul 10), +13 more. |
| August | Last sowing dates: Calendula (Aug 5), Cilantro (Aug 5), Collards (Aug 9), Scallions (Aug 9), Bok Choy (Aug 10), Lettuce (Aug 10), +6 more. |
| September | First fall frost approaching (around October 1). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| October | Direct sow from: Garlic (Oct 1). First frost around October 1. Last sowing dates: Garlic (Oct 22). |
| November | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
| 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 Cedar City, UT (ZIP 84721)?
The median last spring frost date for Cedar City, UT (ZIP code 84721) is around May 21. 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 May 4; one in ten it runs past June 7.
What is the first fall frost date in Cedar City, UT?
The median first fall frost date for Cedar City, UT is around October 1. 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 15 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Cedar City, UT?
The frost-free growing season in Cedar City is about 133 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 Cedar City (133 frost-free days, a moderate season), 37 of 56 planner crops fit outright, 16 get two plantings, 2 need an indoor start, 1 crop is perennial.
What USDA hardiness zone is Cedar City, UT?
Cedar City, UT is in USDA hardiness zone 6b (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 Cedar City, UT?
Start tomatoes indoors Apr 16 and plant out Jun 4 in Cedar 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 Cedar City?
Two: plant Apr 23 and again by Aug 10; both mature before Oct 8.
When do I plant garlic in Cedar City?
Oct 1 to Oct 22; it overwinters and is ready the following summer.
Can I grow Butternut Squash in Cedar City?
Yes, with help. Even planted out Jun 4, the outdoor season is about 2 days short; choose an early variety or grow under cover.
Which nearby ZIP has a longer season?
Hurricane (ZIP 84737) has 210 frost-free days, 77 more than Cedar City (ZIP 84721). See Hurricane ZIP 84737 frost dates
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