Frost Dates for Roosevelt, UT 84066
Last spring frost May 20 · First fall frost September 27 · 130 frost-free days · USDA Zone 5b
ZIP 84066 has about 15,200 people.
Moderate season: 130 frost-free days. Spring frost risk spans May 4–June 7 (34 days). Fall frost risk spans September 12–October 9 (27 days).
Frost probability for 84066
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 7 | May 20 | May 4 |
| Fall (first frost) | September 12 | September 27 | October 9 |
Dates come from NOAA 1971–2000 freeze probabilities at MYTON (17.0 km away); the 50% date is the median year.
Which crops fit a 130-day season in Roosevelt
In Roosevelt (130 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 15 | Jun 3–Jun 10 | 88 | fits: 80 days to maturity, 88 available after Jun 3. | — |
| Pepper | Apr 8 | Jun 3–Jun 10 | 88 | fits: 75 days to maturity, 88 available after Jun 3. | — |
| Lettuce | Mar 25 | Apr 22–Apr 29 | 165 | two-plantings: Plant Apr 22 and again by Aug 6; both mature before Oct 4. | Aug 6 |
| Carrots | — | Apr 29–May 6 | 172 | fits: 70 days to maturity, 172 available after Apr 29. | Jul 26 |
| Cucumber | Apr 29 | Jun 3–Jun 10 | 102 | fits: 60 days to maturity, 102 available after Jun 3. | Jul 1 |
| Beans | — | May 27–Jun 10 | 116 | fits: 60 days to maturity, 116 available after May 27. | Jul 8 |
| Peas | — | Mar 25–Jun 3 | 193 | fits: 65 days to maturity, 193 available after Mar 25. | Jul 17 |
| Zucchini | May 6 | Jun 3–Jun 10 | 102 | fits: 55 days to maturity, 102 available after Jun 3. | Jul 6 |
| Onion | Feb 25 | Apr 22–May 6 | 165 | fits: 100 days to maturity, 165 available after Apr 22. | — |
| Spinach | — | Mar 25–May 13 | 207 | two-plantings: Plant Mar 25 and again by Aug 25; both mature before Oct 18. | Aug 25 |
| Kale | Mar 11 | Apr 22–May 6 | 179 | two-plantings: Plant Apr 22 and again by Aug 10; both mature before Oct 18. | Aug 10 |
| Broccoli | Mar 25 | Apr 22–May 6 | 165 | fits: 80 days to maturity, 165 available after Apr 22. | Jul 2 |
| Cabbage | Mar 25 | Apr 22–May 6 | 179 | fits: 70 days to maturity, 179 available after Apr 22. | Jul 26 |
| Radish | — | Mar 25–Jun 17 | 193 | two-plantings: Plant Mar 25 and again by Aug 26; both mature before Oct 4. | Aug 26 |
| Beets | — | Mar 25–Jun 17 | 193 | two-plantings: Plant Mar 25 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Potatoes | — | May 6–May 13 | 151 | fits: 90 days to maturity, 151 available after May 6. | — |
| Garlic | — | Sep 27 | 235 | overwinter: Plant Sep 27 to Oct 18; harvest the following summer. | Oct 18 |
| Strawberry | — | Apr 15–Jun 10 | 186 | perennial: A perennial: plant Apr 15; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 22 | May 27–Jun 3 | 102 | fits: 75 days to maturity, 102 available after May 27. | Jun 9 |
| Pumpkin | May 6 | Jun 3–Jun 3 | 95 | head-start: Even planted out Jun 3, the outdoor season is about 5 days short; choose an early variety or grow under cover. | — |
| Cauliflower | Apr 8 | May 13–May 27 | 144 | fits: 75 days to maturity, 144 available after May 13. | Jul 7 |
| Swiss Chard | Mar 25 | May 6–May 6 | 151 | two-plantings: Plant May 6 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Arugula | — | Mar 25–Jun 17 | 207 | two-plantings: Plant Mar 25 and again by Aug 25; both mature before Oct 18. | Aug 25 |
| Brussel Sprouts | Mar 25 | Apr 22–May 6 | 179 | fits: 100 days to maturity, 179 available after Apr 22. | Jun 26 |
| Butternut Squash | May 6 | Jun 3–Jun 10 | 95 | head-start: Even planted out Jun 3, the outdoor season is about 5 days short; choose an early variety or grow under cover. | — |
| Eggplant | Apr 1 | Jun 3–Jun 10 | 88 | fits: 70 days to maturity, 88 available after Jun 3. | Jun 7 |
| Okra | Apr 22 | May 27–Jun 3 | 109 | fits: 55 days to maturity, 109 available after May 27. | Jul 6 |
| Basil | Apr 15 | Jun 10–Jun 10 | 95 | fits: 60 days to maturity, 95 available after Jun 10. | Jul 1 |
| Cilantro | — | Apr 22–May 13 | 165 | two-plantings: Plant Apr 22 and again by Aug 1; both mature before Oct 4. | Aug 1 |
| Parsley | Mar 11 | May 27–Jun 3 | 130 | fits: 70 days to maturity, 130 available after May 27. | Jul 12 |
| Celery | Mar 11 | May 27–Jun 10 | 130 | fits: 120 days to maturity, 130 available after May 27. | — |
| Scallions | Mar 11 | Apr 22–May 6 | 179 | two-plantings: Plant Apr 22 and again by Aug 5; both mature before Oct 18. | Aug 5 |
| Turnip | — | Apr 22–May 6 | 179 | two-plantings: Plant Apr 22 and again by Aug 15; both mature before Oct 18. | Aug 15 |
| Kohlrabi | — | Apr 8–Apr 22 | 193 | two-plantings: Plant Apr 8 and again by Aug 10; both mature before Oct 18. | Aug 10 |
| Bok Choy | Apr 22 | May 13–May 20 | 144 | two-plantings: Plant May 13 and again by Aug 6; both mature before Oct 4. | Aug 6 |
| Collards | Mar 11 | Apr 22–May 6 | 179 | two-plantings: Plant Apr 22 and again by Aug 5; both mature before Oct 18. | Aug 5 |
| Cantaloupe | May 6 | Jun 3–Jun 10 | 88 | fits: 85 days to maturity, 88 available after Jun 3. | — |
| Chives | Feb 25 | May 27–Jun 3 | 144 | fits: 90 days to maturity, 144 available after May 27. | — |
| Dill | — | Mar 25–Jun 17 | 193 | two-plantings: Plant Mar 25 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Oregano | Mar 11 | May 27–Jun 3 | 144 | fits: 80 days to maturity, 144 available after May 27. | — |
| Rosemary | Feb 25 | May 27–Jun 3 | 130 | fits: 80 days to maturity, 130 available after May 27. | — |
| Sage | Mar 25 | May 27–Jun 3 | 144 | fits: 75 days to maturity, 144 available after May 27. | — |
| Thyme | Mar 11 | May 27–Jun 3 | 144 | fits: 90 days to maturity, 144 available after May 27. | — |
| Calendula | Apr 8 | May 6–May 20 | 151 | two-plantings: Plant May 6 and again by Aug 1; both mature before Oct 4. | Aug 1 |
| Cosmos | Apr 22 | May 20–Jun 3 | 116 | fits: 60 days to maturity, 116 available after May 20. | Jul 1 |
| Lavender | Feb 25 | May 20–Jun 3 | 151 | fits: 90 days to maturity, 151 available after May 20. | — |
| Marigolds | Apr 8 | May 20–May 27 | 116 | two-plantings: Plant May 20 and again by Jul 11; both mature before Sep 13. | Jul 11 |
| Melons | May 6 | Jun 3–Jun 10 | 88 | fits: 85 days to maturity, 88 available after Jun 3. | — |
| Mint | — | May 20–Jun 3 | 151 | fits: 90 days to maturity, 151 available after May 20. | — |
| Nasturtiums | Apr 22 | May 20–May 27 | 116 | fits: 55 days to maturity, 116 available after May 20. | Jul 6 |
| Pole Beans | — | May 27–Jun 10 | 109 | fits: 65 days to maturity, 109 available after May 27. | Jun 26 |
| Spaghetti Squash | May 6 | Jun 3–Jun 10 | 95 | fits: 90 days to maturity, 95 available after Jun 3. | — |
| Sunflowers | — | May 20–Jun 3 | 116 | fits: 70 days to maturity, 116 available after May 20. | Jun 21 |
| Tomatillos | Mar 25 | May 27–Jun 3 | 95 | fits: 75 days to maturity, 95 available after May 27. | Jun 2 |
| Watermelon | May 6 | May 27–Jun 3 | 95 | fits: 80 days to maturity, 95 available after May 27. | May 28 |
| Yellow Squash | May 6 | Jun 3–Jun 10 | 102 | fits: 55 days to maturity, 102 available after Jun 3. | Jul 6 |
| Zinnias | Apr 22 | May 20–Jun 3 | 116 | fits: 60 days to maturity, 116 available after May 20. | Jul 1 |
Month by month in Roosevelt
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 25), Lavender (Feb 25), Onion (Feb 25), Rosemary (Feb 25). |
| March | Start indoors: Celery (Mar 11), Collards (Mar 11), Kale (Mar 11), Oregano (Mar 11), Parsley (Mar 11), Scallions (Mar 11), +8 more. Direct sow from: Arugula (Mar 25), Beets (Mar 25), Dill (Mar 25), Peas (Mar 25), Radish (Mar 25), Spinach (Mar 25). |
| April | Start indoors: Eggplant (Apr 1), Calendula (Apr 8), Cauliflower (Apr 8), Marigolds (Apr 8), Pepper (Apr 8), Basil (Apr 15), +8 more. Direct sow from: Kohlrabi (Apr 8), Cilantro (Apr 22), Turnip (Apr 22), Carrots (Apr 29). Transplant from: Broccoli (Apr 22), Brussel Sprouts (Apr 22), Cabbage (Apr 22), Collards (Apr 22), Kale (Apr 22), Lettuce (Apr 22), +2 more. Plant: Strawberry (Apr 15). |
| May | Start indoors: Butternut Squash (May 6), Cantaloupe (May 6), Melons (May 6), Pumpkin (May 6), Spaghetti Squash (May 6), Watermelon (May 6), +2 more. Direct sow from: Potatoes (May 6), Sunflowers (May 20), Beans (May 27), Pole Beans (May 27). Transplant from: Calendula (May 6), Swiss Chard (May 6), Bok Choy (May 13), Cauliflower (May 13), Cosmos (May 20), Lavender (May 20), +15 more. Last frost around May 20. Last sowing dates: Watermelon (May 28). |
| June | Transplant from: Butternut Squash (Jun 3), Cantaloupe (Jun 3), Cucumber (Jun 3), Eggplant (Jun 3), Melons (Jun 3), Pepper (Jun 3), +6 more. Last sowing dates: Tomatillos (Jun 2), Eggplant (Jun 7), Corn (Jun 9), Sunflowers (Jun 21), Brussel Sprouts (Jun 26), Pole Beans (Jun 26). |
| July | Last sowing dates: Basil (Jul 1), Cosmos (Jul 1), Cucumber (Jul 1), Zinnias (Jul 1), Broccoli (Jul 2), Nasturtiums (Jul 6), +13 more. |
| August | Last sowing dates: Calendula (Aug 1), Cilantro (Aug 1), Collards (Aug 5), Scallions (Aug 5), Bok Choy (Aug 6), Lettuce (Aug 6), +6 more. |
| September | Direct sow from: Garlic (Sep 27). First frost around September 27. |
| October | Last sowing dates: Garlic (Oct 18). |
| November | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
| 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 Roosevelt, UT (ZIP 84066)?
The median last spring frost date for Roosevelt, UT (ZIP code 84066) is around May 20. 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 Roosevelt, UT?
The median first fall frost date for Roosevelt, UT is around September 27. 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 12 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Roosevelt, UT?
The frost-free growing season in Roosevelt is about 130 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 Roosevelt (130 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 Roosevelt, UT?
Roosevelt, UT is in USDA hardiness zone 5b (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 Roosevelt, UT?
Start tomatoes indoors Apr 15 and plant out Jun 3 in Roosevelt. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Roosevelt?
Two: plant Apr 22 and again by Aug 6; both mature before Oct 4.
When do I plant garlic in Roosevelt?
Sep 27 to Oct 18; it overwinters and is ready the following summer.
Can I grow Butternut Squash in Roosevelt?
Yes, with help. Even planted out Jun 3, the outdoor season is about 5 days short; choose an early variety or grow under cover.
Which nearby ZIP has a longer season?
Spanish Fork (ZIP 84660) has 142 frost-free days, 12 more than Roosevelt (ZIP 84066). See Spanish Fork ZIP 84660 frost dates
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