Frost Dates for Spanish Fork, UT 84660
Last spring frost May 16 · First fall frost October 5 · 142 frost-free days · USDA Zone 6a
ZIP 84660 has about 48,600 people.
Moderate season: 142 frost-free days. Spring frost risk spans April 24–June 7 (44 days). Fall frost risk spans September 18–October 22 (34 days).
Frost probability for 84660
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 7 | May 16 | April 24 |
| Fall (first frost) | September 18 | October 5 | October 22 |
Dates come from NOAA 1971–2000 freeze probabilities at SANTAQUIN CHLORINATOR (30.5 km away); the 50% date is the median year.
Which crops fit a 142-day season in Spanish Fork
In Spanish Fork (142 frost-free days, a moderate season), 38 of 56 planner crops fit outright, 17 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 11 | May 30–Jun 6 | 100 | fits: 80 days to maturity, 100 available after May 30. | Jun 5 |
| Pepper | Apr 4 | May 30–Jun 6 | 100 | fits: 75 days to maturity, 100 available after May 30. | Jun 10 |
| Lettuce | Mar 21 | Apr 18–Apr 25 | 177 | two-plantings: Plant Apr 18 and again by Aug 14; both mature before Oct 12. | Aug 14 |
| Carrots | — | Apr 25–May 2 | 184 | fits: 70 days to maturity, 184 available after Apr 25. | Aug 3 |
| Cucumber | Apr 25 | May 30–Jun 6 | 114 | fits: 60 days to maturity, 114 available after May 30. | Jul 9 |
| Beans | — | May 23–Jun 6 | 128 | fits: 60 days to maturity, 128 available after May 23. | Jul 16 |
| Peas | — | Mar 21–May 30 | 205 | fits: 65 days to maturity, 205 available after Mar 21. | Jul 25 |
| Zucchini | May 2 | May 30–Jun 6 | 114 | fits: 55 days to maturity, 114 available after May 30. | Jul 14 |
| Onion | Feb 21 | Apr 18–May 2 | 177 | fits: 100 days to maturity, 177 available after Apr 18. | — |
| Spinach | — | Mar 21–May 9 | 219 | two-plantings: Plant Mar 21 and again by Sep 2; both mature before Oct 26. | Sep 2 |
| Kale | Mar 7 | Apr 18–May 2 | 191 | two-plantings: Plant Apr 18 and again by Aug 18; both mature before Oct 26. | Aug 18 |
| Broccoli | Mar 21 | Apr 18–May 2 | 177 | fits: 80 days to maturity, 177 available after Apr 18. | Jul 10 |
| Cabbage | Mar 21 | Apr 18–May 2 | 191 | fits: 70 days to maturity, 191 available after Apr 18. | Aug 3 |
| Radish | — | Mar 21–Jun 13 | 205 | two-plantings: Plant Mar 21 and again by Sep 3; both mature before Oct 12. | Sep 3 |
| Beets | — | Mar 21–Jun 13 | 205 | two-plantings: Plant Mar 21 and again by Aug 4; both mature before Oct 12. | Aug 4 |
| Potatoes | — | May 2–May 9 | 163 | fits: 90 days to maturity, 163 available after May 2. | — |
| Garlic | — | Oct 5 | 247 | overwinter: Plant Oct 5 to Oct 26; harvest the following summer. | Oct 26 |
| Strawberry | — | Apr 11–Jun 6 | 198 | perennial: A perennial: plant Apr 11; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 18 | May 23–May 30 | 114 | fits: 75 days to maturity, 114 available after May 23. | Jun 17 |
| Pumpkin | May 2 | May 30–May 30 | 107 | fits: 100 days to maturity, 107 available after May 30. | — |
| Cauliflower | Apr 4 | May 9–May 23 | 156 | fits: 75 days to maturity, 156 available after May 9. | Jul 15 |
| Swiss Chard | Mar 21 | May 2–May 2 | 163 | two-plantings: Plant May 2 and again by Aug 4; both mature before Oct 12. | Aug 4 |
| Arugula | — | Mar 21–Jun 13 | 219 | two-plantings: Plant Mar 21 and again by Sep 2; both mature before Oct 26. | Sep 2 |
| Brussel Sprouts | Mar 21 | Apr 18–May 2 | 191 | fits: 100 days to maturity, 191 available after Apr 18. | Jul 4 |
| Butternut Squash | May 2 | May 30–Jun 6 | 107 | fits: 100 days to maturity, 107 available after May 30. | — |
| Eggplant | Mar 28 | May 30–Jun 6 | 100 | fits: 70 days to maturity, 100 available after May 30. | Jun 15 |
| Okra | Apr 18 | May 23–May 30 | 121 | fits: 55 days to maturity, 121 available after May 23. | Jul 14 |
| Basil | Apr 11 | Jun 6–Jun 6 | 107 | fits: 60 days to maturity, 107 available after Jun 6. | Jul 9 |
| Cilantro | — | Apr 18–May 9 | 177 | two-plantings: Plant Apr 18 and again by Aug 9; both mature before Oct 12. | Aug 9 |
| Parsley | Mar 7 | May 23–May 30 | 142 | fits: 70 days to maturity, 142 available after May 23. | Jul 20 |
| Celery | Mar 7 | May 23–Jun 6 | 142 | fits: 120 days to maturity, 142 available after May 23. | May 31 |
| Scallions | Mar 7 | Apr 18–May 2 | 191 | two-plantings: Plant Apr 18 and again by Aug 13; both mature before Oct 26. | Aug 13 |
| Turnip | — | Apr 18–May 2 | 191 | two-plantings: Plant Apr 18 and again by Aug 23; both mature before Oct 26. | Aug 23 |
| Kohlrabi | — | Apr 4–Apr 18 | 205 | two-plantings: Plant Apr 4 and again by Aug 18; both mature before Oct 26. | Aug 18 |
| Bok Choy | Apr 18 | May 9–May 16 | 156 | two-plantings: Plant May 9 and again by Aug 14; both mature before Oct 12. | Aug 14 |
| Collards | Mar 7 | Apr 18–May 2 | 191 | two-plantings: Plant Apr 18 and again by Aug 13; both mature before Oct 26. | Aug 13 |
| Cantaloupe | May 2 | May 30–Jun 6 | 100 | fits: 85 days to maturity, 100 available after May 30. | May 31 |
| Chives | Feb 21 | May 23–May 30 | 156 | fits: 90 days to maturity, 156 available after May 23. | — |
| Dill | — | Mar 21–Jun 13 | 205 | two-plantings: Plant Mar 21 and again by Aug 4; both mature before Oct 12. | Aug 4 |
| Oregano | Mar 7 | May 23–May 30 | 156 | fits: 80 days to maturity, 156 available after May 23. | — |
| Rosemary | Feb 21 | May 23–May 30 | 142 | fits: 80 days to maturity, 142 available after May 23. | — |
| Sage | Mar 21 | May 23–May 30 | 156 | fits: 75 days to maturity, 156 available after May 23. | — |
| Thyme | Mar 7 | May 23–May 30 | 156 | fits: 90 days to maturity, 156 available after May 23. | — |
| Calendula | Apr 4 | May 2–May 16 | 163 | two-plantings: Plant May 2 and again by Aug 9; both mature before Oct 12. | Aug 9 |
| Cosmos | Apr 18 | May 16–May 30 | 128 | fits: 60 days to maturity, 128 available after May 16. | Jul 9 |
| Lavender | Feb 21 | May 16–May 30 | 163 | fits: 90 days to maturity, 163 available after May 16. | — |
| Marigolds | Apr 4 | May 16–May 23 | 128 | two-plantings: Plant May 16 and again by Jul 19; both mature before Sep 21. | Jul 19 |
| Melons | May 2 | May 30–Jun 6 | 100 | fits: 85 days to maturity, 100 available after May 30. | May 31 |
| Mint | — | May 16–May 30 | 163 | fits: 90 days to maturity, 163 available after May 16. | — |
| Nasturtiums | Apr 18 | May 16–May 23 | 128 | two-plantings: Plant May 16 and again by Jul 14; both mature before Sep 21. | Jul 14 |
| Pole Beans | — | May 23–Jun 6 | 121 | fits: 65 days to maturity, 121 available after May 23. | Jul 4 |
| Spaghetti Squash | May 2 | May 30–Jun 6 | 107 | fits: 90 days to maturity, 107 available after May 30. | Jun 2 |
| Sunflowers | — | May 16–May 30 | 128 | fits: 70 days to maturity, 128 available after May 16. | Jun 29 |
| Tomatillos | Mar 21 | May 23–May 30 | 107 | fits: 75 days to maturity, 107 available after May 23. | Jun 10 |
| Watermelon | May 2 | May 23–May 30 | 107 | fits: 80 days to maturity, 107 available after May 23. | Jun 5 |
| Yellow Squash | May 2 | May 30–Jun 6 | 114 | fits: 55 days to maturity, 114 available after May 30. | Jul 14 |
| Zinnias | Apr 18 | May 16–May 30 | 128 | fits: 60 days to maturity, 128 available after May 16. | Jul 9 |
Month by month in Spanish Fork
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 21), Lavender (Feb 21), Onion (Feb 21), Rosemary (Feb 21). |
| March | Start indoors: Celery (Mar 7), Collards (Mar 7), Kale (Mar 7), Oregano (Mar 7), Parsley (Mar 7), Scallions (Mar 7), +9 more. Direct sow from: Arugula (Mar 21), Beets (Mar 21), Dill (Mar 21), Peas (Mar 21), Radish (Mar 21), Spinach (Mar 21). |
| April | Start indoors: Calendula (Apr 4), Cauliflower (Apr 4), Marigolds (Apr 4), Pepper (Apr 4), Basil (Apr 11), Tomato (Apr 11), +7 more. Direct sow from: Kohlrabi (Apr 4), Cilantro (Apr 18), Turnip (Apr 18), Carrots (Apr 25). Transplant from: Broccoli (Apr 18), Brussel Sprouts (Apr 18), Cabbage (Apr 18), Collards (Apr 18), Kale (Apr 18), Lettuce (Apr 18), +2 more. Plant: Strawberry (Apr 11). |
| May | Start indoors: Butternut Squash (May 2), Cantaloupe (May 2), Melons (May 2), Pumpkin (May 2), Spaghetti Squash (May 2), Watermelon (May 2), +2 more. Direct sow from: Potatoes (May 2), Sunflowers (May 16), Beans (May 23), Pole Beans (May 23). Transplant from: Calendula (May 2), Swiss Chard (May 2), Bok Choy (May 9), Cauliflower (May 9), Cosmos (May 16), Lavender (May 16), +26 more. Last frost around May 16. Last sowing dates: Cantaloupe (May 31), Celery (May 31), Melons (May 31). |
| June | Transplant from: Basil (Jun 6). Last sowing dates: Spaghetti Squash (Jun 2), Tomato (Jun 5), Watermelon (Jun 5), Pepper (Jun 10), Tomatillos (Jun 10), Eggplant (Jun 15), +2 more. |
| July | Last sowing dates: Brussel Sprouts (Jul 4), Pole Beans (Jul 4), Basil (Jul 9), Cosmos (Jul 9), Cucumber (Jul 9), Zinnias (Jul 9), +10 more. |
| August | Last sowing dates: Cabbage (Aug 3), Carrots (Aug 3), Beets (Aug 4), Dill (Aug 4), Swiss Chard (Aug 4), Calendula (Aug 9), +8 more. |
| September | Last sowing dates: Arugula (Sep 2), Spinach (Sep 2), Radish (Sep 3). |
| October | Direct sow from: Garlic (Oct 5). First frost around October 5. Last sowing dates: Garlic (Oct 26). |
| 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 Spanish Fork, UT (ZIP 84660)?
The median last spring frost date for Spanish Fork, UT (ZIP code 84660) is around May 16. 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 24; one in ten it runs past June 7.
What is the first fall frost date in Spanish Fork, UT?
The median first fall frost date for Spanish Fork, UT is around October 5. 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 18 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Spanish Fork, UT?
The frost-free growing season in Spanish Fork is about 142 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 Spanish Fork (142 frost-free days, a moderate season), 38 of 56 planner crops fit outright, 17 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Spanish Fork, UT?
Spanish Fork, UT is in USDA hardiness zone 6a (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 Spanish Fork, UT?
Start tomatoes indoors Apr 11 and plant out May 30 in Spanish Fork. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Spanish Fork?
Two: plant Apr 18 and again by Aug 14; both mature before Oct 12.
When do I plant garlic in Spanish Fork?
Oct 5 to Oct 26; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
Salem (ZIP 84653) has 166 frost-free days, 24 more than Spanish Fork (ZIP 84660). See Salem ZIP 84653 frost dates
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