Lehi, Utah planting calendar and frost dates
Lehi is in USDA hardiness zone 7a. The last spring frost typically comes around April 17 and the first fall frost around October 25, giving about 188 frost-free days a year.
- Typical last frost
- April 17
- Typical first frost
- October 25
- Frost-free season
- 188 days
Frost dates in Lehi
Last spring frost
- March 30Risky: frost later than this in 9 years out of 10
- April 17Typical: a later frost in half of years
- May 7Safe: a later frost only 1 year in 10
First fall frost
- October 10Risky: frost earlier than this 1 year in 10
- October 25Typical: an earlier frost in half of years
- November 8Late: frost before this in 9 years out of 10
The growing season between the typical last and first frosts is about 188 days. Frost here means a low of 32°F at the weather station. A hard freeze (28°F), which damages most hardy crops too, typically ends around March 30 and returns around November 5.
NOAA U.S. Climate Normals 1991-2020 for Pleasant Grove, 8 miles ESE of the city center and 142 feet higher. Low-lying and rural spots often frost later in spring and earlier in fall than airports and city centers.
What to plant each month in Lehi
January
Start indoors: broccoli, cauliflower, collard greens, kale, leeks, onions, petunias, ranunculus
February
Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, chives, collard greens, ginger, kale, leeks, lettuce, marigolds, onions, oregano, parsley, peppers, petunias, ranunculus, rosemary, sage, snapdragons
March
Start indoors: basil, black-eyed susans, cabbages, celery, chives, cilantro, collard greens, eggplants, ginger, lettuce, marigolds, nasturtiums, peppers, ranunculus, sage, snapdragons, spinach, swiss chard, tomatoes
Plant or sow outdoors: beets, black-eyed susans, blackberries, blueberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, figs, garlic, gladioli, grapes, grass seed, hollyhocks, kale, leeks, lettuce, onions, parsley, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, spinach, strawberries, swiss chard, turnips, wildflowers
April
Start indoors: basil, cantaloupes, cosmos, cucumbers, okra, pumpkins, ranunculus, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, beets, black-eyed susans, blackberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, dahlias, dill, figs, garden mums, ginger, gladioli, grapes, green onions, kentucky bluegrass, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, onions, oregano, parsley, perennial ryegrass, petunias, potatoes, radishes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, sweet peas, swiss chard, tall fescue, thyme, turnips
May
Start indoors: cosmos, okra, zinnias
Plant or sow outdoors: asparagus, basil, bermudagrass, cantaloupes, celery, centipedegrass, cosmos, cucumbers, eggplants, garden mums, ginger, grapes, green beans, green onions, kentucky bluegrass, lavenders, lilies, marigolds, mints, nasturtiums, okra, oregano, parsley, peanuts, peppers, perennial ryegrass, petunias, pumpkins, rosemary, sage, st. augustinegrass, sunflowers, sweet corn, sweet peas, sweet potatoes, tall fescue, thyme, tomatoes, watermelons, winter squash, zoysiagrass, zucchini
June
Plant or sow outdoors: bermudagrass, celery, centipedegrass, cosmos, green onions, okra, peanuts, st. augustinegrass, sweet potatoes, zinnias, zoysiagrass
July
Plant or sow outdoors: bermudagrass, centipedegrass, zoysiagrass
Plant for fall: brussels sprouts, collard greens, lettuce, swiss chard
August
Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, carrots, cauliflower, clematis, collard greens, coneflowers, daylilies, hostas, hydrangeas, kale, lettuce, peas, radishes, roses, saffron, snapdragons, spinach, swiss chard, turnips
September
Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, hydrangeas, kale, kentucky bluegrass, lilies, ornamental alliums, peonies, perennial ryegrass, radishes, roses, saffron, spinach, tall fescue, tulips, turnips
October
Plant for fall: crocuses, daffodils, daylilies, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips
November
Plant for fall: crocuses, garlic, hyacinths, ornamental alliums, tulips
December
Start indoors: onions
Frost dates and zones by ZIP code in Lehi
Lehi's 2 main ZIP codes take their frost dates from 2 different NOAA stations: the typical last frost ranges from April 17 in 84043 to June 11 in 84003. The hardiness zone is 6a in 84003, and 7a in 84043.
| ZIP code | Zone | Weather station | Typical last frost | Typical first frost |
|---|---|---|---|---|
| 84003 | 6a | Alta, 8.5 mi NNE | Jun 11 | Sep 18 |
| 84043 | 7a | Pleasant Grove, 8 mi ESE | Apr 17 | Oct 25 |
Pleasant Grove also supplies the frost dates for Orem, so their planting calendars match Lehi's.
Planting dates for popular crops in Lehi
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Mar 17 to 31 | May 12 to 26 | — |
| Strawberries | — | Mar 6 to 20 | — |
| Lettuce | Feb 20 to Mar 6 | Apr 10 to 24 | Jul 26 to Aug 30 |
| Cilantro | Mar 6 to 20 | Apr 17 to 24 | — |
| Basil | Mar 24 to Apr 7 | May 12 to 19 | — |
| Potatoes | — | Apr 5 to 12 | — |
| Garlic | — | Mar 6 to 20 | Oct 25 to Nov 8 |
| Onions | Dec 26 to Feb 6 | Mar 20 to Apr 3 | — |
| Cucumbers | Apr 14 to 28 | May 12 to 26 | — |
| Pumpkins | Apr 14 to 28 | May 12 to 26 | — |
| Peppers | Feb 24 to Mar 24 | May 12 to 26 | — |
| Carrots | — | Mar 27 to Apr 17 | Aug 2 to 23 |
| Sweet Potatoes | — | May 29 to Jun 5 | — |
| Watermelons | Apr 7 to 21 | May 12 to 26 | — |
| Sweet Corn | — | Apr 17 to May 1 | — |
| Green Beans | — | May 12 to 26 | — |
| Zucchini | Apr 14 to 28 | May 12 to 26 | — |
| Broccoli | Jan 30 to Feb 20 | Mar 20 to Apr 3 | Aug 9 to Sep 6 |
| Peas | — | Mar 6 to 20 | Aug 2 to 16 |
| Spinach | Mar 6 to 13 | Apr 10 to 24 | Aug 16 to Sep 20 |
| Sunflowers | — | Apr 17 to May 8 | — |
| Zinnias | May 18 to 25 | Jun 15 to 29 | — |
| Tulips | — | — | Sep 13 to Nov 8 |
| Daffodils | — | — | Sep 13 to Oct 25 |
| Grass Seed | — | Mar 6 to 20 | Sep 13 to 27 |
Nearby cities
- Saratoga Springs, UT zone 7a, last frost May 2
- Draper, UT zone 7a, last frost Apr 18
- Herriman, UT zone 7a, last frost May 2
- Eagle Mountain, UT zone 6b, last frost Jun 2
- Sandy, UT zone 6b, last frost Jun 11
- South Jordan, UT zone 7a, last frost Apr 18
Planting in UtahAbout zone 7aPrintable calendar for Lehi
Questions
When is the last frost in Lehi?
Around April 17 in a typical year, based on NOAA's 1991-2020 records for Pleasant Grove. There is still a 1 in 10 chance of frost after May 7.
What planting zone is Lehi in?
USDA hardiness zone 7a (2023 map), with parts of the city in zone 6a. The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.
When should I plant tomatoes in Lehi?
Start seeds indoors March 17 to 31 and set plants out May 12 to 26.
When is the first frost in Lehi?
Around October 25 in a typical year, and before October 10 about 1 year in 10.