Herriman, Utah planting calendar and frost dates
Herriman is in USDA hardiness zone 7a. The last spring frost typically comes around May 2 and the first fall frost around October 16, giving about 161 frost-free days a year.
- Hardiness zone
- Zone 7a
- Typical last frost
- May 2
- Typical first frost
- October 16
- Frost-free season
- 161 days
Frost dates in Herriman
Last spring frost
- April 17Risky: frost later than this in 9 years out of 10
- May 2Typical: a later frost in half of years
- May 26Safe: a later frost only 1 year in 10
First fall frost
- October 1Risky: frost earlier than this 1 year in 10
- October 16Typical: an earlier frost in half of years
- October 31Late: frost before this in 9 years out of 10
The growing season between the typical last and first frosts is about 161 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 April 16 and returns around October 26.
NOAA U.S. Climate Normals 1991-2020 for Timpanogos Cave, 20.8 miles E of the city center and 310 feet lower. 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 Herriman
January
Start indoors: onions
February
Start indoors: broccoli, cabbages, cauliflower, collard greens, kale, leeks, onions, oregano, parsley, petunias, ranunculus, rosemary, snapdragons
March
Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, celery, chives, cilantro, collard greens, eggplants, ginger, leeks, lettuce, marigolds, nasturtiums, oregano, parsley, peppers, petunias, ranunculus, rosemary, sage, snapdragons, spinach, swiss chard
Plant or sow outdoors: black-eyed susans, blueberries, garlic, grapes, grass seed, hollyhocks, kale, onions, peas, poppies, raspberries, rhubarb, strawberries, turnips, wildflowers
April
Start indoors: basil, cantaloupes, celery, cilantro, eggplants, marigolds, nasturtiums, peppers, ranunculus, tomatoes, watermelons
Plant or sow outdoors: beets, black-eyed susans, blackberries, blueberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, dahlias, dill, figs, garlic, gladioli, grapes, grass seed, hollyhocks, kale, leeks, lettuce, onions, parsley, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, snapdragons, spinach, strawberries, swiss chard, turnips, wildflowers
May
Start indoors: cantaloupes, cosmos, cucumbers, okra, pumpkins, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, beets, carrots, chives, cilantro, dahlias, dill, figs, garden mums, ginger, gladioli, grapes, green onions, kentucky bluegrass, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, oregano, parsley, perennial ryegrass, petunias, potatoes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, sweet peas, swiss chard, tall fescue, thyme
June
Start indoors: zinnias
Plant or sow outdoors: asparagus, basil, bermudagrass, cantaloupes, celery, centipedegrass, cosmos, cucumbers, eggplants, green beans, green onions, okra, peanuts, peppers, pumpkins, st. augustinegrass, sweet potatoes, tomatoes, watermelons, winter squash, zinnias, zoysiagrass, zucchini
July
Plant or sow outdoors: bermudagrass, centipedegrass, green onions, okra, st. augustinegrass, zinnias, zoysiagrass
Plant for fall: bearded irises, broccoli, brussels sprouts, carrots, collard greens, lettuce, peas, snapdragons, 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, cabbages, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, hydrangeas, kale, lilies, ornamental alliums, peonies, radishes, roses, saffron, spinach, tulips
October
Plant for fall: crocuses, daffodils, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips
Frost dates and zones by ZIP code in Herriman
Herriman's 2 main ZIP codes take their frost dates from 2 different NOAA stations: the typical last frost ranges from April 18 in 84065 to May 2 in 84096. Every one of them is in zone 7a.
| ZIP code | Zone | Weather station | Typical last frost | Typical first frost |
|---|---|---|---|---|
| 84065 | 7a | Draper-Point Of Mtn, 2.4 mi E | Apr 18 | Oct 22 |
| 84096 | 7a | Timpanogos Cave, 20.8 mi E | May 2 | Oct 16 |
Timpanogos Cave also supplies the frost dates for Saratoga Springs, so their planting calendars match Herriman's.
Planting dates for popular crops in Herriman
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Apr 6 to 20 | Jun 1 to 15 | — |
| Strawberries | — | Mar 21 to Apr 4 | — |
| Lettuce | Mar 7 to 21 | Apr 25 to May 9 | Jul 17 to Aug 21 |
| Cilantro | Mar 21 to Apr 4 | May 2 to 9 | — |
| Basil | Apr 13 to 27 | Jun 1 to 8 | — |
| Potatoes | — | May 2 to 9 | — |
| Garlic | — | Mar 21 to Apr 4 | Oct 16 to 30 |
| Onions | Jan 10 to Feb 21 | Apr 4 to 18 | — |
| Cucumbers | May 4 to 18 | Jun 1 to 15 | — |
| Pumpkins | May 4 to 18 | Jun 1 to 15 | — |
| Peppers | Mar 16 to Apr 13 | Jun 1 to 15 | — |
| Carrots | — | Apr 11 to May 2 | Jul 24 to Aug 14 |
| Sweet Potatoes | — | Jun 16 to 23 | — |
| Watermelons | Apr 27 to May 11 | Jun 1 to 15 | — |
| Sweet Corn | — | May 2 to 16 | — |
| Green Beans | — | Jun 1 to 15 | — |
| Zucchini | May 4 to 18 | Jun 1 to 15 | — |
| Broccoli | Feb 14 to Mar 7 | Apr 4 to 18 | Jul 31 to Aug 28 |
| Peas | — | Mar 21 to Apr 4 | Jul 24 to Aug 7 |
| Spinach | Mar 21 to 28 | Apr 25 to May 9 | Aug 7 to Sep 11 |
| Sunflowers | — | May 2 to 23 | — |
| Zinnias | Jun 2 to 9 | Jun 30 to Jul 14 | — |
| Tulips | — | — | Sep 4 to Oct 30 |
| Daffodils | — | — | Sep 4 to Oct 16 |
| Grass Seed | — | Mar 21 to Apr 4 | Sep 4 to 18 |
Nearby cities
- South Jordan, UT zone 7a, last frost Apr 18
- West Jordan, UT zone 7b, last frost Apr 8
- Draper, UT zone 7a, last frost Apr 18
- Lehi, UT zone 7a, last frost Apr 17
- Sandy, UT zone 6b, last frost Jun 11
- Saratoga Springs, UT zone 7a, last frost May 2
Planting in UtahAbout zone 7aPrintable calendar for Herriman
Questions
When is the last frost in Herriman?
Around May 2 in a typical year, based on NOAA's 1991-2020 records for Timpanogos Cave. There is still a 1 in 10 chance of frost after May 26.
What planting zone is Herriman in?
USDA hardiness zone 7a (2023 map). The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.
When should I plant tomatoes in Herriman?
Start seeds indoors April 6 to 20 and set plants out June 1 to 15.
When is the first frost in Herriman?
Around October 16 in a typical year, and before October 1 about 1 year in 10.