Frost Dates & Planting Calendar for Eagle Mountain, UT
Plan your garden around Eagle Mountain, UT's typical frost-free growing season, using NOAA climate normals and a 42-crop planting calendar built for this location.
Last Spring Frost
June 2
Safe Jun 24
Typical Jun 2
Risky May 18
First Fall Frost
September 16
Safe Sep 1
Typical Sep 16
Risky Sep 29
Growing Season
103 days
Typical last frost to typical first frost.
USDA Hardiness Zone
Zone 6b
A classic four-season climate with cold winters and a solid summer growing season.
Data: NOAA station FAIRFIELD, UT US, 9.1 km away.
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days until the typical last spring frost
Monthly Temperatures
Avg. high
Avg. temp
Avg. low
Planting Calendar
| Crop | Start indoors | Direct sow | Transplant | Fall planting | Maturity | Notes |
|---|---|---|---|---|---|---|
| Tomato | Apr 7 – Apr 21 | — | Jun 9 – Jun 16 | — | 60–85 days | Start indoors 6-8 weeks before last frost; transplant out 1-2 weeks after last frost once soil has warmed. |
| Pepper | Mar 24 – Apr 7 | — | Jun 9 – Jun 23 | — | 60–90 days | Slow to germinate; start indoors 8-10 weeks before last frost. Transplant only once nights stay above 55F, 1-3 weeks after last frost. |
| Eggplant | Mar 24 – Apr 7 | — | Jun 16 – Jun 23 | — | 65–85 days | Warm-season crop, similar timing to pepper; needs consistently warm soil (65F+) to transplant. |
| Cucumber | May 5 – May 12 | Jun 9 – Jun 16 | Jun 9 – Jun 16 | — | 50–65 days | Can be started indoors 3-4 weeks before transplanting, or direct-sown 1-2 weeks after last frost once soil is warm. |
| Zucchini | May 12 – May 19 | Jun 9 – Jun 23 | Jun 9 – Jun 16 | — | 45–55 days | Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start. |
| Winter Squash | May 5 – May 12 | Jun 9 – Jun 23 | Jun 9 – Jun 16 | — | 80–110 days | Long season; direct sow after soil warms, or start indoors 3-4 weeks before last frost in short-season climates. |
| Pumpkin | — | Jun 9 – Jun 23 | — | — | 90–120 days | Direct sow 1-3 weeks after last frost; back-time from your first fall frost so the 90-120 day maturity window lands before it. |
| Watermelon | May 5 – May 12 | — | Jun 16 – Jun 23 | — | 70–90 days | Needs warm soil (65F+); start indoors 3-4 weeks before last frost, transplant 2-3 weeks after last frost. |
| Cantaloupe | May 5 – May 12 | — | Jun 16 – Jun 23 | — | 70–90 days | Same warm-soil requirements as watermelon; avoid disturbing roots when transplanting. |
| Corn | — | Jun 2 – Jun 16 | — | — | 60–100 days | Direct sow at last frost to 2 weeks after, once soil reaches 60F; does not transplant well. Succession sow every 2 weeks. |
| Green Bean | — | Jun 2 – Jun 16 | — | — | 50–65 days | Direct sow at last frost to 2 weeks after, once soil has warmed; frost-tender, do not rush. |
| Pea | — | Apr 21 – May 5 | — | — | 55–70 days | Cold-hardy; direct sow 4-6 weeks before last frost as soon as soil can be worked. |
| Lettuce | — | May 5 – May 19 | — | Jul 22 – Aug 5 | 45–60 days | Cold-hardy; direct sow 2-4 weeks before last frost. Also transplantable from indoor starts. |
| Spinach | — | Apr 21 – May 5 | — | Jul 22 – Aug 5 | 40–50 days | Very cold-hardy; direct sow 4-6 weeks before last frost as soon as soil can be worked. |
| Kale | — | May 5 – May 19 | — | Jul 8 – Jul 22 | 50–65 days | Cold-hardy; direct sow 2-4 weeks before last frost or start indoors for earlier transplants. |
| Arugula | — | May 5 – May 19 | — | Aug 5 – Aug 12 | 30–40 days | Fast-growing, cold-tolerant green; direct sow 2-4 weeks before last frost, succession sow every 2-3 weeks. |
| Swiss Chard | — | May 12 – May 26 | — | — | 50–60 days | Fairly cold-hardy; direct sow 1-3 weeks before last frost. Tolerates light frost in fall too. |
| Broccoli | Apr 14 – Apr 28 | — | May 12 – May 19 | Jul 15 – Jul 22 | 55–80 days | Start indoors 5-7 weeks before last frost; transplant out 2-3 weeks before last frost (hardens off to light frost). |
| Cauliflower | Apr 14 – Apr 28 | — | May 19 – May 26 | Jul 8 – Jul 15 | 55–85 days | Fussier than broccoli about temperature swings; start indoors 5-7 weeks before last frost, transplant 1-2 weeks before last frost. |
| Cabbage | Apr 14 – Apr 28 | — | May 5 – May 19 | Jul 8 – Jul 22 | 60–100 days | Cold-hardy; start indoors 5-7 weeks before last frost, transplant 2-4 weeks before last frost. |
| Brussels Sprouts | Apr 14 – Apr 28 | — | May 12 – May 26 | — | 90–110 days | Long-season crop best timed to mature after a light fall frost for sweetest flavor; start indoors 5-7 weeks before last frost. |
| Carrot | — | May 5 – May 19 | — | Jun 24 – Jul 8 | 60–80 days | Direct sow only (does not transplant); sow 2-4 weeks before last frost, as soon as soil can be worked. |
| Beet | — | May 5 – May 19 | — | Jul 8 – Jul 22 | 50–65 days | Direct sow 2-4 weeks before last frost; tolerates light frost. |
| Radish | — | Apr 28 – May 12 | — | Aug 5 – Aug 19 | 22–30 days | Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked. |
| Turnip | — | May 5 – May 19 | — | Jul 8 – Jul 22 | 40–60 days | Cold-hardy; direct sow 2-4 weeks before last frost. |
| Onion | Mar 24 – Apr 7 | — | May 5 – May 19 | — | 90–120 days | Start seeds indoors 8-10 weeks before last frost (or use sets/transplants); set out 2-4 weeks before last frost, very cold-tolerant as seedlings. |
| Garlic | — | — | — | Aug 19 – Sep 2 | 240–270 days | Fall-planted crop only; not planted in spring in most climates. |
| Potato | — | May 5 – May 19 | — | — | 70–120 days | Plant seed potatoes 2-4 weeks before last frost, as soon as soil can be worked and is above 45F; light frost on emerging foliage is usually tolerated. |
| Sweet Potato | — | — | Jun 16 – Jun 30 | — | 90–120 days | Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive. |
| Asparagus | — | — | May 5 – May 19 | — | 730–1095 days | Perennial; plant crowns 2-4 weeks before last frost as soon as soil can be worked. Takes 2-3 years to full production. |
| Crop | Start indoors | Direct sow | Transplant | Fall planting | Maturity | Notes |
|---|---|---|---|---|---|---|
| Basil | Apr 21 – Apr 28 | — | Jun 9 – Jun 16 | — | 50–70 days | Very frost/cold sensitive; start indoors 5-6 weeks before last frost, transplant only after all danger of frost (1-2 weeks after) and nights stay warm. |
| Cilantro | — | May 12 – May 26 | — | Jul 22 – Aug 5 | 45–70 days | Cool-season, bolts in heat; direct sow 1-3 weeks before last frost, succession sow through spring. |
| Parsley | Apr 7 – Apr 21 | — | May 19 – May 26 | — | 70–90 days | Slow to germinate; start indoors 6-8 weeks before last frost, transplant 1-2 weeks before last frost (biennial, cold-tolerant). |
| Dill | — | May 12 – May 26 | — | — | 40–60 days | Taprooted, does not transplant well; direct sow 1-3 weeks before last frost, succession sow through summer. |
| Oregano | Apr 7 – Apr 21 | — | Jun 2 – Jun 9 | — | 80–90 days | Perennial herb; start indoors 6-8 weeks before last frost, transplant around/just after last frost date. |
| Thyme | Apr 7 – Apr 21 | — | Jun 2 – Jun 9 | — | 85–95 days | Perennial herb, slow from seed; start indoors 6-8 weeks before last frost, transplant around/after last frost. |
| Crop | Start indoors | Direct sow | Transplant | Fall planting | Maturity | Notes |
|---|---|---|---|---|---|---|
| Sunflower | — | Jun 9 – Jun 23 | — | — | 70–100 days | Direct sow 1-3 weeks after last frost once soil has warmed; taprooted, resents transplanting. |
| Zinnia | May 5 – May 12 | Jun 9 – Jun 23 | Jun 9 – Jun 16 | — | 60–70 days | Frost-tender; direct sow 1-3 weeks after last frost, or start indoors 3-4 weeks early for earlier blooms. |
| Marigold | Apr 21 – May 5 | — | Jun 9 – Jun 16 | — | 45–60 days | Frost-tender; start indoors 4-6 weeks before last frost, transplant after all frost danger has passed. |
| Cosmos | May 5 – May 12 | Jun 9 – Jun 23 | Jun 9 – Jun 16 | — | 60–90 days | Easy from direct seed 1-3 weeks after last frost; can also start indoors 3-4 weeks early. |
| Nasturtium | — | Jun 9 – Jun 23 | — | — | 50–65 days | Frost-tender, resents root disturbance; direct sow 1-3 weeks after last frost once soil has warmed. |
| Dahlia | — | — | Jun 9 – Jun 23 | — | 90–120 days | Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive. |
Date ranges are estimates based on university extension guidelines and this city's NOAA frost normals — not a guarantee. Scroll to see all columns on narrow screens.
Frequently Asked Questions
When is the last frost in Eagle Mountain, UT?
Based on 1991–2020 NOAA climate normals for the FAIRFIELD, UT US station, the last spring frost in Eagle Mountain typically falls around June 2. A cautious gardener might wait until June 24 (only a 10% chance of a later frost), while May 18 marks an earlier, higher-risk planting date.
When is the first frost in Eagle Mountain, UT in fall?
The first fall frost in Eagle Mountain typically arrives around September 16. To stay safe, assume frost could start as early as September 1; in milder years it can hold off until September 29.
How long is the growing season in Eagle Mountain, UT?
Eagle Mountain's average frost-free growing season is about 103 days, running from the typical last spring frost (June 2) to the typical first fall frost (September 16).
What USDA hardiness zone is Eagle Mountain, UT in?
Eagle Mountain, UT is in USDA plant hardiness zone 6b, per the USDA's 2023 Plant Hardiness Zone Map. A classic four-season climate with cold winters and a solid summer growing season.