Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 48128 (Dearborn, MI)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Dearborn, MI (1 miles away).
- Average last spring frostMay 150% chance of a 32°F freeze after this date
- Average first fall frostOct 1550% chance of a 32°F freeze by this date
- Growing season (frost-free)166 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 48128 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring mid-April to early May.
Fertilizer window
Lawn region: North (cool-season). Timing only; always follow the product label.
- Kentucky bluegrass (cool-season): Early fall: Around Labor Day (late August–September); Late fall: Late October–November, before the ground freezes; Late spring: Optional around Memorial Day. Avoid: Early-spring and midsummer feeding (pushes top growth, favors crabgrass).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Apr 17 |
| 50% (the "average" last frost) | May 1 |
| 10% (cautious: only 1 year in 10 freezes later) | May 18 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 1 |
| 50% (the "average" first frost) | Oct 15 |
| 90% (late: most years have frozen by now) | Oct 28 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 12 | Oct 5 |
| 32°F (freeze) | May 1 | Oct 15 |
| 28°F (hard freeze) | Apr 20 | Oct 28 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 48128
Dates count from your average last spring frost (May 1) and first fall frost (Oct 15). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Mar 6–20 | May 8–22 (transplant) | – |
| Pepper (sweet and hot) | Feb 20–Mar 6 | May 15–29 (transplant) | – |
| Eggplant | Feb 20–Mar 6 | May 15–29 (transplant) | – |
| Tomatillo | Mar 6–20 | May 8–22 (transplant) | – |
| Lettuce | Mar 6–20 | Apr 10–May 1 (transplant) Apr 3–May 15 (sow outdoors) | Aug 20–Sep 10 (transplant) Aug 6–Sep 3 (sowing) |
| Spinach | – | Mar 20–Apr 10 (sow outdoors) | Aug 20–Sep 10 (sowing) |
| Kale | Mar 6–20 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Jul 23–Aug 20 (transplant) Jul 9–Aug 6 (sowing) |
| Collards | Mar 6–20 | Apr 3–May 1 (transplant) Apr 3–May 1 (sow outdoors) | Jul 23–Aug 20 (transplant) Jul 9–Aug 6 (sowing) |
| Broccoli | Feb 20–Mar 6 | Apr 3–17 (transplant) | Jul 9–Aug 6 (transplant) |
| Cabbage | Feb 20–Mar 6 | Apr 3–17 (transplant) | Jul 9–Aug 6 (transplant) |
| Cauliflower | Feb 20–Mar 6 | Apr 17–May 1 (transplant) | Jul 9–Aug 6 (transplant) |
| Brussels sprouts | Feb 6–20 | Apr 3–17 (transplant) | Jun 25–Jul 16 (transplant) |
| Kohlrabi | Mar 6–20 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 6–20 (sowing) |
| Bok choy / Asian greens | – | Apr 3–17 (sow outdoors) | Aug 20–Sep 3 (sowing) |
| Arugula | – | Apr 3–May 1 (sow outdoors) | Aug 20–Sep 17 (sowing) |
| Mustard greens | – | Apr 3–24 (sow outdoors) | Aug 20–Sep 3 (sowing) |
| Swiss chard | Mar 20–Apr 3 | Apr 17–May 8 (transplant) Apr 17–May 15 (sow outdoors) | Aug 6–20 (sowing) |
| Beet | – | Apr 3–May 1 (sow outdoors) | Aug 6–20 (sowing) |
| Carrot | – | Apr 10–May 8 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Radish | – | Mar 27–May 8 (sow outdoors) | Sep 3–17 (sowing) |
| Turnip | – | Apr 3–24 (sow outdoors) | Aug 6–20 (sowing) |
| Parsnip | – | Apr 10–May 1 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 6–Apr 3 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Onion (bulbing) | Feb 6–20 | Mar 20–Apr 3 (transplant) | – |
| Green onion / scallion | – | Mar 20–Apr 17 (sow outdoors) | Aug 6–20 (sowing) |
| Leek | Feb 6–20 | Apr 3–17 (transplant) | – |
| Garlic | – | – | Sep 3–Oct 1 (sowing) |
| Shallot | – | Mar 20–Apr 3 (transplant) | Sep 3–Oct 1 (sowing) |
| Potato | – | Apr 3–17 (transplant) | Jun 25–Jul 9 (transplant) |
| Sweet potato | – | May 22–Jun 5 (transplant) | – |
| Sweet corn | – | May 8–22 (sow outdoors) | – |
| Bean, bush (snap) | – | May 8–22 (sow outdoors) | – |
| Bean, pole | – | May 8–22 (sow outdoors) | – |
| Lima bean | – | May 15–29 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 22–Jun 12 (sow outdoors) | – |
| Cucumber | Apr 3–10 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Summer squash / zucchini | Apr 3–10 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Winter squash | Apr 3–10 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Pumpkin | – | May 8–22 (sow outdoors) | – |
| Watermelon | Apr 3–10 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 3–10 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Okra | Mar 20–Apr 3 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Celery | Feb 6–20 | May 8–15 (transplant) | – |
| Basil | Mar 20–Apr 3 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Cilantro | – | Apr 17–May 15 (sow outdoors) | Aug 20–Sep 3 (sowing) |
| Parsley | Feb 20–Mar 6 | Apr 17–May 1 (transplant) Apr 10–May 1 (sow outdoors) | – |
| Dill | – | May 1–15 (sow outdoors) | Aug 20–Sep 3 (sowing) |
| Sunflower | – | May 1–15 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 3–17 (transplant) | – |
| Rhubarb (crowns) | – | Apr 3–17 (transplant) | – |
| Strawberry (plants) | – | Apr 3–17 (transplant) | Aug 6–Sep 3 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Dearborn, MI (NOAA GHCN-Daily ID USC00202015), elevation 605 ft, 1.1 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Dearborn #2, MI | 5 mi | Apr 27 | Oct 25 |
| Detroit Metro AP, MI | 7 mi | Apr 20 | Oct 27 |
| Farmington, MI | 11 mi | May 1 | Oct 17 |
The average last-frost dates of these stations span 12 days, a rough guide to local variation. See data sources & methods.
Frost questions for 48128
When is the last frost in 48128?
The average (50% chance) last spring freeze of 32°F for ZIP 48128 is May 1. For a more cautious planting date, use May 18, when only 1 year in 10 still sees a later freeze.
When is the first frost in 48128?
The average first fall freeze is October 15. In 1 year in 10 it comes by October 1.
What hardiness zone is 48128?
ZIP 48128 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 48128 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
48127 Dearborn Heights 48124 Dearborn 48125 Dearborn Heights 48228 Detroit 48141 Inkster 48126 Dearborn 48239 Detroit 48135 Garden City
Other ZIP codes in Wayne County
48101 48111 48120 48122 48124 48125 48126 48127 48134 48135 48138 48141 48146 48150 48152 48154 48164 48168 48170 48173 48174 48180 48183 48184 All Wayne County frost dates · Michigan frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.