Fall in zone 4aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 04768 (Aroostook County, ME)
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, Allagash, ME (20 miles away).
- Average last spring frostJun 250% chance of a 32°F freeze after this date
- Average first fall frostSep 1550% chance of a 32°F freeze by this date
- Growing season (frost-free)102 daysmedian, 32°F threshold
- USDA hardiness zone4a-30 to -25°F avg. coldest night
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Frost and freeze alerts from the NWS forecast for 04768, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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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
44°F Below 50°F
24-hour average · latest 41°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Limestone 4 NNW (57 mi).
4-inch depth
44°F Below 50°F
24-hour average · latest 42°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Limestone 4 NNW (57 mi).
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 04768 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 44°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent window is mostly past. Next: spring, when soil reaches 50°F (typically 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) | May 21 |
| 50% (the "average" last frost) | Jun 2 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 21 |
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) | Aug 29 |
| 50% (the "average" first frost) | Sep 15 |
| 90% (late: most years have frozen by now) | Sep 30 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | n/a | n/a |
| 32°F (freeze) | Jun 2 | Sep 15 |
| 28°F (hard freeze) | May 20 | Sep 29 |
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 04768
Dates count from your average last spring frost (Jun 2) and first fall frost (Sep 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 | Apr 7–21 | Jun 9–23 (transplant) | – |
| Pepper (sweet and hot) | Mar 24–Apr 7 | Jun 16–30 (transplant) | – |
| Eggplant | Mar 24–Apr 7 | Jun 16–30 (transplant) | – |
| Tomatillo | Apr 7–21 | Jun 9–23 (transplant) | – |
| Lettuce | Apr 7–21 | May 12–Jun 2 (transplant) May 5–Jun 16 (sow outdoors) | Jul 21–Aug 11 (transplant) Jul 7–Aug 4 (sowing) |
| Spinach | – | Apr 21–May 12 (sow outdoors) | Jul 21–Aug 11 (sowing) |
| Kale | Apr 7–21 | May 5–19 (transplant) May 5–19 (sow outdoors) | Jun 23–Jul 21 (transplant) Jun 9–Jul 7 (sowing) |
| Collards | Apr 7–21 | May 5–Jun 2 (transplant) May 5–Jun 2 (sow outdoors) | Jun 23–Jul 21 (transplant) Jun 9–Jul 7 (sowing) |
| Broccoli | Mar 24–Apr 7 | May 5–19 (transplant) | Jun 9–Jul 7 (transplant) |
| Cabbage | Mar 24–Apr 7 | May 5–19 (transplant) | Jun 9–Jul 7 (transplant) |
| Cauliflower | Mar 24–Apr 7 | May 19–Jun 2 (transplant) | Jun 9–Jul 7 (transplant) |
| Brussels sprouts | Mar 10–24 | May 5–19 (transplant) | May 26–Jun 16 (transplant) |
| Kohlrabi | Apr 7–21 | May 5–19 (transplant) May 5–19 (sow outdoors) | Jul 7–21 (sowing) |
| Bok choy / Asian greens | – | May 5–19 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Arugula | – | May 5–Jun 2 (sow outdoors) | Jul 21–Aug 18 (sowing) |
| Mustard greens | – | May 5–26 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Swiss chard | Apr 21–May 5 | May 19–Jun 9 (transplant) May 19–Jun 16 (sow outdoors) | Jul 7–21 (sowing) |
| Beet | – | May 5–Jun 2 (sow outdoors) | Jul 7–21 (sowing) |
| Carrot | – | May 12–Jun 9 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Radish | – | Apr 28–Jun 9 (sow outdoors) | Aug 4–18 (sowing) |
| Turnip | – | May 5–26 (sow outdoors) | Jul 7–21 (sowing) |
| Parsnip | – | May 12–Jun 2 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 7–May 5 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Onion (bulbing) | Mar 10–24 | Apr 21–May 5 (transplant) | – |
| Green onion / scallion | – | Apr 21–May 19 (sow outdoors) | Jul 7–21 (sowing) |
| Leek | Mar 10–24 | May 5–19 (transplant) | – |
| Garlic | – | – | Aug 4–Sep 1 (sowing) |
| Shallot | – | Apr 21–May 5 (transplant) | Aug 4–Sep 1 (sowing) |
| Potato | – | May 5–19 (transplant) | May 26–Jun 9 (transplant) |
| Sweet potato | – | Jun 23–Jul 7 (transplant) | – |
| Sweet corn | – | Jun 9–23 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 9–23 (sow outdoors) | – |
| Bean, pole | – | Jun 9–23 (sow outdoors) | – |
| Lima bean | – | Jun 16–30 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 23–Jul 14 (sow outdoors) | – |
| Cucumber | May 5–12 | Jun 9–23 (transplant) Jun 9–23 (sow outdoors) | – |
| Summer squash / zucchini | May 5–12 | Jun 9–23 (transplant) Jun 9–23 (sow outdoors) | – |
| Winter squash | May 5–12 | Jun 9–23 (transplant) Jun 9–23 (sow outdoors) | – |
| Pumpkin | – | Jun 9–23 (sow outdoors) | – |
| Watermelon | May 5–12 | Jun 16–30 (transplant) Jun 16–30 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 5–12 | Jun 16–30 (transplant) Jun 16–30 (sow outdoors) | – |
| Okra | Apr 21–May 5 | Jun 16–30 (transplant) Jun 16–30 (sow outdoors) | – |
| Celery | Mar 10–24 | Jun 9–16 (transplant) | – |
| Basil | Apr 21–May 5 | Jun 9–23 (transplant) Jun 9–23 (sow outdoors) | – |
| Cilantro | – | May 19–Jun 16 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Parsley | Mar 24–Apr 7 | May 19–Jun 2 (transplant) May 12–Jun 2 (sow outdoors) | – |
| Dill | – | Jun 2–16 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Sunflower | – | Jun 2–16 (sow outdoors) | – |
| Asparagus (crowns) | – | May 5–19 (transplant) | – |
| Rhubarb (crowns) | – | May 5–19 (transplant) | – |
| Strawberry (plants) | – | May 5–19 (transplant) | Jul 7–Aug 4 (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: Allagash, ME (NOAA GHCN-Daily ID USC00170200), elevation 596 ft, 20.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Clayton Lake, ME | 26 mi | May 30 | Sep 13 |
| Ft Kent, ME | 37 mi | May 23 | Sep 24 |
| Frenchville Aroostook AP, ME | 49 mi | May 6 | Oct 2 |
The average last-frost dates of these stations span 27 days, a rough guide to local variation. See data sources & methods.
Frost questions for 04768
When is the last frost in 04768?
The average (50% chance) last spring freeze of 32°F for ZIP 04768 is June 2. For a more cautious planting date, use June 21, when only 1 year in 10 still sees a later freeze.
When is the first frost in 04768?
The average first fall freeze is September 15. In 1 year in 10 it comes by August 29.
What hardiness zone is 04768?
ZIP 04768 is in USDA zone 4a (-30 to -25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 04768 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
04774 04739 Eagle Lake 04737 04743 Fort Kent 04732 Ashland 04781 04766 04786 Washburn
Other ZIP codes in Aroostook County
04451 04459 04471 04497 04730 04732 04733 04734 04735 04736 04737 04739 04740 04742 04743 04745 04746 04747 04750 04756 04757 04758 04760 04761 All Aroostook County frost dates · Maine 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.