Justice, IL planting zone & frost dates
Justice is in USDA hardiness zone 6a. The last spring frost usually comes around April 19 and the first fall frost around October 22, for a growing season of about 183 days.
Planting calendar for Justice
Dates are counted from the average last spring frost (April 19) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Feb 22 – Mar 8 Transplant outdoors: Apr 26 – May 3 |
| Peppers | Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: May 3 – May 10 |
| Eggplant | Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: May 3 – May 10 |
| Broccoli | Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: Mar 22 – Apr 5 |
| Cabbage | Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: Mar 22 – Apr 5 |
| Onions (sets) | Plant outdoors: Mar 22 – Apr 5 |
| Peas | Sow outdoors: Mar 8 – Mar 22 |
| Spinach | Sow outdoors: Mar 8 – Mar 22 |
| Lettuce | Sow outdoors: Mar 22 – Apr 5 |
| Carrots | Sow outdoors: Mar 22 – Apr 5 |
| Potatoes | Plant outdoors: Mar 22 – Apr 5 |
| Beans | Sow outdoors: Apr 26 – May 3 |
| Sweet corn | Sow outdoors: Apr 26 – May 3 |
| Cucumbers | Sow outdoors: Apr 26 – May 3 |
| Squash & zucchini | Sow outdoors: Apr 26 – May 3 |
| Basil | Start seeds indoors: Mar 8 – Mar 22 Transplant outdoors: Apr 26 – May 3 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Aug 27 (8 weeks before the average first fall frost on Oct 22).
Useful for zone 6a gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
- Cold frame / mini greenhouse — adds weeks to a short season
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Apr 6 | Apr 19 | May 5 |
| First 32°F frost in fall is before | Nov 3 | Oct 22 | Oct 8 |
How to read it: in spring there is a 10% chance of a frost after May 5, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 8. A hard freeze (28°F) usually ends around April 7.
Hardiness zone by ZIP code in Justice
- 60458 zone 6a
Nearby cities
- Hickory Hills zone 6a, last frost Apr 10
- Bridgeview zone 6a, last frost Apr 10
- Summit zone 6a, last frost Apr 11
- Palos Hills zone 6a, last frost Apr 19
- Burbank zone 6a, last frost Apr 10
- Worth zone 6a, last frost Apr 10
- La Grange zone 6a, last frost Apr 11
- Lyons zone 6a, last frost Apr 11
Questions
What growing zone is Justice, IL?
Justice is in USDA Plant Hardiness Zone 6a (average extreme winter low -10°F to -5°F), according to the USDA 2023 map.
When is the last frost in Justice?
The average last spring frost (32°F) in Justice is April 19. There is still a 10% chance of frost until May 5.
When can I plant tomatoes in Justice?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 26 – May 3. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Little Red School Hse, IL (USC00115110), 5.0 km (3.1 mi) from the city center, elevation 218 m, based on 7 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.