When to plant in Homer Glen, IL
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Homer Glen, Illinois — all computed from Homer Glen's nearest NOAA weather station.
In zone 6a, Homer Glen gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
ROMEOVILLE WFO · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Homer Glen’s own odds, recorded at ROMEOVILLE WFO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | May 1 | Apr 17 | Sep 28 | Oct 12 | Oct 24 |
| 32°F | May 6 | Apr 20 | Apr 7 | Oct 7 | Oct 22 | Nov 3 |
| 28°F | Apr 23 | Apr 8 | Mar 27 | Oct 19 | Nov 1 | Nov 15 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Homer Glen, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Homer Glen planting FAQ
When is the last spring frost in Homer Glen, IL?
Plan for the last spring frost in Homer Glen around April 20 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Homer Glen, IL?
Expect Homer Glen's first fall frost near October 22 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Homer Glen in?
Homer Glen is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Homer Glen?
Homer Glen has about 185 frost-free days — a moderate growing season — between the average last spring frost (April 20) and first fall frost (October 22).
When should I plant tomatoes in Homer Glen?
For Homer Glen, sow tomatoes indoors about February 23–March 9 and move the seedlings out around April 27, after the last spring frost.
Never miss a window in Homer Glen
An email when it’s time to start seeds, transplant, and sow — timed to Homer Glen’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lockport · 7 km
- Lemont · 7 km
- Orland Park · 8 km
- Mokena · 10 km
- New Lenox · 11 km
- Romeoville · 13 km
- Frankfort · 13 km
- Tinley Park · 13 km
Frost dates recorded at ROMEOVILLE WFO, 11 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Homer Glen, IL — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00117457. Retrieved from https://blissgarden.com/illinois/homer-glen.