When to plant in Woodridge, IL
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Woodridge, Illinois — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Woodridge gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
LISLE-MORTON ARBORETUM · 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 Woodridge’s own odds, recorded at LISLE-MORTON ARBORETUM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 25 | May 9 | Apr 25 | Sep 22 | Oct 6 | Oct 18 |
| 32°F | May 14 | Apr 28 | Apr 14 | Oct 1 | Oct 16 | Oct 29 |
| 28°F | May 4 | Apr 16 | Apr 2 | Oct 12 | Oct 26 | Nov 8 |
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 Woodridge, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
Woodridge planting FAQ
When is the last spring frost in Woodridge, IL?
On average, the last spring frost in Woodridge is around April 28 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Woodridge, IL?
Expect Woodridge's first fall frost near October 16 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Woodridge in?
Woodridge 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 Woodridge?
Woodridge has about 171 frost-free days — a moderate growing season — between the average last spring frost (April 28) and first fall frost (October 16).
When should I plant tomatoes in Woodridge?
For Woodridge, sow tomatoes indoors about March 3–March 17 and move the seedlings out around May 5, after the last spring frost.
Never miss a window in Woodridge
An email when it’s time to start seeds, transplant, and sow — timed to Woodridge’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Darien · 5 km
- Downers Grove · 7 km
- Lisle · 7 km
- Bolingbrook · 8 km
- Westmont · 9 km
- Lemont · 9 km
- Naperville · 10 km
- Burr Ridge · 10 km
Frost dates recorded at LISLE-MORTON ARBORETUM, 9 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 Woodridge, IL — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00115097. Retrieved from https://blissgarden.com/illinois/woodridge.