When to plant in Lebanon, OR
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Lebanon, Oregon — all computed from Lebanon's nearest NOAA weather station.
A generous ~249-day season lets Lebanon gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 8b means many perennials and even some tender shrubs overwinter in Lebanon, while your frost dates still decide when annuals go out.
Frost probability
LEBANON · 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 Lebanon’s own odds, recorded at LEBANON.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 4 | Apr 15 | Mar 25 | Oct 8 | Oct 28 | Nov 20 |
| 32°F | Apr 14 | Mar 14 | Feb 18 | Oct 27 | Nov 18 | Dec 15 |
| 28°F | Mar 8 | Feb 15 | Dec 26 | Nov 8 | Dec 10 | Jan 16 |
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 Lebanon, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Lebanon planting FAQ
When is the last spring frost in Lebanon, OR?
Lebanon's average last spring frost falls near March 14 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Lebanon, OR?
In Lebanon, the first 32°F freeze of fall lands around November 18 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Lebanon in?
Lebanon is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Lebanon?
There are roughly 249 frost-free days in Lebanon (a long growing season), running from the average last frost around March 14 to the first fall frost near November 18.
When should I plant tomatoes in Lebanon?
In Lebanon, start tomato seeds indoors around January 17–January 31, then transplant seedlings outdoors around March 21 once the danger of frost has passed.
Never miss a window in Lebanon
An email when it’s time to start seeds, transplant, and sow — timed to Lebanon’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Albany · 18 km
- Sweet Home · 22 km
- Corvallis · 30 km
- Independence · 43 km
- Monmouth · 44 km
- Four Corners · 45 km
- Salem · 45 km
- Santa Clara · 50 km
Frost dates recorded at LEBANON, 1 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 Lebanon, OR — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00354819. Retrieved from https://blissgarden.com/oregon/lebanon.