When to plant in Damascus, OR
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Damascus, Oregon — all computed from Damascus's nearest NOAA weather station.
With about 249 frost-free days, Damascus supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Zone 8b means many perennials and even some tender shrubs overwinter in Damascus, while your frost dates still decide when annuals go out.
Frost probability
PORTLAND TROUTDALE AP · 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 Damascus’s own odds, recorded at PORTLAND TROUTDALE AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 4 | Apr 19 | Mar 27 | Oct 11 | Oct 30 | Nov 22 |
| 32°F | Apr 12 | Mar 16 | Feb 18 | Oct 30 | Nov 20 | Dec 17 |
| 28°F | Mar 10 | Feb 14 | Dec 27 | Nov 15 | Dec 15 | Feb 3 |
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 Damascus, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Damascus planting FAQ
When is the last spring frost in Damascus, OR?
On average, the last spring frost in Damascus is around March 16 (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 Damascus, OR?
Expect Damascus's first fall frost near November 20 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Damascus in?
Damascus is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Damascus?
There are roughly 249 frost-free days in Damascus (a long growing season), running from the average last frost around March 16 to the first fall frost near November 20.
When should I plant tomatoes in Damascus?
In Damascus, start tomato seeds indoors around January 19–February 2, then transplant seedlings outdoors around March 23 once the danger of frost has passed.
Never miss a window in Damascus
An email when it’s time to start seeds, transplant, and sow — timed to Damascus’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at PORTLAND TROUTDALE AP, 14 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 Damascus, OR — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024242. Retrieved from https://blissgarden.com/oregon/damascus.