Home / Planting dates / Onion sets / Columbia and Snake River valleys, Oregon
Onion sets planting and harvest datesOnion sets Planting Dates in Columbia and Snake River valleys, Oregon
Usual onion sets planting periods in Columbia and Snake River valleys, Oregon, shown as ranges with their source. Use them to frame a plan, then adjust for your own frost dates and soil temperature.
| Activity | Window | Source | Last verified |
|---|---|---|---|
| Planting | April | source | 2026-11-11 |
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Planting | Planting window in April |
What these dates mean in Columbia and Snake River valleys, Oregon
Planting usually runs about 30 days, from Apr 1 to Apr 30.
Frost-date caveat: these are published ranges for Columbia and Snake River valleys, Oregon. A northern or high-elevation site will run later than a southern or low one, and a cold wet spring can push planting past the window. Monthly advice is not applicable to all areas of Oregon; frost dates and local conditions vary. Check your last spring frost and soil temperature, and confirm with your county extension office.
Onion sets dates in other places
Other crops in Columbia and Snake River valleys, Oregon
- Beets
- Broccoli
- Brussels sprouts
- Cabbage
- Cantaloupes
- Carrots
- Cauliflower
- Chard
- Chinese cabbage
- Eggplant
- Endive
- Kale
- Kohlrabi
- Leeks
- Lettuce
- Lima beans
- Okra
- Parsnips
- Peas
- Peppers
- Pickling cucumbers
- Potatoes
- Pumpkins
- Radishes
- Rhubarb
- Rutabagas
- Slicing cucumbers
- Snap beans
- Summer squash
- Sweet corn
- Sweet potatoes
- Tomatoes
- Turnips
- Watermelon
- Winter squash
Last reviewed: November 2026. Source: OSU Extension april garden calendar.