Arlington, OR Frost Dates & Growing Season

The two dates every Arlington garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 6
~50% chance of frost after
First fall frost
Oct 21
~50% chance of frost before
Growing season
198 days
frost-free stretch
USDA zone
≈ 7a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Mar 22 Apr 6 Apr 28
First fall frost Nov 7 Oct 21 Oct 6
Hard freeze (28°F), median last Mar 19 · first Nov 3

Computed from NOAA 1991–2020 climate normals at the ARLINGTON station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Arlington

Computed from Arlington's own frost dates. Click any crop for the full zone-7 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 9 – Feb 23 Apr 13 – Apr 20
🫑 Peppers Jan 26 – Feb 9 Apr 20 – Apr 27
🥬 Lettuce Feb 23 – Mar 9 Mar 9 – Mar 23 Mar 9 – Apr 6
🫛 Peas Feb 23 – Mar 9
🥕 Carrots Mar 16 – Apr 6
🥦 Broccoli Feb 16 – Mar 2 Mar 16 – Mar 30
🥬 Kale Feb 23 – Mar 9 Mar 9 – Mar 23 Mar 9 – Mar 23
🥒 Cucumbers Mar 9 – Mar 16 Apr 13 – Apr 20 Apr 13 – Apr 20
🥒 Zucchini Mar 9 – Mar 16 Apr 13 – Apr 20 Apr 13 – Apr 20
🫘 Green Beans (Bush) Apr 13 – Apr 20
🌽 Sweet Corn Apr 13 – Apr 20
🌿 Basil Feb 23 – Mar 9 Apr 13 – Apr 20 Apr 20 – Apr 27
🧄 Garlic Fall: Sep 9 – Oct 7

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Arlington's dates automatically after a lookup.

Reading the season in Arlington

Roughly 198 frost-free days gives Arlington gardeners room for nearly every common vegetable. Warm-season crops go out after Apr 6; a fall garden sown in late summer matures comfortably before the Oct 21 frost.

Frequently asked questions

When is the last frost in Arlington, OR?

The average last spring frost in Arlington is around Apr 6, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Arlington, OR?

The average first fall frost in Arlington arrives around Oct 21. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Arlington?

About 198 frost-free days on average, from Apr 6 to Oct 21. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Arlington in?

USDA zone 7a on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.