Leaburg 1 SW, OR Frost Dates & Growing Season

The two dates every Leaburg 1 SW garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 3
~50% chance of frost after
First fall frost
Nov 11
~50% chance of frost before
Growing season
222 days
frost-free stretch
USDA zone
≈ 9a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Mar 5 Apr 3 May 2
First fall frost Dec 5 Nov 11 Oct 21
Hard freeze (28°F), median last Feb 22 · first Dec 4

Computed from NOAA 1991–2020 climate normals at the LEABURG 1 SW 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 Leaburg 1 SW

Computed from Leaburg 1 SW's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 6 – Feb 20 Apr 10 – Apr 17
🫑 Peppers Jan 23 – Feb 6 Apr 17 – Apr 24
🥬 Lettuce Feb 20 – Mar 6 Mar 6 – Mar 20 Mar 6 – Apr 3
🫛 Peas Feb 20 – Mar 6
🥕 Carrots Mar 13 – Apr 3
🥦 Broccoli Feb 13 – Feb 27 Mar 13 – Mar 27
🥬 Kale Feb 20 – Mar 6 Mar 6 – Mar 20 Mar 6 – Mar 20
🥒 Cucumbers Mar 6 – Mar 13 Apr 10 – Apr 17 Apr 10 – Apr 17
🥒 Zucchini Mar 6 – Mar 13 Apr 10 – Apr 17 Apr 10 – Apr 17
🫘 Green Beans (Bush) Apr 10 – Apr 17
🌽 Sweet Corn Apr 10 – Apr 17
🌿 Basil Feb 20 – Mar 6 Apr 10 – Apr 17 Apr 17 – Apr 24
🧄 Garlic Fall: Sep 30 – Oct 28

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 Leaburg 1 SW's dates automatically after a lookup.

Reading the season in Leaburg 1 SW

With roughly 222 frost-free days, Leaburg 1 SW gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Nov 11 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Leaburg 1 SW, OR?

The average last spring frost in Leaburg 1 SW is around Apr 3, 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 Leaburg 1 SW, OR?

The average first fall frost in Leaburg 1 SW arrives around Nov 11. 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 Leaburg 1 SW?

About 222 frost-free days on average, from Apr 3 to Nov 11. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Leaburg 1 SW in?

USDA zone 9a 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.