Newport 3N, OR Frost Dates & Growing Season

The two dates every Newport 3N garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Mar 12
~50% chance of frost after
First fall frost
Dec 10
~50% chance of frost before
Growing season
273 days
frost-free stretch
USDA zone
≈ 9a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jan 24 Mar 12 Apr 16
First fall frost Feb 8 Dec 10 Nov 7
Hard freeze (28°F), median last Jan 28 · first Dec 28

Computed from NOAA 1991–2020 climate normals at the NEWPORT 3N 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 Newport 3N

Computed from Newport 3N'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 Jan 15 – Jan 29 Mar 19 – Mar 26
🫑 Peppers Jan 1 – Jan 15 Mar 26 – Apr 2
🥬 Lettuce Jan 29 – Feb 12 Feb 12 – Feb 26 Feb 12 – Mar 12
🫛 Peas Jan 29 – Feb 12
🥕 Carrots Feb 19 – Mar 12
🥦 Broccoli Jan 22 – Feb 5 Feb 19 – Mar 5
🥬 Kale Jan 29 – Feb 12 Feb 12 – Feb 26 Feb 12 – Feb 26
🥒 Cucumbers Feb 12 – Feb 19 Mar 19 – Mar 26 Mar 19 – Mar 26
🥒 Zucchini Feb 12 – Feb 19 Mar 19 – Mar 26 Mar 19 – Mar 26
🫘 Green Beans (Bush) Mar 19 – Mar 26
🌽 Sweet Corn Mar 19 – Mar 26
🌿 Basil Jan 29 – Feb 12 Mar 19 – Mar 26 Mar 26 – Apr 2
🧄 Garlic Fall: Oct 29 – Nov 26

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 Newport 3N's dates automatically after a lookup.

Reading the season in Newport 3N

With roughly 273 frost-free days, Newport 3N 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 Dec 10 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Newport 3N, OR?

The average last spring frost in Newport 3N is around Mar 12, 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 Newport 3N, OR?

The average first fall frost in Newport 3N arrives around Dec 10. 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 Newport 3N?

About 273 frost-free days on average, from Mar 12 to Dec 10. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Newport 3N 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.