Root Vegetable

When to Plant Carrots in Oregon

Patience is the secret ingredient. Carrots are slow to germinate but deliver sweet, crunchy rewards.

The Short Answer

In Oregon, soil conditions are an important factor for carrots. Rich volcanic soils in Willamette Valley. Dry, alkaline soils east of Cascades. Acidic forest soils on coast. Generally excellent for gardening in valleys. Direct sow 3 weeks before your last frost date. Carrots can also be planted in fall, 10 weeks before your first frost.

Oregon Frost Dates

Your planting dates depend on which part of Oregon you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Willamette Valley 8a, 8b Mar 25 - Apr 15 Oct 15 - Nov 10
Portland Metro 8b, 9a Mar 15 - Apr 5 Oct 25 - Nov 15
Central/Eastern Oregon 5a, 5b, 6a, 6b May 10 - Jun 1 Sep 10 - Oct 1
Southern Oregon Coast 8b, 9a, 9b Mar 5 - Mar 25 Nov 5 - Nov 25

Carrots Planting Schedule for Oregon

Willamette Valley (Zones 8a, 8b)

Average last frost: Mar 25 - Apr 15 · Average first frost: Oct 15 - Nov 10

Direct Sow
3 wks before frost
Fall Planting
10 wks before first frost

Portland Metro (Zones 8b, 9a)

Average last frost: Mar 15 - Apr 5 · Average first frost: Oct 25 - Nov 15

Direct Sow
3 wks before frost
Fall Planting
10 wks before first frost

Central/Eastern Oregon (Zones 5a, 5b, 6a, 6b)

Average last frost: May 10 - Jun 1 · Average first frost: Sep 10 - Oct 1

Direct Sow
3 wks before frost
Fall Planting
10 wks before first frost

Southern Oregon Coast (Zones 8b, 9a, 9b)

Average last frost: Mar 5 - Mar 25 · Average first frost: Nov 5 - Nov 25

Direct Sow
3 wks before frost
Fall Planting
10 wks before first frost

Growing Carrots in Oregon

Carrots in Oregon's Climate

Carrots are a cool-season crop in warm climates — sow from September through February and harvest before spring heat makes them tough and bitter. Your mild winter temperatures produce sweet, tender roots without any frost protection. Sandy soils common in the Southeast grow beautiful, straight carrots naturally.

Soil Considerations for Oregon

Rich volcanic soils in Willamette Valley. Dry, alkaline soils east of Cascades. Acidic forest soils on coast. Generally excellent for gardening in valleys. Loose, well-drained soil is especially important for carrots since the edible portion grows underground. If your soil is heavy clay, consider raised beds.

Oregon Climate & Growing Season

Dramatic east-west climate divide. Wet, mild winters west of Cascades. Dry, cold winters east. Year-round gardening possible in mild western valleys.

Growing season length varies across Oregon: Willamette Valley (8a, 8b) has a last frost around Mar 25 - Apr 15, while Southern Oregon Coast (8b, 9a, 9b) sees frost end around Mar 5 - Mar 25. This difference matters for carrots — adjust your planting dates to match your specific region.

Growing Tips

Loose, sandy soil is ideal. Rocky or clay soil causes forked roots. Keep soil consistently moist until seeds germinate.

Companion Planting

Plant carrots alongside these companions for better growth:

Peas Lettuce Tomatoes Onions

Keep carrots away from:

Dill

The Bottom Line

Carrots can be grown successfully across Oregon, but your exact planting dates depend on which region you're in. Willamette Valley gardeners should plan around a Mar 25 - Apr 15 last frost, while those in Southern Oregon Coast can typically plant earlier. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Carrots Growing Guide National planting guide with all states Oregon Planting Calendar All plants for Oregon Carrots in Alabama Alabama planting dates Carrots in Alaska Alaska planting dates Carrots in Arizona Arizona planting dates Carrots in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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