Keizer Vegetable Planting Calendar | Urban Farmer

Grow with confidence

Keizer Vegetable Planting Calendar

Use Keizer climate patterns to see this month’s garden tasks and crop-by-crop planting windows for the lower Willamette Valley and Keizer metro.

See What to Plant NowView Planting Dates
Official 2023 USDA Oregon Plant Hardiness Zone Map
USDA Zones 8bMost Keizer neighborhoods fall in USDA Zones 8b
Last spring frostTypical date: April 1
First fall frostTypical date: November 1
Cool season

Plant through winter

Broccoli, lettuce, peas, carrots, radishes and leafy greens perform best from fall through early spring.

Warm season

Use spring warmth

Use the short warm season efficiently: start tender crops indoors, wait for warm soil before planting outside, and sow hardy roots and greens again for fall harvests.

Late summer

Restart the cool garden

Begin fall brassicas indoors and prepare beds for direct-sown roots and greens as temperatures moderate.

Local dates, crop by crop

Keizer Planting Dates

Choose a season and search for a crop to see when to start seeds indoors, move plants outside, direct sow and finish planting in the Keizer area.

Keizer–Marion CountyUSDA Zones 8b · typical last frost April 1 · typical first frost November 1

Spring planting

Planting Dates for Spring

Dates use the central Willamette Valley climate timing. Cool, wet springs, warm dry summers, valley fog, and local soil drainage can shift planting and harvest windows. Always check soil temperature and the 10-day forecast before planting.

Crop Start seeds indoors Transplant or plant outdoors Direct sow outdoors Last recommended planting Shop

Use the dates with confidence

How to Read This Calendar

1

Start indoors

Sow in trays under strong light. The window is timed so seedlings reach transplant size without becoming root-bound.

2

Transplant or plant

Harden seedlings off for about a week. Perennial crowns, sets and seed potatoes are included in this column.

3

Direct sow

Plant seed directly into prepared soil. Cool-season crops can begin before frost; heat-loving crops need warm soil.

4

Last planting

This is the practical end of the selected window—not a guarantee. Variety maturity and unusual weather can move it.

Keep soil working after harvest

Fall Cover Crop Planting Calendar

These windows are calculated from this city’s approximate first fall frost. Sow into an open bed after harvesting vegetables, then follow the selected crop’s product directions.

Cover crop Best for Approx. planting window Winter behavior
Buckwheat Quick biomass · pollinators Sep 1–Sep 15 Frost-killed
Oats Biomass · nutrient capture Sep 1–Sep 29 Usually winter-killed
Field Peas Nitrogen · cool-season growth Sep 1–Sep 29 Often winter-killed
Daikon Radish Compaction · nutrient capture Sep 1–Sep 29 Usually winter-killed
Crimson Clover Nitrogen · pollinators Sep 15–Sep 29 Overwinters where adapted
Annual Ryegrass Roots · erosion control Sep 15–Oct 13 Manage before seed set
Hairy Vetch Nitrogen · spring biomass Sep 29–Oct 13 Overwinters in many areas
Cereal Rye Erosion · weeds · biomass Sep 29–Oct 27 Very winter-hardy
Winter Wheat Erosion · nutrient capture Sep 29–Oct 27 Winter-hardy
Shop Cover CropsCompare Cover CropsCover Crop Learning Center

Planting windows are planning estimates. Check the product page for seeding rate, regional adaptation, inoculation needs, and termination timing.

Keizer soil checkpoints

Let Soil Temperature Be the Final Check

Calendar dates start the conversation. A simple soil thermometer helps confirm that the seedbed is actually ready.

40–50°FPeas, spinach, radishes and other hardy crops
55–60°FBeans, corn and many moderately warm crops
65°F+Cucumbers, squash, melons, okra and other heat lovers
Current Keizer soil temperatureLoading…Modeled near 2½ inches deep
Checking current conditions

Use this modeled reading as a local reference, then confirm conditions in your own garden with a soil thermometer.

Weather data by Open-Meteo

Selected for the current planting window

Seeds to Plant Now

References: Oregon State University Extension Vegetable Gardening in Oregon (EC 871), Growing Your Own (EM 9027), and regional planting calendars; USDA 2023 Plant Hardiness Zone Map; and Open-Meteo modeled soil-temperature data.