Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Oroville, WA, based on the USDA Hardiness Zone 6b.
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Oroville, WA Frost Dates & Growing Season
Last Spring Frost Date for Oroville, WA
The average last frost date in spring for Oroville is May 6th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 20th before moving plants outdoors. Waiting these extra few weeks significantly reduces the risk of a late freeze damaging young transplants.
First Fall Frost Date for Oroville, WA
The average first frost date in fall for Oroville is October 4th. This date marks the approximate end of the growing season for tender plants. Gardeners should plan to harvest frost-sensitive vegetables or provide heavy protection (such as row covers) before this date to avoid crop loss.
Growing Season Length in Oroville, WA
Based on historical frost data, the estimated growing season length in Oroville is approximately 151 days. This duration determines which vegetable varieties have enough time to reach maturity before the winter cold sets in. Short-season varieties are recommended for crops that require a longer warm period.
Please note: These dates are climatological averages. Actual weather conditions vary by year. Always check the local 10-day forecast before planting.
Oroville, WA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Oroville, WA Monthly Planting Recommendations
February
In February, recommended activities include starting Impatiens seeds indoors (from February 25th to March 11th), starting Petunia seeds indoors (from February 25th to March 11th), and starting Onion seeds indoors (from February 25th to March 11th).
March
In March, recommended activities include starting Black Eyed Susan seeds indoors (from March 11th to March 25th), direct sowing Spinach (from March 25th to April 8th), and starting Broccoli seeds indoors (from March 11th to March 25th).
April
In April, recommended activities include direct sowing Chervil (from April 8th to April 22nd), direct sowing Beet (from April 22nd to May 6th), and direct sowing Garden Cress (from April 8th to April 22nd).
May
In May, recommended activities include direct sowing Cantaloupe (from May 13th to May 27th), direct sowing Morning Glory (from May 13th to May 27th), and direct sowing Pumpkin (from May 13th to May 27th).