Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Lake oswego, OR, based on the USDA Hardiness Zone 8b.
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Lake oswego, OR Frost Dates & Growing Season
Last Spring Frost Date for Lake oswego, OR
The average last frost date in spring for Lake oswego is April 15th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until April 29th 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 Lake oswego, OR
The average first frost date in fall for Lake oswego is November 5th. 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 Lake oswego, OR
Based on historical frost data, the estimated growing season length in Lake oswego is approximately 204 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.
Lake oswego, OR Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Lake oswego, OR Monthly Planting Recommendations
February
In February, recommended activities include starting Tomato seeds indoors (from February 18th to March 4th), starting Rosemary seeds indoors (from February 4th to February 18th), and starting Petunia seeds indoors (from February 4th to February 18th).
March
In March, recommended activities include direct sowing Parsley (from March 18th to April 1st), direct sowing Sweet Pea (from March 18th to April 1st), and direct sowing Carrot (from March 25th to April 8th).
April
In April, recommended activities include direct sowing Alyssum (from April 1st to April 15th), direct sowing Lentil (from April 1st to April 15th), and direct sowing Zinnia (from April 22nd to May 6th).