Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Harbor, OR, based on the USDA Hardiness Zone 9b.
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Harbor, OR Frost Dates & Growing Season
Last Spring Frost Date for Harbor, OR
The average last frost date in spring for Harbor is May 1st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 15th 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 Harbor, OR
The average first frost date in fall for Harbor is December 10th. 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 Harbor, OR
Based on historical frost data, the estimated growing season length in Harbor is approximately 223 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.
Harbor, OR Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Harbor, OR Monthly Planting Recommendations
February
In February, recommended activities include starting Lavender seeds indoors (from February 20th to March 6th), starting Artichoke seeds indoors (from February 20th to March 6th), and starting Leek seeds indoors (from February 20th to March 6th).
March
In March, recommended activities include starting Oregano seeds indoors (from March 6th to March 20th), starting Cauliflower seeds indoors (from March 6th to March 20th), and starting Stevia seeds indoors (from March 6th to March 20th).
April
In April, recommended activities include direct sowing Hyssop (from April 17th to May 1st), direct sowing German Chamomile (from April 17th to May 1st), and direct sowing Swiss Chard (from April 17th to May 1st).
May
In May, recommended activities include direct sowing Anise (from May 8th to May 15th), direct sowing Okra (from May 15th to May 29th), and direct sowing Melon (from May 15th to May 29th).