Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Greenhorn, OR, based on the USDA Hardiness Zone 5b.
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Greenhorn, OR Frost Dates & Growing Season
Last Spring Frost Date for Greenhorn, OR
The average last frost date in spring for Greenhorn is July 10th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until July 24th 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 Greenhorn, OR
The average first frost date in fall for Greenhorn is August 25th. 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 Greenhorn, OR
Based on historical frost data, the estimated growing season length in Greenhorn is approximately 46 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.
Greenhorn, OR Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Greenhorn, OR Monthly Planting Recommendations
May
In May, recommended activities include direct sowing Spinach (from May 29th to June 12th).
June
In June, recommended activities include direct sowing Mustard (from June 12th to June 26th), direct sowing Arugula (from June 12th to June 26th), and direct sowing Lettuce (from June 12th to June 26th).
July
In July, recommended activities include direct sowing Fenugreek (from July 10th to July 24th).