Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Monmouth, OR, based on the USDA Hardiness Zone 8b.
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Monmouth, OR Frost Dates & Growing Season
Last Spring Frost Date for Monmouth, OR
The average last frost date in spring for Monmouth is April 20th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 4th 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 Monmouth, OR
The average first frost date in fall for Monmouth is November 1st. 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 Monmouth, OR
Based on historical frost data, the estimated growing season length in Monmouth is approximately 195 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.
Monmouth, OR Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Monmouth, OR Monthly Planting Recommendations
February
In February, recommended activities include starting Ground Cherry seeds indoors (from February 23rd to March 9th), starting Oregano seeds indoors (from February 23rd to March 9th), and starting Lavender seeds indoors (from February 9th to February 23rd).
March
In March, recommended activities include direct sowing Carrot (from March 30th to April 13th), direct sowing Garden Cress (from March 23rd to April 6th), and starting Pumpkin seeds indoors (from March 30th to April 6th).
April
In April, recommended activities include direct sowing Babys Breath (from April 20th to May 4th), direct sowing Beet (from April 6th to April 20th), and direct sowing Alyssum (from April 6th to April 20th).
May
In May, recommended activities include direct sowing Black Bean (from May 4th to May 18th), direct sowing Lima Bean (from May 4th to May 18th), and direct sowing Corn (from May 4th to May 11th).