Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Duncan, OK, based on the USDA Hardiness Zone 7b.
On this page:
Duncan, OK Frost Dates & Growing Season
Last Spring Frost Date for Duncan, OK
The average last frost date in spring for Duncan is April 2nd. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until April 16th 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 Duncan, OK
The average first frost date in fall for Duncan 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 Duncan, OK
Based on historical frost data, the estimated growing season length in Duncan is approximately 217 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.
Duncan, OK Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Duncan, OK Monthly Planting Recommendations
January
In January, recommended activities include starting Leek seeds indoors (from January 22nd to February 5th), starting Snapdragon seeds indoors (from January 22nd to February 5th), and starting French Lavender seeds indoors (from January 22nd to February 5th).
February
In February, recommended activities include starting Black Eyed Susan seeds indoors (from February 5th to February 19th), direct sowing Spinach (from February 19th to March 5th), and starting Basil seeds indoors (from February 19th to March 5th).
March
In March, recommended activities include direct sowing Parsley (from March 5th to March 19th), direct sowing Lentil (from March 19th to April 2nd), and direct sowing Hyssop (from March 19th to April 2nd).
April
In April, recommended activities include direct sowing Black Bean (from April 16th to April 30th), direct sowing Chia (from April 16th to April 30th), and direct sowing Butterfly Pea (from April 16th to April 30th).