Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Rock river, WY, based on the USDA Hardiness Zone 4b.
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Rock river, WY Frost Dates & Growing Season
Last Spring Frost Date for Rock river, WY
The average last frost date in spring for Rock river is June 15th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 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 Rock river, WY
The average first frost date in fall for Rock river is September 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 Rock river, WY
Based on historical frost data, the estimated growing season length in Rock river is approximately 87 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.
Rock river, WY Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Rock river, WY Monthly Planting Recommendations
April
In April, recommended activities include starting Ground Cherry seeds indoors (from April 20th to May 4th), starting Tomatillo seeds indoors (from April 20th to May 4th), and starting Petunia seeds indoors (from April 6th to April 20th).
May
In May, recommended activities include starting Basil seeds indoors (from May 4th to May 18th), starting Cantaloupe seeds indoors (from May 18th to June 1st), and direct sowing Arugula (from May 18th to June 1st).
June
In June, recommended activities include direct sowing Cantaloupe (from June 22nd to July 6th), direct sowing Beet (from June 1st to June 15th), and direct sowing Cosmos (from June 22nd to June 29th).