Clarksville, TN Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
USDA Zone 7a
Last Spring Frost
March 15
Safe to transplant after this date
First Fall Frost
November 15
Protect tender plants before this date
Frost-Free Season
245 days
Mid-March to Late November
289 days until last frost in Clarksville — March 15
Clarksville’s zone 7a climate provides a generous 245-day frost-free window — long enough for a wide variety of vegetables and excellent conditions for both cool-season and warm-season lawn grasses.
Complete Planting Calendar for Clarksville
Lawn Care Timing for Clarksville
Based on Clarksville's USDA zone 7a frost dates: The last frost of March 15 marks when warm-season grasses begin recovering. Apply spring fertilizer in Mid-March when soil reaches 55°F. The first fall frost of November 15 sets your deadlines — complete overseeding by September 15–October 15 and apply winterizer by Late November.
USDA Zone 7a Summary
Eight months frost-free. Warm-season grasses dominate but cool-season grasses survive winter. Nashville, Oklahoma City area.
Frequently Asked Questions
What is the last frost date in Clarksville, TN?
The average last spring frost in Clarksville is March 15. This is based on USDA zone 7a historical averages. Plan transplanting and spring lawn care around this date — wait 2 weeks after for frost-sensitive plantings.
When is the first fall frost in Clarksville?
Clarksville’s average first fall frost is November 15. This sets deadlines for fall overseeding (must be done 6 weeks before) and winterizer application (by Late November).
When should I plant tomatoes in Clarksville?
Transplant tomato seedlings outdoors after March 15. Start seeds indoors Late December. Direct sow warm-season crops after march 22.
When should I overseed my lawn in Clarksville?
The prime overseeding window in Clarksville is September 15–October 15. This ensures warm soil for germination before the first fall frost on November 15.
When should I apply winterizer in Clarksville?
Apply winterizer fertilizer in Clarksville by Late November. This high-potassium application hardens grass cell walls before freeze damage. Your first fall frost of November 15 is the hard deadline.