Kansas City, MO Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
USDA Zone 6a
Last Spring Frost
March 30
Safe to transplant after this date
First Fall Frost
November 1
Protect tender plants before this date
Frost-Free Season
216 days
Late March to Mid-November
304 days until last frost in Kansas City — March 30
Kansas City’s zone 6a climate provides a generous 216-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 Kansas City
Lawn Care Timing for Kansas City
Based on Kansas City's USDA zone 6a frost dates: The last frost of March 30 marks when warm-season grasses begin recovering. Apply spring fertilizer in Late March when soil reaches 55°F. The first fall frost of November 1 sets your deadlines — complete overseeding by September 1–October 1 and apply winterizer by Mid-November.
USDA Zone 6a Summary
Seven months frost-free. Transition zone between cool-season and warm-season grasses. Mid-Atlantic states.
Frequently Asked Questions
What is the last frost date in Kansas City, MO?
The average last spring frost in Kansas City is March 30. This is based on USDA zone 6a 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 Kansas City?
Kansas City’s average first fall frost is November 1. This sets deadlines for fall overseeding (must be done 6 weeks before) and winterizer application (by Mid-November).
When should I plant tomatoes in Kansas City?
Transplant tomato seedlings outdoors after March 30. Start seeds indoors Late January. Direct sow warm-season crops after april 7.
When should I overseed my lawn in Kansas City?
The prime overseeding window in Kansas City is September 1–October 1. This ensures warm soil for germination before the first fall frost on November 1.
When should I apply winterizer in Kansas City?
Apply winterizer fertilizer in Kansas City by Mid-November. This high-potassium application hardens grass cell walls before freeze damage. Your first fall frost of November 1 is the hard deadline.