Mobile, AL Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
USDA Zone 8b
Last Spring Frost
February 1
Safe to transplant after this date
First Fall Frost
December 15
Protect tender plants before this date
Frost-Free Season
317 days
February to December
246 days until last frost in Mobile — February 1
Mobile’s zone 8b climate means frost is a minor consideration. Ten and a half months frost-free. Most warm-season grasses stay green almost year-round. Rather than a single planting season, Mobile gardeners work almost year-round.
Complete Planting Calendar for Mobile
Lawn Care Timing for Mobile
Based on Mobile's USDA zone 8b frost dates: The last frost of February 1 marks when warm-season grasses begin recovering. Apply spring fertilizer in February when soil reaches 55°F. The first fall frost of December 15 sets your deadlines — complete overseeding by November 1–December 1 and apply winterizer by Late December.
USDA Zone 8b Summary
Ten and a half months frost-free. Most warm-season grasses stay green almost year-round.
Frequently Asked Questions
What is the last frost date in Mobile, AL?
The average last spring frost in Mobile is February 1. This is based on USDA zone 8b 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 Mobile?
Mobile’s average first fall frost is December 15. This sets deadlines for fall overseeding (must be done when temperatures cool) and winterizer application (by Late December).
When should I plant tomatoes in Mobile?
Transplant tomato seedlings outdoors after February 1. Start seeds indoors October (for winter garden). Direct sow warm-season crops after february 8.
When should I overseed my lawn in Mobile?
The prime overseeding window in Mobile is November 1–December 1. This ensures warm soil for germination before the first fall frost on December 15.
When should I apply winterizer in Mobile?
Apply winterizer fertilizer in Mobile by Late December. This high-potassium application hardens grass cell walls before freeze damage. Your first fall frost of December 15 is the hard deadline.