Frost Date Lookup

Select Your USDA Hardiness Zone

-- Select Zone -- Zone 3a (-40 to -35F) Zone 3b (-35 to -30F) Zone 4a (-30 to -25F) Zone 4b (-25 to -20F) Zone 5a (-20 to -15F) Zone 5b (-15 to -10F) Zone 6a (-10 to -5F) - SW Michigan Zone 6b (-5 to 0F) Zone 7a (0 to 5F) Zone 7b (5 to 10F) Zone 8a (10 to 15F)

Michigan Frost Quick Guide

Most of Southwest Michigan is Zone 6a. Here's what that means:

• Last spring frost: around April 30
• First fall frost: around October 5
• Growing season: ~158 days
• Start seeds indoors: 6-8 weeks before last frost (March 5-19)
• Safe transplant: 2 weeks after last frost (May 14)