I am in Zone 6 and the Average Last Frost: 04/15, Tax Deadline Day.
If I can, I’ll try to get in the garden even earlier and plant peas and potatoes on St Patricks Day.
The really smart thing to do is wait until May Day, 5/1 to plant plants.
Last Frost Dates
Zone 1: June1 – June 30
Zone 2: May 1 – May 31
Zone 3: May 1 – May31
Zone 4: May 1 – May31
Zone 5: March 30 – April30
Zone 6: March 30 – April30
Zone 7: March 30 – April30
Zone 8: February 28 – March 30
Zone 9: January 30 – February 28
Zone 10: January 1 – January 31
Zone 11 Frost Free Year Round
Burpee has some very helpful information for new and experienced gardeners.
Burpee Growing Zone Information Burpee Growing Calendar by zip code
US National Arboretum “Web Version” of the USDA Plant Hardiness Zone Map
I think the line between 6a and 6b goes right through my garden. Depending on the luck I’m having at the time, my answer could be different to the question, which zone do you live in, 6a or 6b?”