WHAT IS A FROST DATE?

A "frost date" is the average date when the last frost occurs. It is presumed to happen when the minimum daily temperature is 0°C or higher. 

WHY IS IT USEFUL FOR GARDENERS? 

It is a good indication of when to plant your outdoor garden, usually 2 weeks after this date.

It is also a useful tool to know which plants are best to start as indoor seedlings.

Here are some useful frost dates around Canada for Organic farmers and gardeners:

BC
Victoria - April 14
Vancouver - April 21

Alberta
Edmonton - May 15
Calgary - May 29

Saskatchewan
Regina - June 1

Manitoba
Winnipeg - May 21

Ontario
Toronto - May 4
Ottawa - May 13
Thunder Bay - June 6 

Quebec
Quebec - May 17
Montreal - April 26

New Brunswick
Fredericton - May 22

Nova Scotia
Halifax - May 8

PEI
Charlottetown - May 20

Newfoundland
St. John's - June 11

Nunavut
Iqaluit - July 2

Yukon
Yellowknife - May 31