Plant Hardiness Zones in Canada

The Plant Hardiness Zones map is divided into nine major zones,the coldest is 0 and the warmest is 8.There are some sub-zones as well.The coldest is 0 and the warmest is 8.It is based on the average climatic conditions of each area.The original one was created by Agriculture Canada Scientist in 1967 and was based on Canadian plant survival data and climate variables,like minimum winter temperatures,length of frost free periods,summer rainfall and etc.This is one of the most important factors when want to purchase any plant or seeds.It should be considered that whether any plant will survive under some particular factors of climate.The Plant Hardiness Zones in Canada was revised in 2000 and the effect of elevation was added to the equation.As a general rule, in Zone 6, you should plant plants hardy in Zone 6 and up to three zones colder. Plants hardy to Zone 8 would never survive the winter in your yard. So, although the zone map is a useful starting point for all of us, consider your own yard’s conditions and your area’s weather fluctuations when choosing yearly plantings.