Ontario's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Ontario a growing zone designation of 4b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Ontario's climate. If you are looking for plants suitable for growing in the Ontario area, head on over to our page on plants that grow well in Ontario, WI.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Understanding your growing zone is very important because it is a measure of the lowest temperature that a plant can survive, helping you to decide what plants would grow best in your particular climate. Since Ontario is in growing zone 4b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Ontario's climate should be chosen with this in mind or plants should be moved inside to keep their core temperature in the right range if necessary.

USDA Growing Zone: 4b

Zip Codes: 54651

Longitude: -90.5941

Latitude: 43.7222

Lowest Avg Temperatures (F): -25 to -20