Sullivan's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Sullivan a growing zone designation of 5b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Sullivan's climate. If you are looking for plants suitable for growing in the Sullivan area, head on over to our page on plants that grow well in Sullivan, WI.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

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 Sullivan is in growing zone 5b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Sullivan'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: 5b

Zip Codes: 53178

Longitude: -88.5903

Latitude: 43.0118

Lowest Avg Temperatures (F): -15 to -10