Barnum's Hardiness Zone

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

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Raised Garden Bed Kit

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

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

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

Zip Codes: 50518

Longitude: -94.3657

Latitude: 42.5062

Lowest Avg Temperatures (F): -20 to -15