Elma's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Elma 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 Elma's climate. If you are looking for plants suitable for growing in the Elma area, head on over to our page on plants that grow well in Elma, IA.

Worm Composting Kit

Complete kit for starting your own worm composting system.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Hydroponic Garden Grow Kit

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

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 Elma is in growing zone 4b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Elma'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: 50628

Longitude: -92.4387

Latitude: 43.2457

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