Onawa's Hardiness Zone

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

Reusable Grow Bags

Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Deluxe Plastic Watering Can

High-capacity watering can with comfortable grip and precise spout.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

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 Onawa is in growing zone 5a this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Onawa'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: 51040

Longitude: -96.0909

Latitude: 42.0265

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