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


Brass Watering Can

Fiskars Garden Harvest Basket

Metal Arbor Trellis

Worm Composting Kit

Brass Decorative Faucet Handle
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 New Haven is in growing zone 5a this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for New Haven'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: 50461
Longitude: -92.6422
Latitude: 43.2839
Lowest Avg Temperatures (F): -20 to -15

Stainless Steel Garden Tool Set

Shiitake Mushroom Kit

Metal Seed Storage Box

Steel Hori Hori Weeding Knife
