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


Brass Decorative Faucet Handle

Cluck Around Sign

Raised Garden Planter

Wooden Chicken Coop

Large Greenhouse Kit
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 Longmont is in growing zone 5b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Longmont'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: 80501, 80503, 80504
Longitude: -105.1005
Latitude: 40.1686
Lowest Avg Temperatures (F): -15 to -10

Brass Watering Can

Metal Seed Storage Box

Raised Garden Planter

Self Watering Plant Pots
