Alum Rock's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Alum Rock a growing zone designation of 9b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Alum Rock's climate. If you are looking for plants suitable for growing in the Alum Rock area, head on over to our page on plants that grow well in Alum Rock, CA.

Stainless Steel Garden Tool Set

Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.

Reusable Grow Bags

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

Raised Garden Planter

Elevated planter for easy access and better drainage.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

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 Alum Rock is in growing zone 9b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Alum Rock'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: 9b

Zip Codes: 95127

Longitude: -121.8238

Latitude: 37.3694

Lowest Avg Temperatures (F): 25 to 30