What Growing Zone Is Diamond Bar?

Our records indicate the United States Department of Agriculture has given Diamond Bar a growing zone designation of 10a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Diamond Bar's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Diamond Bar's weather data from 1991 - 2020 in their analysis.

map of growing zone 10a (Northern California)map of growing zone 10aLatest CA growing zone map

If you are looking for plants suitable for growing in the Diamond Bar area, head on over to our page on plants that grow well in Diamond Bar, CA.

Hydroponic Garden Grow Kit

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Deluxe Plastic Watering Can

Deluxe Plastic Watering Can

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

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.
Cluck Around Sign

Cluck Around Sign

Whimsical sign for your chicken coop area.
Hoeing Ain't Easy Garden Sign

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.
map of growing zone 10a (Northern California)map of growing zone 10aLatest CA growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Diamond Bar is in growing zone 10a this means that plants there can survive temperatures as low as 30 to 35 degrees Fahrenheit. Plants for Diamond Bar'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 map of the United States

Some zones may have been changed by the USDA as of 2023. To see if the Diamond Bar area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

map of usda hardiness zone changes from 2012 to 2023Half zone changes from 2012 to 2023

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Diamond Bar, CA.

The USDA hardiness zone is 10a for Diamond Bar. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Diamond Bar's Growing Zone Details

USDA Growing Zone: 10a

Zip Codes: 91789, 91765

Longitude: -117.8161

Latitude: 33.9992

Lowest Avg Temperatures (F): 30 to 35

Brass Watering Can

Brass Watering Can

Elegant brass watering can with classic design and durability.
Stainless Steel Garden Tool Set

Stainless Steel Garden Tool Set

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

Worm Composting Kit

Complete kit for starting your own worm composting system.
Fiskars Garden Harvest Basket

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.
Seed Starting Trays

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Map of the Diamond Bar Area

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Hydroponic Garden Grow Kit

Hydroponic Garden Grow Kit

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

Worm Composting Kit

Complete kit for starting your own worm composting system.
Hoeing Ain't Easy Garden Sign

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.
Brass Watering Can

Brass Watering Can

Elegant brass watering can with classic design and durability.
Reusable Grow Bags

Reusable Grow Bags

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

Plants For Other States

Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.

Alaska Alabama Arkansas Arizona California Colorado Connecticut Delaware Florida Georgia Hawaii Iowa Idaho Illinois Indiana Kansas Kentucky Louisiana Massachusetts Maryland Maine Michigan Minnesota Missouri Mississippi Montana North Carolina North Dakota Nebraska New Hampshire New Jersey New Mexico Nevada New York Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Virginia Vermont Washington Wisconsin West Virginia Wyoming
Fiskars Garden Harvest Basket

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.
Deluxe Plastic Watering Can

Deluxe Plastic Watering Can

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

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.
Hoeing Ain't Easy Garden Sign

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.
Hydroponic Garden Grow Kit

Hydroponic Garden Grow Kit

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

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