What Growing Zone Is Signal Hill?

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

map of growing zone 10b (Northern California)map of growing zone 10bLatest CA growing zone map

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

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Stainless Steel Garden Tool Set

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Shiitake Mushroom Kit

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.
Metal Arbor Trellis

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.
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Hydroponic Garden Grow Kit

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

Brass Watering Can

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map of growing zone 10b (Northern California)map of growing zone 10bLatest 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 Signal Hill is in growing zone 10b this means that plants there can survive temperatures as low as 35 to 40 degrees Fahrenheit. Plants for Signal Hill'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 Signal Hill 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 Signal Hill, CA.

The USDA hardiness zone is 10b for Signal Hill. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Signal Hill's Growing Zone Details

USDA Growing Zone: 10b

Zip Codes: 90755

Longitude: -118.1681

Latitude: 33.803

Lowest Avg Temperatures (F): 35 to 40

Shiitake Mushroom Kit

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.
Metal Arbor Trellis

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.
Metal Seed Storage Box

Metal Seed Storage Box

Organized storage solution for your seed collection.
Large Greenhouse Kit

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.
Small Greenhouse Kit

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.

Map of the Signal Hill 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

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Small Greenhouse Kit

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.
Hoeing Ain't Easy Garden Sign

Hoeing Ain't Easy Garden Sign

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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.

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Hoeing Ain't Easy Garden Sign

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.
Large Greenhouse Kit

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.
Raised Garden Planter

Raised Garden Planter

Elevated planter for easy access and better drainage.
Hydroponic Garden Grow Kit

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Steel Hori Hori Weeding Knife

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

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