What Growing Zone Is Mount Bullion?

Our records indicate the United States Department of Agriculture has given Mount Bullion a growing zone designation of 9a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Mount Bullion's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Mount Bullion's weather data from 1991 - 2020 in their analysis.

map of growing zone 9a (Northern California)map of growing zone 9aLatest CA growing zone map

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

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.
Worm Composting Kit

Worm Composting Kit

Complete kit for starting your own worm composting system.
Steel Hori Hori Weeding Knife

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.
Hydroponic Garden Grow Kit

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
map of growing zone 9a (Northern California)map of growing zone 9aLatest 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 Mount Bullion is in growing zone 9a this means that plants there can survive temperatures as low as 20 to 25 degrees Fahrenheit. Plants for Mount Bullion'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 Mount Bullion 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 Mount Bullion, CA.

The USDA hardiness zone is 9a for Mount Bullion. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Mount Bullion's Growing Zone Details

USDA Growing Zone: 9a

Zip Codes: 95338

Longitude: -120.0437

Latitude: 37.5082

Lowest Avg Temperatures (F): 20 to 25

Metal Arbor Trellis

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.
Worm Composting Kit

Worm Composting Kit

Complete kit for starting your own worm composting system.
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.
Reusable Grow Bags

Reusable Grow Bags

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

Map of the Mount Bullion Area

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Deluxe Plastic Watering Can

Deluxe Plastic Watering Can

High-capacity watering can with comfortable grip and precise spout.
Steel Hori Hori Weeding Knife

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.
Self Watering Plant Pots

Self Watering Plant Pots

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Shiitake Mushroom Kit

Shiitake Mushroom Kit

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Brass Decorative Faucet Handle

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

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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Fiskars Garden Harvest Basket

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.
Large Greenhouse Kit

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.
Deluxe Plastic Watering Can

Deluxe Plastic Watering Can

High-capacity watering can with comfortable grip and precise spout.
Metal Seed Storage Box

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Organized storage solution for your seed collection.
Cluck Around Sign

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