Plants by USDA Zone: Zone 9, 10 and 11 in California

Short answer: most of the plants in our nursery are rated USDA zones 9 through 11, a smaller group is hardy into zone 8, and a handful of agaves and yuccas take zone 7 cold. Every product page lists the zone range and a rated low temperature in degrees Fahrenheit, so you can match a plant to your own winter instead of to a regional average. This guide explains what those numbers mean, what they do not cover, and which plants belong in which band.

What a USDA hardiness zone is

A USDA zone is one number: the average annual minimum winter temperature for a location, in ten degree Fahrenheit bands, split into an a and b half. Zone 9 means an average winter low of 20 to 30 degrees. Zone 10 means 30 to 40. That is the whole definition.

It is a cold survival number and nothing else. It does not describe summer heat, which is the factor that actually limits plant choice in the Antelope Valley and the southern San Joaquin. It does not describe soil, drainage, or how long a cold night lasts. And it is an average, not a floor, so a zone 9 garden will still see a colder winter than average every few years.

California zones at a glance

Zone	Average winter low	Roughly where	What that means for planting
8b	15 to 20 °F	Parts of the high desert and Antelope Valley	Hard agaves and yuccas only. Most aloes need cover.
9a	20 to 25 °F	Much of the high desert, inland valleys	Wide agave and yucca choice, hardier aloes.
9b	25 to 30 °F	Southern San Joaquin Valley, Visalia, Bakersfield	Most of this nursery works. Tropical material needs shelter.
10a and warmer	30 °F and up	Coastal and Southern California suburbs	Nearly everything, including palms and tropicals.

Look up your own ZIP code on the USDA Plant Hardiness Zone Map rather than trusting a regional label. The map was revised in 2023 and a lot of California moved up about half a zone, so an older book or plant tag may be rating your yard one step colder than the current map does.

Plants for zone 8 and colder

This is the smallest group and the one worth being careful about. These are the plants in our nursery rated to roughly 15 degrees Fahrenheit or lower, which covers a normal high desert winter. Agave parryi and Yucca rostrata sit at the hard end of it, and Aspidistra is here for a different reason: it is a cold tolerant shade plant rather than a succulent.

Hardy to zone 8 or colder

Browse the full cold hardy plants group for everything rated for frost.

Plants for zone 9

Zone 9 is the working band for most of inland California, and it is where the bulk of this catalog sits. A zone 9 rating means the plant expects a winter low somewhere between 20 and 30 degrees, which describes Visalia, Bakersfield and much of the Antelope Valley in a normal year. Agaves dominate the group, along with the tougher aloes, dasylirion and several palms.

Rated for zone 9

Pair these with full sun plants if the bed takes all day light, or with xeriscape plants if you are planting for low water.

Plants for zone 10 and 11

These are the frost tender plants: palms, cycads, bromeliads and the softer succulents. They want a winter low above 30 degrees, so in a zone 9 garden they need either a container that can be moved or a genuinely sheltered spot. In zone 10 and warmer they go straight in the ground.

Zone 10 and 11 material

Most of this group is also shade tolerant, and much of it does well in pots and containers, which is the practical way to grow zone 10 plants north of the coast.

Why the zone number is only half the answer

Two gardens in the same zone can get completely different results, and the difference is rarely the plant. Three factors do most of the work.

• Drainage. Cold plus wet kills succulents at temperatures they survive easily in dry ground. Planting slightly proud of finished grade and top dressing with rock does more for real world hardiness than a half zone on a tag.
• Microclimate. A south or west facing wall stores heat all day and releases it overnight. Under an eave or a tree canopy, radiant frost never reaches the plant. Both are worth roughly a half zone, sometimes more.
• Duration. A brief dip to 25 degrees before dawn is a different event from twelve hours below freezing. Desert winters tend to be short and sharp, which many succulents handle better than a long cold valley fog.

Planting into rock, and why it helps in winter

Setting plants into stone rather than bark is the standard treatment here for looks, but the winter argument is the stronger one. A mineral top dressing keeps the crown dry and stops splash from sitting against the stem, which is exactly where cold damage starts. Use decomposed granite or landscape rock, keep it about an inch clear of each stem, and size the quantity with the coverage calculator.

On a slope the same logic applies with more urgency, since a grade sheds water fast and the plants that hold it need to be chosen for spread as well as hardiness. See erosion control plants and our guide to rock for drainage and erosion control.

Frequently asked questions

What USDA zone is my part of California?

Look up your ZIP code on the USDA Plant Hardiness Zone Map. As a rough guide, the Antelope Valley and high desert around Rosamond run about zone 8b to 9a, the southern San Joaquin Valley around Visalia and Bakersfield about 9b, and coastal and Southern California suburbs 10a and warmer. The 2023 revision of the map moved much of the country up about half a zone, so an older reference may put you one step colder than the current map does.

What does a USDA zone actually tell you?

One thing only: the average annual minimum winter temperature. It is a cold survival number. It says nothing about summer heat, humidity, soil, or how long the cold lasts, which is why a plant rated for your zone can still fail in your yard. For succulents in California, winter drainage usually matters more than the zone rating.

Can I grow a zone 10 plant in zone 9?

Often yes, with help. A zone 10 plant in a zone 9 garden needs a warm microclimate: a south or west facing wall that radiates stored heat, overhead cover from a tree or eave that blocks radiant frost, and sharp drainage so the roots are not sitting wet during a cold snap. Expect occasional tip damage in a hard winter, and expect to lose it in an exceptional one.

Are succulents cold hardy?

Some are and some are not, and the range is wide. A few agaves and yuccas take temperatures near zero degrees Fahrenheit, while many aloes and most of the tropical material are damaged in the mid to high twenties. Every product page here lists a rated low temperature in degrees Fahrenheit alongside the USDA zone range, so you can check rather than assume.

Does drainage change how much cold a plant survives?

Yes, more than most people expect. Cold plus wet soil rots a succulent crown at temperatures it would shrug off in dry ground. That is why a gravel or decomposed granite top dressing, kept clear of the stem, and planting slightly proud of finished grade both buy real hardiness that no zone chart accounts for.

Shop by zone and condition

Filter the whole nursery by USDA zone, sun exposure, mature size and water needs in the sidebar on nursery plants, or start from cold hardy plants, full sun plants, shade plants or xeriscape plants. For care by genus, read agave plant care, aloe plant care and cycad plant care.