Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

Juniperus californica (California Juniper) is a species in the Cupressaceae (Cypress) family native to southwestern North America; as the name implies, it is mainly found in California, but also extends through most of Baja California, and a short distance into southern Nevada and western Arizona. It grows at moderate altitudes of 750-1,600 meter. It is a shrub or small tree reaching 3-8 meter (rarely to 10 meter) tall. It is much branched from the base. The shoots are fairly thick compared to most junipers, 1.5-2 millimeter diameter. The leaves are arranged in opposite decussate pairs or whorls of three; the adult leaves are scale-like, 1-2 millimeter long (to 5 millimeter on lead shoots) and 1-1.5 millimeter broad. The juvenile leaves (on young seedlings only) are needle-like, 5-10 millimeter long. The cones are berry-like, 7-13 millimeter in diameter, blue-brown with a whitish waxy bloom, and contain a single seed (rarely two or three); they are mature in about 8-9 months. The male cones are 2-4 millimeter long, and shed their pollen in early spring. It is largely dioecious producing cones of only one sex, but around 2% of plants are monoecious, with both sexes on the same plant. The bark is typically thin and appears to be "shredded." In the garden this plant is tolerant of many soils and requires minimal water once established. It becomes wider than tall so give it plenty of room.

Plant type

Tree

Size

10 - 26 ft Tall
20 ft Wide

Form

Rounded

Growth rate

Moderate, Slow

Dormancy

Evergreen

Fragrance

Pleasant

Special uses

Bank stabilization, Hedge

Sun

Full Sun, Partial Shade

Water

Low, Very Low

Summer irrigation

Max 1x / month once established

Ease of care

Moderate

Cold tolerance

Tolerates cold to 10° F

Soil drainage

Fast, Medium

Soil description

Typically coarse, well drained and low nutrient soil such as decomposed granite.
Soil PH: 7.0 - 8.0

Maintenance

Prune in winter when wood boring insects are less active.

Sunset Zones

3, 6, 7*, 8, 9, 10, 11, 12, 14*, 15*, 16*, 17, 18*, 19*, 20*, 21*, 22*, 23*, 24

Site type

Dry slopes and flats of high desert in the south to somewhat more mesic slopes of the Coast Ranges and Sierras

Plant communities

Foothill Woodland, Joshua Tree Woodland, Pinyon-Juniper Woodland

In the wild it grows with many companions depending on location. In the garden it needs plenty of room and does not allow understory plants, but can be planted adjacent to Big Sagebrush (Artemisia tridentata), Buckwheat (Eriogonum spp.), Apache Plume (Fallugia paradoxa), Flannelbush (Fremontodendron californicum), Yucca (Hesperoyucca spp. or Yucca spp.), Antelope Brush (Purshia tridentata var. glandulosa), and various cactus species

Caterpillars
Butterflies

Butterflies and moths supported

4 confirmed and 23 likely

Confirmed Likely

Olive Hairstreak

Callophrys gryneus

Gloveria arizonensis

Lithophane subtilis

Sequoia Sphinx Moth

Sphinx sequoiae