SelecTree: Tree Detail

KNOBCONE PINE
Pinus attenuata

Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata Pinus attenuata

Photo Locations: East Cuesta Ridge, San Luis Obispo, CA and UC Berkeley Botanic Garden - Berkeley, CA

General Notes

Very drought tolerant. Variable growth habit.

Native to Southern Oregon and Northern California.

A Pinus attenuata in Shasta County is registered as a California Big Tree. It measures 117 feet high, with a trunk circumference of 135 inches and a crown spread of 66 feet.

Family: Pinaceae

Tree Characteristics

Erect or Spreading and requires ample growing space.

Oval or Rounded Shape.

Has Evergreen foliage.

Height: 60 - 80 feet.

Width: 20 - 25 feet.

Growth Rate: 36 Inches per Year.

Longevity 50 to 150 years.

Leaves Needle, Gray Green or Light Green, No Change, Evergreen.

Flowers Inconspicuous. Flowers in Spring or Summer. Has separate male and female flowers on the same tree (monoecious).

Brown Cone, Very Large (Over 3.00 inches), fruiting in Fall or Winter.

Bark Dark Brown or Purple, Fissured.

Shading Capacity Rated as Dense in Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 2 - 10 and 14 - 21.

USDA Hardiness Zones 7 - 8.

Exposure Full Sun to Partial Shade.

Moist to Dry Soil.

Drought tolerant.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Seaside Tolerance is Good in Mild Zone.

Pests & Disease Information

Resistant to Texas Root Rot and Verticillium. Susceptible to Aphids and Beetle Borers, Pitch Canker.

Health, Safety & Environmental Concerns

Branch Strength Rated as Medium Weak to Medium

Root Damage Potential Rated as Moderate.

Allergy Health Hazard.

Biogenic Emissions considered Moderate.

Attracts Birds and Squirrels.

Not Deer Palatable.

Cite this tree:
SelecTree. "Pinus attenuata Tree Record." 1995-2017. Nov 21, 2017.
< http://selectree.calpoly.edu/tree-detail/pinus-attenuata >

This tree is not part of the SelecTree Nursery Connection. If you would like to see this tree listed, or know of a nursery that sells it, please contact us at ufei@calpoly.edu.