Photo of Notholithocarpus densiflorus foliage by Joseph O'Brien

Photo by Joseph O'Brien

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Notholithocarpus densiflorus

Also Known As

  • Lithocarpus densiflorus
  • Quercus densiflorus
  • Tanbark Oak
  • Tanoak

Plant type

tree

size

  • H: 30'-150'
  • W: 40'

planting zones

  • 6a-10b

More Options

Notholithocarpus densiflorus plant details

Notholithocarpus densiflorus is a broadleaf evergreen tree with blue and green foliage. In spring white flowers emerge followed by brown fruit. Attracts bees and birds making it an excellent addition to pollinator gardens. Grows well with sun - mostly shade and even moisture water. Prefers to be dry in summer. Adapts to various soil conditions. Does well in average and well-drained soil. A good option if you're seeking something verticillium wilt resistant.

CHARACTERISTICS OF Notholithocarpus densiflorus

Plant type: tree
Plant family: fagaceae
Foliage: evergreen blue and green
Mature size: 40 FT wide, 30 FT - 150 FT - tall
Flowers: white blooms in spring

GROWING CONDITIONS for Notholithocarpus densiflorus

USDA Zones: 6a - 10b
Sun exposure: sun - mostly shade
Watering frequency: even moisture
Resistant to: verticillium wilt
Soil needs: average and well-drained

Nursery contributed plant descriptions

A stunning evergreen tree native to California and Southern Oregon. Slow-growing to 75' with beautiful, leathery, toothed leaves which are a deep, dark-green on the top and white beneath, interesting catkins are produced from April-August becoming the wonderful acorns (which take two years to ripen) that were leached and ground into flour by the Native Americans. S/M-D-GDr
Evergreen tree to 150', though usually smaller in garden settings (40-60'), with a moderate growth rate and a stately, solid appearance. Found commonly throughout California as a shrub or small tree in mixed evergreen forests or in association with redwoods or Douglas firs, the tanbark oak is an exceptional native tree that deserves a much more prominent place in California gardens. Mature trees possess furrowed bark on a short gray trunk and distinctive, dark olive-green leaves. The new foliage opens a pale, almost white, lime-green and adds a stunning contrast to the previous year's thick leathery leaves that are glabrous above and rusty tomentose beneath. A good street or lawn tree, its lower branches sometimes touch the ground and the seasonal leaf litter creates a natural mulch at the tree's dripline. Tolerant of shade and needing little water once established, the tan oak does require protection from hot sun in Southern California. An extract from the bark was at one time used to tan cattle hides, hence the common name. Hardy to 0F. Coast ranges, from southern Oregon to Santa Barbara County, California.
This handsome tree is one of the West's most magnificent native broadleaf evergreens. It grows upright, assuming a strongly pyramidal habit, with oak-like leaves that may have tan colored fuzz on their undersides. When mature it produces acorns with interesting frilly burrs in great quantities. Found in the Siskyou/Klamath region of Oregon and California, it will adapt to about anywhere that has a winter rainfall maximum and not too extreme temperatures. It grows splendidly in the Seattle area and some large examples can be found in Seattle and Bremerton. It was known until recently as Lithocarpus densiflorus.

Gardening facts about Notholithocarpus densiflorus plant

How to Grow Notholithocarpus densiflorus

  • Sun Exposure

    • sun - mostly shade
  • Water Needs

    • even moisture
  • Water Needs

    • dry in summer
  • Soil Needs

    • adaptable
    • average
    • well-drained
  • Special Situation

    • verticillium wilt resistant

Features

  • Foliage Color

    • green
    • blue
  • Flower Color

    • white
  • Wildlife

    • birds
    • bees
  • Fruit

    • brown
  • Flower Season

    • spring
  • Foliage Season

    • evergreen

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