Types of Oak Trees: Red Oaks, White Oaks, and the Ones Worth Planting

Every oak tree belongs to one of two big groups, and you can sort most of them in ten seconds. Red oaks have pointed leaf lobes with a tiny bristle at each tip. White oaks have rounded lobes and no bristles. The acorns confirm it: white oak acorns mature in their first year and red oak acorns take two, so a red oak branch often carries small first-year acorns next to ripe ones.

There are about 500 species of oak trees and shrubs worldwide, and 91 are native to the United States. California also has a third, smaller group of intermediate oaks, and canyon live oak is the one you’ll meet. Hybrids only form within a group, which is why a valley oak will cross with a blue oak and never with a coast live oak.

Oak wilt hits the red group hardest, and sudden oak death attacks California’s red and intermediate oaks while the white group resists it. Both are covered with the other common oak diseases. Below are 16 oaks: the California natives first, then the eastern oaks that show up at nurseries, then two imported evergreen oaks that do well in Sacramento. If you’re still deciding between an oak and something else entirely, start with our overview of shade, flowering, and evergreen trees.

Quick ID: 16 types of oak trees compared

Oak	Group	Leaf	Mature size (H x W)	Zones	Where it fits
Valley oak (Q. lobata)	White	Deep rounded lobes, deciduous	50-80 x 50-80 ft	7-9	Big Central Valley lots
Coast live oak (Q. agrifolia)	Red	Cupped, spiny, evergreen	40-70 x 30-70 ft	S 7-9, 14	Coastal and Bay Area yards
Blue oak (Q. douglasii)	White	Wavy, blue-green, deciduous	45-60 x 40-60 ft	S 7-9, 14	Dry foothill lots, no lawn
Interior live oak (Q. wislizeni)	Red	Flat, glossy, evergreen	45-65 x 50-60 ft	S 7-9, 14	Year-round Sacramento shade
Oregon white oak (Q. garryana)	White	5-9 rounded lobes, deciduous	25-65 ft tall	Not rated	North Coast, Pacific Northwest
Canyon live oak (Q. chrysolepis)	Intermediate	Smooth and spiny on one branch, evergreen	20-80 x 30-60 ft	7-9	Slopes and hillsides
White oak (Q. alba)	White	5-9 rounded, finger-like lobes	50-135 x 50-80 ft	3-9	Large eastern properties
Northern red oak (Q. rubra)	Red	7-11 bristle-tipped lobes	50-70 x 50-75 ft	4-8	Eastern shade tree
Pin oak (Q. palustris)	Red	5 deeply cut, bristle-tipped lobes	50-70 x 40-60 ft	4-8	Acidic, wet soil only
Bur oak (Q. macrocarpa)	White	Huge, waisted, rounded lobes	70-80 x 70-80 ft	3-8	Prairie, clay, alkaline soil
Swamp white oak (Q. bicolor)	White	Shallow lobes, silver underside	50-60 x 50-60 ft	4-8	Low, wet spots
Willow oak (Q. phellos)	Red	Narrow, willow-like, unlobed	40-75 x 25-50 ft	5-9	Streets and tidy lawns
Southern live oak (Q. virginiana)	Live oak, white side	Small, oblong, evergreen	40-80 x 30-100 ft	8-10	Huge lots in mild winters
Shumard oak (Q. shumardii)	Red	2-4 pairs of bristle-tipped lobes	50-70 x 30-40 ft	5-9	Hot, dry urban yards
Cork oak (Q. suber)	Other (Mediterranean)	Leathery, gray underside, evergreen	50-70 x 50-70 ft	8-10	Low-water Sacramento shade
Holly oak (Q. ilex)	Other (Mediterranean)	Dark, dense, evergreen	50-70 x 50-60 ft	S 7-9, 14	Screens and dense shade

Zones are USDA zones from NC State Extension. “S” marks Sunset climate zones from the Sacramento Tree Foundation, used for oaks NC State doesn’t rate. Sacramento-area sizes come from the Sacramento Tree Foundation where it lists the tree.

California native oaks

The Sacramento Tree Foundation lists three oaks native to the Sacramento region: valley oak, blue oak, and interior live oak. Coast live oak, Oregon white oak, and canyon live oak are California natives from the coast, the north, and the hills. All six are adapted to dry summers, and that one fact drives how you care for them. For redbud, buckeye, toyon, and the other native trees beyond oaks, see the full California roundup.

Valley oak (Quercus lobata)

The big one. Valley oak is the largest of the California oaks, capable of 100 feet and 600 years, with a trunk up to 10 feet across. In a Sacramento yard, plan on 50 to 80 feet tall and just as wide.

How to identify it: Leaves run 2 to 4 inches with 9 to 11 deep, rounded lobes, dull green and often fuzzy. The acorns are long and bullet-shaped, 1 to 2 inches, and ripen in a single year. Young bark is gray and checkered; old bark turns darker and deeply fissured. From a distance, look for the drooping branch ends; on old trees they can touch the ground. It’s winter deciduous, so you get summer shade and winter sun, the trade covered in this guide to seasonal shade trees.

Should you plant it? Yes, if you have the room. Plant it at least 18 feet from your foundation, 25 feet from a pool, and 30 feet from power lines, and expect moderate to fast growth. It’s in the white group, so it’s resistant to sudden oak death. Mature valley oaks are sensitive to overwatering, pruning, grade changes, and asphalt over the roots, which covers most of what a remodel does to a yard. Sacramento County residents can get one free through the Tree Foundation’s free shade tree program.

Coast live oak (Quercus agrifolia)

The evergreen oak of the California coast and the Bay Area hills. It grows 20 to 50 feet high and wide, with old trees reaching 100. Planting, pruning, and the summer water rule are in our coast live oak care guide.

How to identify it: Feel the leaf. Coast live oak leaves are convex, with the edges curling down, spiny like holly, shiny on top, with little tufts of fuzz where the veins meet underneath. Set one on a table and it rocks like an upside-down bowl. The acorn is narrow and pointed, 1 to 1.5 inches. Here’s the catch for anyone using the acorn rule: coast live oak is a red oak, but it is the only red (black) oak in California whose acorns develop in one year.

Should you plant it? On the coast and around the Bay, yes. Inland, think twice. Sudden oak death, the disease bay laurel spreads, is the most serious threat to it, and summer watering can bring on Armillaria root rot or Phytophthora crown rot. The Sacramento Tree Foundation isn’t providing it at this time, and in the valley interior live oak fills the same role.

Blue oak (Quercus douglasii)

The oak of California’s dry foothills, found mostly in the foothills of the Coast Ranges and Sierra Nevada below 3,500 feet.

How to identify it: The color gives it away. The leaves are 1 to 3 inches, distinctly bluish-green, with wavy edges or shallow, irregular lobes and no bristles. The blue is strongest in drought. The bark is light gray and checkered. In a drought year it can drop its leaves early; that’s normal and no reason to start watering.

Should you plant it? Only on a dry site where lawn sprinklers will never reach it. Blue oaks prefer dry soils and do not like to be over-watered, and the Sacramento Tree Foundation rates the growth “very slow.” It’s a white oak, so it shrugs off sudden oak death. In the wild it usually stops around 30 feet, sometimes 50, the most modest of the three Sacramento natives.

Interior live oak (Quercus wislizeni)

The evergreen native for inland Northern California, and my pick for year-round shade in a Sacramento yard with room for a big tree.

How to identify it: It looks like coast live oak until you hold a leaf. Interior live oak leaves are flat, shiny green above and yellow-green below, with either smooth edges or sharp teeth, and no fuzz tufts underneath. Young leaves tend to be toothy and mature to smooth-sided. The acorns take two seasons, so this one follows the red oak rule.

Should you plant it? Yes, in the valley. Expect 45 to 65 feet tall and 50 to 60 wide, with very low water needs once established, and moderate to fast growth. It wants 15 feet from the foundation. Because it’s evergreen, you don’t get winter sun through it, so put it on the north or west side, not over the south windows.

Oregon white oak (Quercus garryana)

How to identify it: Leaves are 3 to 6 inches, shiny dark green, with 5 to 9 irregular rounded lobes that often touch or overlap. Acorns are about an inch, with a shallow cap, and ripen in one season. It looks a lot like a valley oak with fatter, glossier leaves.

Should you plant it? North of the Bay and up into Oregon, it’s the native to plant. It grows 25 to 65 feet and is the only native oak in Washington and British Columbia, and the Forest Service estimates its lifespan at 500 years. Sacramento gardeners are better served by valley oak.

Canyon live oak (Quercus chrysolepis)

How to identify it: It’s the oak with two leaf shapes on one branch, smooth-edged and spiny holly-like, and young leaves with golden fuzz underneath. The real giveaway is the acorn cap, a golden, woolly cup that earned it the name golden-cup oak. The acorns take two years to mature.

Should you plant it? On a slope, yes. It grows 20 to 80 feet, slowly, handles drought once established, and holds rocky banks. It’s also a sudden oak death host, so skip it where bay laurels are thick.

Eastern and Midwestern oaks you’ll see at nurseries

These are the oaks of the eastern half of the country. Several grow in Sacramento, and most want more summer water than the natives. Annual oak growth rates for eight of them are in a separate guide.

White oak (Quercus alba)

How to identify it: The textbook white oak leaf, 4 to 9 inches with 5 to 9 deep, rounded, even lobes and no bristles. The bark is light ashy gray and scaly. Acorns are 3/4 to 1 inch with a warty cap and mature the first year.

Should you plant it? Only if you’re planting for your grandkids. White oak grows slowly to 80 to 100 feet in most settings, has a deep taproot that makes it hard to transplant, and doesn’t belong near structures or pavement. Zones 3 to 9.

Northern red oak (Quercus rubra)

How to identify it: The textbook red oak leaf: about 7 inches, with 7 to 11 shallow lobes ending in bristle-tipped teeth. Mature bark has flat-topped ridges that look like ski tracks running down the trunk. Acorns are 3/4 to 1.5 inches with a flat cap and take two growing seasons.

Should you plant it? In the East, it’s the fast oak, rated rapid in zones 4 to 8. Here in Sacramento it grows moderate to slow, with moderate water needs. It’s in the red group, which oak wilt hits hardest, so in the Midwest and East, Penn State advises no pruning from April through November.

Pin oak (Quercus palustris)

How to identify it: Leaves are about 5 inches with 5 bristle-tipped lobes cut almost to the midrib. The branching is the easiest tell: lower branches angle down, middle ones run flat, upper ones point up. Young trees hold their dead leaves all winter.

Should you plant it? Only in acidic soil. Pin oak gets iron chlorosis in alkaline ground, which yellows the leaves all summer and can kill the tree. It’s a rapid grower to 50 to 70 feet in zones 4 to 8.

Bur oak (Quercus macrocarpa)

How to identify it: Two things. The leaves are huge, up to 12 inches, with 5 to 7 rounded lobes and two middle sinuses that nearly cut the leaf in half. The acorn cup has a fringed, mossy edge that wraps a third or more of the nut, like a chestnut bur.

Should you plant it? It’s the white oak for bad soil. It handles clay, rocky ground, and alkaline soil better than most oaks, and reaches 70 to 80 feet tall and wide in zones 3 to 8. In Sacramento it needs a bit more water than the native oaks while it establishes, then gets by on little.

Swamp white oak (Quercus bicolor)

How to identify it: Turn a leaf over. The top is glossy green and the underside is silvery white and fuzzy, which is where bicolor comes from. The lobes are shallow and coarsely toothed. The acorns hang on long stalks.

Should you plant it? In a low spot that floods in spring and dries out in summer, it’s the right oak. Its root system handles spring flooding and fairly dry summers, though young trees are hard to transplant and establish. It reaches 50 to 60 feet in zones 4 to 8.

Willow oak (Quercus phellos)

How to identify it: Nobody guesses oak at first. The leaves are 4 to 5 inches long and only about an inch wide, smooth-edged like a willow, with a single bristle at the tip. That bristle and the half-inch acorns put it in the red group.

Should you plant it? It’s the best eastern oak for a Sacramento street or lawn. NC State rates it rapid, 40 to 75 feet in zones 5 to 9, with a fibrous root system that transplants well. It also drops fewer acorns than other oaks around Sacramento, so there’s less to rake, and once mature it handles both drought and occasional flooding.

Southern live oak (Quercus virginiana)

“Live oak” means evergreen, not a botanical group. Coast live oak is a red oak, canyon live oak is intermediate, and southern live oak sits on the white side: it hybridizes with bur oak, swamp white oak, and post oak, and its acorns ripen in one season.

How to identify it: Small, thick leaves, 2 to 5 inches, shiny on top and gray-fuzzy underneath, mostly smooth-edged. The shape does the rest: rarely over 50 feet tall, with gnarled limbs reaching 40 to 100 feet wide.

Should you plant it? Only on a big lot. In Sacramento it grows fast, needs moderate water, and spreads 60 to 100 feet, more than most suburban backyards have. Zones 8 to 10.

Shumard oak (Quercus shumardii)

How to identify it: Leaves up to 7 inches with 2 to 4 pairs of pointed, bristle-tipped lobes, shiny dark green, turning red in fall. Acorns mature the second year.

Should you plant it? It’s a red oak built for heat, tolerant of drought, dry soil, air pollution, and short-term flooding, at 50 to 70 feet tall and a narrower 30 to 40 feet wide, in zones 5 to 9.

Non-native evergreen oaks for Sacramento

Two imported evergreen oaks earn a place in a dry-summer Sacramento yard, and the Tree Foundation rates both as low water users.

Cork oak (Quercus suber)

How to identify it: Push on the trunk. Cork oak bark is light gray, thick, spongy, and deeply furrowed, up to 12 inches thick on old trees, and it’s the same bark that becomes wine corks. The leaves are leathery, sparsely toothed, dark green above and gray-fuzzy below.

Should you plant it? Yes, as a low-water evergreen shade tree. In Sacramento it reaches 50 to 70 feet tall and wide. It comes from the western and central Mediterranean, the same dry-summer pattern we have. One warning: Phytophthora root rot commonly affects oaks in irrigated landscapes, particularly coast live oak and cork oak, so keep it out of the lawn.

Holly oak (Quercus ilex)

How to identify it: Look for a dense, dark green evergreen canopy on strong branches. From a distance it reads as a solid dark mass, unlike the open, airy crowns of the deciduous oaks.

Should you plant it? For a screen or heavy year-round shade, yes. It’s a hardy tree and grows at a moderate pace to 50 to 70 feet tall and 50 to 60 wide.

How to choose an oak for your yard

Measure first. Most oaks on this list top 50 feet, and many spread as wide as they grow tall. The Sacramento Tree Foundation’s minimum planting distances for oaks are 15 feet from a foundation (18 for valley oak), 25 feet from a pool, and 30 feet from power lines. If your backyard can’t give an oak 30 feet of clear space in every direction, plant something smaller.

Match the oak to your water. Severe Armillaria root rot commonly develops in native oaks exposed to prolonged summer irrigation, usually after someone installs irrigated landscaping around an existing oak. If the tree has to share a watered lawn, pick an eastern oak that takes moderate water, such as northern red oak, willow oak, or bur oak, rather than a native. If you want a native, give it a native, low-water garden. Our list of Sacramento’s native trees has companion trees that live on the same dry schedule.

Young oaks are the exception. Irrigating valley oak seedlings for the first few years greatly increases survival and growth. For the first two or three summers, water deeply every week or two, then taper off. A TreeGator watering bag makes that a five-minute job and soaks the root ball slowly instead of puddling at the trunk.

Know your disease risk. On the coast and in the Bay Area, sudden oak death is the threat to coast live oak and canyon live oak, and the white group (valley, blue, Oregon white) is resistant. In the Midwest and East, oak wilt is the threat, most severe in the red oak group while killing white oaks more slowly.

Check the rules before you cut. Many California cities and counties regulate pruning and removal of native oaks above a certain trunk size. Call your city before you take a saw to a big one, and hire a certified arborist for anything above ladder height. Here’s how to vet an arborist before you sign anything.

Frequently asked questions

How many types of oak trees are there?

About 500 species of oak trees and shrubs grow worldwide, according to the UC Davis Arboretum, and 91 are native to the United States, according to The Morton Arboretum. California’s native oaks fall into three groups: white oaks such as valley oak and blue oak, red oaks such as coast live oak and interior live oak, and intermediate oaks such as canyon live oak.

How do you tell a red oak from a white oak?

Look at the leaf tips. Red oak leaves have pointed lobes tipped with a small bristle; white oak leaves have rounded lobes with no bristles. Then check the acorns: white oak acorns ripen in one season, while most red oak acorns take two. Coast live oak is the exception, a red oak whose acorns ripen in one year.

Which oak tree grows the fastest?

Willow oak, northern red oak, and pin oak are all rated rapid growers by NC State Extension, at 2 feet or more a year in good conditions. Among California natives, the Sacramento Tree Foundation rates valley oak, coast live oak, and interior live oak as moderate to fast. White oak and blue oak are the slow ones.

What is the best oak tree for a small yard?

None of the common landscape oaks is small, and most top 50 feet. Blue oak is the most modest of the Sacramento natives, usually around 30 feet in the wild, and still needs 15 feet from your foundation. For a yard under about 40 feet across, plant a smaller species.

Can I plant a valley oak in Sacramento?

Yes. Valley oak is native here and grows 50 to 80 feet tall and wide. Plant it at least 18 feet from the foundation and 30 feet from power lines, water deeply for the first few summers, then taper off. The Sacramento Tree Foundation offers valley oaks free to Sacramento County residents.

Do native California oaks need summer water?

Young ones do for the first few summers. Established native oaks do not, and regular summer irrigation is what kills many of them through Armillaria root rot, according to the USDA Forest Service.

The planting and care products linked across this site are collected in the Tree Planting and Watering Essentials list on my Amazon storefront.