North America Native Plant

Hybrid Oak

Botanical name: Quercus ×rudkinii

USDA symbol: QURU2

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Synonyms: Quercus ×dubia Ashe (QUDU6)   

Hybrid Oak: A Native Tree Worth Considering for Your Landscape If you’re looking to add a sturdy, native tree to your landscape, you might want to get acquainted with the hybrid oak (Quercus ×rudkinii). This fascinating tree represents nature’s own botanical experiment—a natural cross between two oak species that has ...

Hybrid Oak: A Native Tree Worth Considering for Your Landscape

If you’re looking to add a sturdy, native tree to your landscape, you might want to get acquainted with the hybrid oak (Quercus ×rudkinii). This fascinating tree represents nature’s own botanical experiment—a natural cross between two oak species that has quietly made its home across much of the eastern United States.

What Makes This Oak Special?

The hybrid oak is a true American native, having evolved naturally in the wild rather than being created in a nursery. As a perennial woody tree, it follows the classic oak blueprint: a single strong trunk that can grow well beyond 13-16 feet in height, creating the kind of substantial presence that makes oaks such beloved landscape anchors.

You might also see this tree referenced by its synonym, Quercus ×dubia, in some botanical references, but don’t let the scientific names intimidate you—this is simply a hardy, dependable oak tree that knows how to thrive in American conditions.

Where You’ll Find Hybrid Oak Growing Wild

This adaptable tree has established itself across a impressive swath of the country, calling home to states from the Atlantic coast to the Gulf of Mexico. You can find hybrid oak growing naturally in Arkansas, Delaware, Florida, Georgia, Louisiana, Mississippi, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, and Virginia.

Why Consider Planting Hybrid Oak?

There are several compelling reasons to give this native tree a spot in your landscape:

  • Native Heritage: As a native species, it’s perfectly adapted to local conditions and supports local ecosystems
  • Low Maintenance: Native trees typically require less water, fertilizer, and pest management once established
  • Longevity: Oaks are famous for their impressive lifespans, making this a true investment in your property’s future
  • Wildlife Support: Like other oaks, this species likely provides valuable habitat and food sources for local wildlife

The Challenge: Limited Availability

Here’s where things get a bit tricky. While hybrid oak is undoubtedly a worthy addition to any native plant garden, finding it at your local nursery might prove challenging. As a natural hybrid that hasn’t been extensively cultivated commercially, it’s not commonly available in the nursery trade.

Growing Hybrid Oak Successfully

While specific growing requirements for this particular hybrid aren’t well-documented, we can make educated assumptions based on its oak family heritage and native range:

  • Soil: Most oaks prefer well-draining soil and can tolerate a range of soil types
  • Sunlight: Full sun to partial shade, like most oak species
  • Climate: Given its wide geographic distribution, it’s likely quite adaptable to various climate conditions within its native range
  • Space: Plan for a mature tree size—oaks need room to spread their canopy

Alternatives to Consider

If you can’t locate hybrid oak for your garden, don’t despair! Consider these readily available native oak alternatives that might work in your landscape:

  • White Oak (Quercus alba) – widely available and adaptable
  • Southern Live Oak (Quercus virginiana) – perfect for southern gardens
  • Northern Red Oak (Quercus rubra) – excellent for northern climates
  • Post Oak (Quercus stellata) – great for challenging sites

The Bottom Line

Hybrid oak represents the fascinating world of natural plant hybridization, creating trees that combine the best traits of their parent species. While it might not be the easiest oak to find at your local garden center, its native status and likely resilience make it worth seeking out if you’re committed to creating a truly native landscape.

If you do manage to locate one, you’ll be adding a piece of American botanical history to your garden—a tree that represents nature’s own selective breeding program, perfectly adapted to thrive in the landscapes where it evolved.

Hybrid Oak

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Hamamelididae

Order

Fagales

Family

Fagaceae Dumort. - Beech family

Genus

Quercus L. - oak

Species

Quercus ×rudkinii Britton (pro sp.) [marilandica × phellos] - hybrid oak

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA