North America Native Plant

Hybrid Oak

Botanical name: Quercus ×substellata

USDA symbol: QUSU3

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Hybrid Oak: A Mysterious Native Tree Worth Knowing About Meet the hybrid oak (Quercus ×substellata), one of nature’s more elusive creations. This native tree represents the fascinating world of oak hybrids – those special crosses between different oak species that occur naturally in the wild. While this particular hybrid oak ...

Hybrid Oak: A Mysterious Native Tree Worth Knowing About

Meet the hybrid oak (Quercus ×substellata), one of nature’s more elusive creations. This native tree represents the fascinating world of oak hybrids – those special crosses between different oak species that occur naturally in the wild. While this particular hybrid oak might not be filling up your local nursery shelves, it’s worth understanding what makes it unique.

What Makes This Oak Special?

The × in Quercus ×substellata tells us this is a hybrid – essentially nature’s own cross-breeding experiment between two different oak species. Like many hybrids, this tree combines characteristics from its parent species, creating something entirely new. It’s a perennial woody giant that follows the classic oak blueprint: a single trunk that can tower over 13-16 feet tall, making it a true statement piece in any landscape.

Where You’ll Find It Growing Wild

This hybrid oak calls New Jersey home, though its presence is quite limited compared to more common oak varieties. It’s a native species to the lower 48 states, but don’t expect to stumble across it on every nature walk – this one’s something of a botanical treasure.

The Reality Check: Limited Information Available

Here’s where things get interesting (and a bit frustrating for us plant enthusiasts): there’s remarkably little documented information about this specific hybrid oak. Unlike its more famous oak cousins, Quercus ×substellata hasn’t been extensively studied or widely cultivated. This means we’re missing some key details that would help gardeners make informed decisions:

  • Specific growing conditions and soil preferences
  • USDA hardiness zones
  • Mature size expectations
  • Specific wildlife and pollinator benefits
  • Detailed care requirements

Should You Plant It?

The honest answer? It’s complicated. While this hybrid oak is native and therefore ecologically valuable, the lack of available information makes it challenging to grow successfully. You’re unlikely to find it at your local nursery, and without detailed growing guides, you’d be venturing into uncharted territory.

If you’re drawn to the idea of growing a rare native oak, consider these well-documented alternatives that offer similar benefits:

  • White Oak (Quercus alba)
  • Red Oak (Quercus rubra)
  • Chestnut Oak (Quercus prinus)

General Oak Growing Wisdom

While we can’t provide specific care instructions for this hybrid oak, here are some general principles that apply to most oak species:

  • Plant in fall for best establishment
  • Choose a location with plenty of space for mature size
  • Most oaks prefer well-draining soil
  • Young trees benefit from regular watering
  • Minimal pruning required once established

The Bottom Line

Quercus ×substellata represents the fascinating complexity of native plant diversity – not every species is destined for mainstream gardening fame, but each plays a role in our natural ecosystems. While you probably won’t be planting this particular hybrid oak in your backyard anytime soon, its existence reminds us that there’s still so much to discover about our native flora.

For now, if you want to support native oak diversity in your landscape, stick with the well-documented species that nurseries can provide and experts can guide you through growing successfully. Sometimes the most responsible thing we can do as gardeners is appreciate nature’s mysteries from a distance while supporting conservation efforts that protect rare species like this hybrid oak in their natural habitats.

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 ×substellata Trel. [bicolor × stellata] - 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